Consulta: subjectFacets:"Coral reefs"
Registros recuperados: 203
Data/hora: 03/06/2024 03:13:13

Understanding Resilience in a Vulnerable Industry: the Case of Reef Tourism in Australia
Provedor de dados: 7
Autores: Biggs, Duan; ARC Centre of Excellence for Coral Reef Studies, James Cook University ; ancientantwren@gmail.com.
Tipo: Peer-Reviewed Reports
Palavras-chave: Coral reefs; Disturbance; Global change; Resilience; Shock; Tourism; Vulnerability.
Ano: 2011

Factors Influencing Adaptive Marine Governance in a Developing Country Context: a Case Study of Southern Kenya
Provedor de dados: 7
Autores: Evans, Louisa S.; The School of International Development, University of East Anglia; louisa.evans@jcu.edu.au; Brown, Katrina; The School of International Development, University of East Anglia; k.brown@uea.ac.uk; Allison, Edward H.; The WorldFish Center; e.allison@cgiar.org.
Adaptive governance can be conceptualized as distinct phases of: 1) understanding environmental change; 2) using this understanding to inform decision making; and 3) acting on decisions in a manner that sustains resilience of desirable system states. Using this analytical framework, we explore governance in practice in two case studies in Kenya, that reflect the &amp;#8220;messiness&amp;#8221; of contemporary coastal governance in many developing country contexts. Findings suggest that adaptive marine governance is unlikely to be a smooth process of learning, knowledge sharing, and responding. There are institutional, sociocultural, and political factors, past and present, that influence each phase of both local and state decision making. New local...
Tipo: Peer-Reviewed Reports
Palavras-chave: Coral reefs; Coastal zone; Fisheries; Governance; Inclusion; Knowledge; Participation.
Ano: 2011

Coupling Biophysical and Socioeconomic Models for Coral Reef Systems in Quintana Roo, Mexican Caribbean
Provedor de dados: 7
Autores: Melbourne-Thomas, Jessica; University of Tasmania; Jessica.MelbourneThomas@utas.edu.au; Johnson, Craig R; University of Tasmania; craig.johnson@utas.edu.au; Perez, Pascal; University of Wollongong; pascal.perez@csiro.au; Eustache, Jeremy; Australian National University; jeremy.eustache@voila.fr; Fulton, Elizabeth A; CSIRO Wealth from Oceans Flagship; Beth.Fulton@csiro.au; Cleland, Deborah; Australian National University; deborah.cleland@anu.edu.au.
Transdisciplinary approaches that consider both socioeconomic and biophysical processes are central to understanding and managing rapid change in coral reef systems worldwide. To date, there have been limited attempts to couple the two sets of processes in dynamic models for coral reefs, and these attempts are confined to reef systems in developed countries. We present an approach to coupling existing biophysical and socioeconomic models for coral reef systems in the Mexican state of Quintana Roo. The biophysical model is multiscale, using dynamic equations to capture local-scale ecological processes on individual reefs, with reefs connected at regional scales by the ocean transport of larval propagules. The agent-based socioeconomic model simulates...
Tipo: Peer-Reviewed Insight
Palavras-chave: Biophysical; Coral reefs; Coupled models; Decision support; Socioeconomic; Social&amp;#8211; Ecological systems.
Ano: 2011

Periodic Closures as Adaptive Coral Reef Management in the Indo-Pacific
Provedor de dados: 7
Autores: Cinner, Josh; James Cook University; joshua.cinner@jcu.edu.au; Marnane, Michael J; Wildlife Conservation Society;; McClanahan, Timothy R; Wildlife Conservation Society; tmcclanahan@wcs.org; Almany, Glenn R.; James Cook University;.
This study explores the social, economic, and ecological context within which communities in Papua New Guinea and Indonesia use adaptive coral reef management. We tested whether periodic closures had positive effects on reef resources, and found that both the biomass and the average size of fishes commonly caught in Indo-Pacific subsistence fisheries were greater inside areas subject to periodic closures compared to sites with year-round open access. Surprisingly, both long-lived and short-lived species benefited from periodic closures. Our study sites were remote communities that shared many socioeconomic characteristics; these may be crucial to the effectiveness of adaptive management of reef resources through periodic closures. Some of these factors...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Coral reefs; Socioeconomic; Periodic closures; Traditional management; Social-ecological systems.
Ano: 2006

Linking Ecological and Perceptual Assessments for Environmental Management: a Coral Reef Case Study
Provedor de dados: 7
Autores: Dinsdale, Elizabeth A; Biology Department, San Diego State University; elizabeth_dinsdale@hotmail.com.
Integrating information from a range of community members in environmental management provides a more complete assessment of the problem and a diversification of management options, but is difficult to achieve. To investigate the relationship between different environmental interpretations, I compared three distinct measures of anchor damage on coral reefs: ecological measures, perceptual meanings, and subjective health judgments. The ecological measures identified an increase in the number of overturned corals and a reduction in coral cover, the perceptual meanings identified a loss of visual quality, and the health judgments identified a reduction in the health of the coral reef sites associated with high levels of anchoring. Combining the perceptual...
Tipo: Peer-Reviewed Reports
Palavras-chave: Coral reefs; Perceptual meanings; Social-ecological assessments.
Ano: 2009

Adaptive Harvesting in a Multiple-Species Coral-Reef Food Web
Provedor de dados: 7
Autores: Kramer, Daniel B; Michigan State University; dbk@msu.edu.
The utility of traditional bio-economic harvest models suffers from their dependence on two commonly used approaches. First, optimization is often assumed for harvester behavior despite system complexity and the often neglected costs associated with information gathering and deliberation. Second, ecosystem interactions are infrequently modeled despite a growing awareness that these interactions are important. This paper develops a simulation model to examine the consequences of harvesting at two trophic levels in a coral-reef food web. The model assumes adaptive rather than optimizing behavior among fishermen.  The consequences of changing economic, biological, and social parameters are examined using resilience as an evaluative framework. Three general...
Tipo: Peer-Reviewed Reports
Palavras-chave: Fisheries; Resource economics; Coral reefs; Resilience; Adaptive behavior; Food web; Simulation.
Ano: 2008

Social-Ecological Guilds: Putting People into Marine Historical Ecology
Provedor de dados: 7
Autores: Shackeroff, Janna M; International Coordinator NOAA Coral Reef Conservation Program ; janna.shackeroff@noaa.gov; Campbell, Lisa M; Duke University; lcampbe@duke.edu; Crowder, Larry B; Duke University Marine Laboratory; lcrowder@duke.edu.
Tipo: Peer-Reviewed Reports
Palavras-chave: Conservation; Coral reefs; Local ecological knowledge; Marine historical ecology; Social-ecological systems; Traditional ecological knowledge.
Ano: 2011

Ecological States and the Resilience of Coral Reefs
Provedor de dados: 7
Autores: McClanahan, Tim; Wildlife Conservation Society; crcp@africaonline.co.ke; Polunin, Nicholas; Newcastle University; n.polunin@ncl.ac.uk; Done, Terry; Australian Institute of Marine Science; t.done@aims.gov.au.
We review the evidence for multiple ecological states and the factors that create ecological resilience in coral reef ecosystems. There are natural differences among benthic communities along gradients of water temperature, light, nutrients, and organic matter associated with upwelling-downwelling and onshore-offshore systems. Along gradients from oligotrophy to eutrophy, plant-animal symbioses tend to decrease, and the abundance of algae and heterotrophic suspension feeders and the ratio of organic to inorganic carbon production tend to increase. Human influences such as fishing, increased organic matter and nutrients, sediments, warm water, and transportation of xenobiotics and diseases are common causes of a large number of recently reported ecological...
Tipo: Peer-Reviewed Reports
Palavras-chave: Carbon production; Coral reefs; Diseases; Ecological stress; Fishing; Global climate change; Keystone species; Oligotrophy-eutrophy; Resilience; Trophic ecology.
Ano: 2002

Human Dimensions of Coral Reef Social-Ecological Systems
Provedor de dados: 7
Autores: Kittinger, John N; Center for Ocean Solutions, Stanford University; Impact Assessment, Inc.; jkittinger@gmail.com; Finkbeiner, Elena M; Hopkins Marine Station, Stanford University; elenafinkbeiner@gmail.com; Glazier, Edward W.; Impact Assessment, Inc.; edward.glazier@gmail.com; Crowder, Larry B.; Center for Ocean Solutions, Stanford University; Hopkins Marine Station, Stanford University; Larry.Crowder@Stanford.edu.
Coral reefs are among the most diverse ecosystems on the planet but are declining because of human activities. Despite general recognition of the human role in the plight of coral reefs, the vast majority of research focuses on the ecological rather than the human dimensions of reef ecosystems, limiting our understanding of social relationships with these environments as well as potential solutions for reef recovery. General frameworks for social-ecological systems (SESs) have been advanced, but system-specific approaches are needed to develop a more nuanced view of human-environmental interactions for specific contexts and resource systems, and at specific scales. We synthesize existing concepts related to SESs and present a human dimensions framework...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Coral reefs; Human dimensions; Reciprocity; Social science; Social-ecological systems; Sustainability science.
Ano: 2012

Bioerosion of the coralline alga Hydrolithon onkodes by microborers in the coral reefs of Moorea, French Polynesia
Provedor de dados: 5
Autores: Tribollet, A; Payri, C.
Calcareous skeletons of the coralline alga Hydrolithon onkodes are colonised by a variety of microboring organisms including euendolithic algae. The species composition of microboring organisms as well as the boring patterns and the boring activity differ between live and dead coralline crusts. The microborers inhabiting the live crusts form an obvious, macroscopically visible green layer in the basal part of the crust, which is in contact with the substratum underneath. Some species, primarily Plectonema terebrans (83 %) and Ostreobium quekettii (7 %) grow from the inside towards the crust's surface and produce a dense network of branched filaments. Following the death of the coralline alga, the skeletons are colonised at the surface and bored inward by...
Tipo: Text
Palavras-chave: Bioérosion; Récifs coralliens; Algues corallinacées; Endolithes; Polynésie française; Bioerosion; Coral reefs; Coralline algae; Endoliths; French Polynesia.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43346/42880.pdf

Herbivorous fishes and the potential of Caribbean marine reserves to preserve coral reef ecosystems
Provedor de dados: 5
Autores: Kopp, Dorothee; Bouchon-navaro, Yolande; Louis, Max; Mouillot, David; Bouchon, Claude.
1. The development of macroalgae to the detriment of corals is now one of the major threats to coral reefs. Herbivorous fishes are partly responsible for algal regulation on coral reefs and their overexploitation favours the shift from scleractinian coral-dominated systems towards macroalgae-dominated systems. 2. Marine protected areas (MPAs) that have been established worldwide may benefit coral reefs through the maintenance of high densities of herbivorous fishes which regulate algal growth. 3. The paper assesses whether small MPAs in the Caribbean are able to enhance herbivorous fish stock and by controlling macroalgae help to maintain reef ecosystems. A visual census using band-transects was undertaken around Guadeloupe island where marine reserves...
Tipo: Text
Palavras-chave: Marine protected areas; Canonical analysis of principal coordinates; Sex change; Coral reefs; Phase shifts; Caribbean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12214/9551.pdf

Coral-associated viruses and bacteria in the Ha Long Bay, Vietnam
Provedor de dados: 5
Autores: Thu Pham, The; Thuoc Chu, Van; Viet Ha Bui, Thi; Thuy Nguyen, Thanh; Huy Tran, Quang; Ngoc Mai Cung, Thi; Bouvier, Corinne; Brune, Justine; Villeger, Sebastien; Bouvier, Thierry; Bettarel, Yvan.
Viruses inhabiting the surface mucus layer of scleractinian corals have received little ecological attention so far. Yet they have recently been shown to be highly abundant and could even play a pivotal role in coral health. A fundamental aspect that remains unresolved is whether their abundance and diversity change with the trophic state of their environment. The present study examined the variability in the abundance of viral and bacterial epibionts on 13 coral species collected from 2 different sites in the Ha Long Bay, Vietnam: one station heavily affected by anthropogenic activity (Cat Ba Island) and one protected offshore station (Long Chau Island). In general, viral abundance was significantly higher in coral mucus (mean = 10.6 +/- 2.0 x 10(7)...
Tipo: Text
Palavras-chave: Viruses; Coral-associated bacteria; Mucus; Symbionts; Coral reefs.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00627/73870/73680.pdf

High pCO2 promotes coral primary production
Provedor de dados: 5
Autores: Biscéré, T.; Zampighi, M.; Lorrain, Anne; Jurriaans, S.; Foggo, A.; Houlbrèque, F.; Rodolfo-metalpa, R.
While research on ocean acidification (OA) impacts on coral reefs has focused on calcification, relatively little is known about effects on coral photosynthesis and respiration, despite these being among the most plastic metabolic processes corals may use to acclimatize to adverse conditions. Here, we present data collected between 2016 and 2018 at three natural CO2 seeps in Papua New Guinea where we measured the metabolic flexibility (i.e. in hospite photosynthesis and dark respiration) of 12 coral species. Despite some species-specific variability, metabolic rates as measured by net oxygen flux tended to be higher at high pCO2 (ca 1200 µatm), with increases in photosynthesis exceeding those of respiration, suggesting greater productivity of...
Tipo: Text
Palavras-chave: Ocean acidification; Coral reefs; Acclimatization; Metabolic flexibility; CO2 seeps.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62051/66205.pdf

Towards multidisciplinary indicator dashboards for coral reef fisheries management
Provedor de dados: 5
Autores: Clua, Eric; Beliaeff, Benoit; Chauvet, Claude; David, Gilbert; Ferraris, Jocelyne; Kronen, Mekhi; Kulbicki, Michel; Labrosse, Pierre; Letourneur, Yves; Pelletier, Dominique; Thebaud, Olivier; Leopold, Marc.
The diversity of reef ecosystems, the multiplicity of reef resource uses and the breadth of the range of the island socio-cultural contexts concerned make coral reef fisheries (CRF) management in the South Pacific a complex task. The health and state of the targeted resources depend both on ecosystem characteristics (as determined by ecological and biological factors) and on fishing pressure, whose effects are only partly known. Increasing harvests from commercial and recreational fishing increasingly overlap with traditional Subsistence activity, creating an important CRF management challenge. This paper presents a new approach to CRF assessment and monitoring by providing a set of multidisciplinary indicators. The fisheries system is assessed from three...
Tipo: Text
Palavras-chave: Dashboard; Indicators; Co management; Fishing; Coral reefs.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/2005/publication-716.pdf

Seasonal variations of downward particle fluxes in front of a reef pass (Moorea Island, French Polynesia)
Provedor de dados: 5
Autores: Schrimm, M; Heussner, S; Buscail, R.
Downward particle fluxes off the Taotoi Pass, a typical Polynesian lagoon pass, have been measured over an annual cycle by means of an array of three mooring lines deployed at 40 m depth on the external sandy plain seawards of the Tiahura reef. Each line was equipped with two hand-operated sediment traps located 1.5 and 10 m above the bottom. During the 1-year survey, the traps were deployed for seven periods of 2-3 weeks. One line equipped with an automated trap was further deployed at 400 m depth on the deep fore-reef slope to collect deep settling particles over two consecutive 6-month periods. For all periods investigated, fluxes on the external plain were highest in front of the pass, and decreased by half on either side (up- and downstream with...
Tipo: Text
Palavras-chave: Flux particulaire; Exportation de carbone; Récif corallien; Carbone organique; Carbonate; Particle flux; Carbon export; Coral reefs; Organic carbon; Carbonate.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43320/42934.pdf

How do coral reef Gastropods feel about nuclear blasts? A long-term study of the effects of man-made perturbations
Provedor de dados: 5
Autores: Lanctot, Jl; Legendre, P; Salvat, B.
The resistance to perturbations of reef-dwelling gastropod assemblages was studied on the seaward reefs of Fangataufa atoll (French Polynesia) after their exposure to atmospheric nuclear tests, a major man-made perturbation. We focused on two important aspects: (1) the temporal evolution of the densities of the most important species before and after the tests, and (2) the temporal evolution of the spatial structure of the assemblages. Three transects, crossing several geomorphological zones, were established on the seaward reefs of the atoll. Each transect was sampled at irregular time intervals during a twenty-year period. Several univariate and multivariate methods were used to study (1) the temporal fluctuations in species abundances and ranks, and (2)...
Tipo: Text
Palavras-chave: Atmospheric nuclear tests; Clustering; Coral reefs; Gastropods; Perturbation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20394/18061.pdf

Thermal regime and host clade, rather than geography, drive Symbiodinium and bacterial assemblages in the scleractinian coral Pocillopora damicornis sensu lato
Provedor de dados: 5
Autores: Brener-raffalli, Kelly; Clerissi, Camille; Vidal-dupiol, Jeremie; Adjeroud, Mehdi; Bonhomme, Francois; Pratlong, Marine; Aurelle, Didier; Mitta, Guillaume; Toulza, Eve.
Background: Although the term holobiont has been popularized in corals with the advent of the hologenome theory of evolution, the underlying concepts are still a matter of debate. Indeed, the relative contribution of host and environment and especially thermal regime in shaping the microbial communities should be examined carefully to evaluate the potential role of symbionts for holobiont adaptation in the context of global changes. We used the sessile, long-lived, symbiotic and environmentally sensitive reef-building coral Pocillopora damicornis to address these issues. Results: We sampled Pocillopora damicornis colonies corresponding to two different mitochondrial lineages in different geographic areas displaying different thermal regimes: Djibouti,...
Tipo: Text
Palavras-chave: Coral holobiont; Microbiota; Bacterial communities; Symbiodinium assemblages; Thermal adaptation; Scleractinian corals; Coral reefs; Pocillopora damicornis.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00429/54076/55380.pdf

Caractérisation des fonds marins et estimation bathymétrique par inversion de modèle de transfert radiatif : Application à l'imagerie hyperspectrale en milieu corallien
Provedor de dados: 5
Autores: Petit, Tristan.
Airborne hyperspectral imaging is a potential candidate for mapping and monitoring coral reefs at large scale and with high spatial resolution. In this thesis, we first present the processing steps to be applied to hyperspectral signals for extracting information about seabed types, bathymetry and water optical properties, and we discuss their efficiency with respect to two main confounding factors: (i) low signal to noise ratio of the measured signals, and (ii) large number and variability of physical interactions occurring between the entrance of sunlight into the atmosphere and its measurement by the hyperspectral sensor. Considering these limitations, we examine the performance of an already existing water column processing method: semi-analytical...
Tipo: Text
Palavras-chave: Récifs coralliens; Bathymétrie; Cartographie des habitats benthiques; Hyperspectral; Modèle de transfert radiatif; Inversion par optimisation; Analyse de sensibilité; Coral reefs; Bathymetry; Seabed type mapping; Hyperspectral; Radiative transfer model; Inversion by optimization; Sensitivity analysis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00400/51135/51905.pdf

Hindcast and Near Real-Time Monitoring of Green Macroalgae Blooms in Shallow Coral Reef Lagoons Using Sentinel-2: A New-Caledonia Case Study
Provedor de dados: 5
Autores: Brisset, Maele; Van Wynsberge, Simon; Andréfouët, Serge; Payri, Claude; Soulard, Benoit; Bourassin, Emmanuel; Le Gendre, Romain; Coutures, Emmanuel.
Despite the necessary trade-offs between spatial and temporal resolution, remote sensing is an effective approach to monitor macroalgae blooms, understand their origins and anticipate their developments. Monitoring of small tropical lagoons is challenging because they require high resolutions. Since 2017, the Sentinel-2 satellites has provided new perspectives, and the feasibility of monitoring green algae blooms was investigated in this study. In the Poé-Gouaro-Déva lagoon, New Caledonia, recent Ulva blooms are the cause of significant nuisances when beaching. Spectral indices using the blue and green spectral bands were confronted with field observations of algal abundances using images concurrent with fieldwork. Depending on seabed compositions and...
Tipo: Text
Palavras-chave: Ulva; Sentinel-2; Satellite; Remote sensing; Algal bloom; Coral reefs; Pacific lagoons.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00668/77968/80184.pdf

Interplay between hormonal and morphological changes throughout a critical period of larval rearing in the orbicular batfish
Provedor de dados: 5
Autores: Waqalevu, Viliame; Besson, Marc; Gache, Camille; Roux, Natacha; Fogg, Lily; Bertucci, Frédéric; Metian, Marc; Lafille, Marc-andre; Maamaatuaiahutapu, Moana; Gasset, Eric; Saulnier, Denis; Laudet, Vincent; Lecchini, David.
Advancement and diversification of the aquaculture industry is reliant on the development of captive breeding and rearing protocols for novel fish species. Orbicular batfish (Platax orbicularis), a major emerging species in Polynesian aquaculture, live in brackish and marine waters around coral reefs, and are highly prized by Pacific Island communities for their high-quality meat. The present study describes the larval growth of P. orbicularis from hatching until 16 days after hatching (DAH) using meristics and thyroid hormone (T3) quantification. Our study highlighted that metamorphosis of P. orbicularis is critical to their production in aquaculture, as found for other species. Levels of the thyroid hormone T3 in P. orbicularis reached a peak at 12 DAH...
Tipo: Text
Palavras-chave: Larval rearing; Mariculture; Metamorphosis; South pacific countries; Coral reefs.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76816/77989.pdf

People and the changing nature of coral reefs
Provedor de dados: 5
Autores: Hoegh-guldberg, Ove; Pendleton, Linwood; Kaup, Anne.
Coral reefs are biodiverse and productive ecosystems but are threatened by local and global stresses. The resulting loss of coral reefs is threatening coastal food and livelihoods. Climate projections suggest that coral reefs will continue to undergo major changes even if the goals of the Paris Agreement (Dec 2015) are successfully implemented. Ecological changes include modified food webs, shifts in community structure, reduced habitat complexity, decreased fecundity and recruitment, changes to fisheries productivity/opportunity, and a shift in the carbonate budget of some ecosystems toward dissolution and erosion of calcium carbonate stocks. Broad estimates of the long-term (present value) of services provided by the ocean’s ecological assets exist and...
Tipo: Text
Palavras-chave: Coral reefs; Global climate change; 'the dumb farmer'; Adaptability; Human interactions.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61196/64739.pdf

Etat de santé des habitats et peuplements de poissons des atolls d’Entrecasteaux, zone inscrite au Patrimoine Mondial de l’Humanité et Parc naturel de la mer de Corail. Evaluation initiale par stations vidéo rotatives STAVIRO
Provedor de dados: 5
Autores: Schohn, Thomas; Pelletier, Dominique; Carpentier, Liliane.
The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. Observation relies on remote unbaited underwater video, using the STAVIRO rotating technique (Pelletier et al. 2012).  This survey was conducted in 2015 in Entrecasteaux Reefs, both located within the Coral Sea Natural Park, and part of World Heritage site. 109 STAVIRO were validated in 9 days, covering the reefs and geomorphological units in the area. Images were analyzed to characterize the habitat surrounding each station, and fishes based on a list of 565 species (Pelletier et al. 2016).  28 indicators were computed and represented on maps (Sextant server). Indicators were analyzed using the...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Aire Marine Protégée; Patrimoine mondial; Parc de la mer de Corail; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Cartes; Sextant; PAMPA; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Marine Protected Area: Coral Sea Natural Park; World Heritage; Coral reefs; New Caledonia; Indicator; Dashboard; Map; Sextant; PAMPA.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51760/52357.pdf

Spatial management can significantly reduce dFAD beachings in Indian and Atlantic Ocean tropical tuna purse seine fisheries
Provedor de dados: 5
Autores: Imzilen, Taha; Lett, Christophe; Chassot, Emmanuel; Kaplan, David.
Debris from fisheries pose significant threats to coastal marine ecosystems worldwide. Tropical tuna purse seine fisheries contribute to this problem via the construction and deployment of thousands of human-made drifting fish aggregating devices (dFADs) annually, many of which end up beaching in coastal areas. Here, we analyzed approximately 40,000 dFAD trajectories in the Indian Ocean and 12,000 dFAD trajectories in the Atlantic Ocean deployed over the decade 2008–2017 to identify where and when beachings occur. We find that there is tremendous promise for reducing beaching events by prohibiting deployments in areas most likely to lead to a beaching. For example, our results indicate that 21% to 40% (depending on effort redistribution after closure) of...
Tipo: Text
Palavras-chave: Marine pollution; Fishing debris; Coral reefs; Fish aggregating device (FAD); Ocean currents.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00669/78060/80807.pdf

Genetic connectivity of the coral-eating sea star Acanthaster planci during the severe outbreak of 2006-2009 in the Society Islands, French Polynesia
Provedor de dados: 5
Autores: Yasuda, Nina; Taquet, Coralie; Nagai, Satoshi; Yoshida, Terutoyo; Adjeroud, Mehdi.
Occasional population outbreaks of the crown-of-thorns sea star, Acanthaster planci, are a major threat to coral reefs across the Indo-Pacific. The presumed association between the serial nature of these outbreaks and the long larval dispersal phase makes it important to estimate larval dispersal; many studies have examined the population genetic structure of A.planci for this purpose using different genetic markers. However, only a few have focused on reef-scale as well as archipelago-scale genetic structure and none has used a combination of different genetic markers with different effective population sizes. In our study, we used both mtDNA and microsatellite loci to examine A.planci population genetic structure at multiple spatial scales (from &lt;2km...
Tipo: Text
Palavras-chave: Acanthaster planci; Coral reefs; Microsatellite loci; MtDNA; Population genetic structure.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00667/77936/80151.pdf

Influence of Freshwater Discharges on Biogeochemistry and Benthic Communities of a Coral Reef Ecosystem (La Réunion Island, Indian Ocean)
Provedor de dados: 5
Autores: Tedetti, Marc; Bigot, Lionel; Turquet, Jean; Guigue, Catherine; Ferretto, Nicolas; Goutx, Madeleine; Cuet, Pascale.
We investigated the influence of freshwater discharges on biogeochemistry and benthic communities of La Saline fringing reef, the largest coral reef system of La Réunion Island (France, Indian Ocean). Sampling was conducted in February–March 2012 along a land-ocean continuum, including rivers, groundwater, reef waters, and oceanic waters. Our results indicated the discharges of basalt groundwater (enriched in nitrates) in the southern part of the reef, and the discharges of sand groundwater and river waters (enriched in organic matter) in sites located northward. These discharges mainly impacted fore reef surface waters, while groundwater resurgences were more diffuse and not clearly detected in depth. We highlighted the relationship Si(OH)4/NO3– to...
Tipo: Text
Palavras-chave: Coral reefs; La Reunion; Indian Ocean; Eutrophication; Groundwater; Nutrients; Organic matter; Fluorescence.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77030/78316.pdf

Gravity of human impacts mediates coral reef conservation gains
Provedor de dados: 5
Autores: Cinner, Joshua E.; Maire, Eva; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mora, Camilo; Barnes, Michele L.; Kittinger, John N.; Hicks, Christina C.; D'Agata, Stephanie; Hoey, Andrew S.; Gurney, Georgina G.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison; Hardt, Marah J.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlotte; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Pardede, Shinta; Mouillot, David.
Coral reefs provide ecosystem goods and services for millions of people in the tropics, but reef conditions are declining worldwide. Effective solutions to the crisis facing coral reefs depend in part on understanding the context under which different types of conservation benefits can be maximized. Our global analysis of nearly 1,800 tropical reefs reveals how the intensity of human impacts in the surrounding seascape, measured as a function of human population size and accessibility to reefs ("gravity"), diminishes the effectiveness of marine reserves at sustaining reef fish biomass and the presence of top predators, even where compliance with reserve rules is high. Critically, fish biomass in high-compliance marine reserves located where human impacts...
Tipo: Text
Palavras-chave: Marine reserves; Fisheries; Coral reefs; Social-ecological; Socioeconomic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56115/68021.pdf

Etat de santé des habitats et peuplements de poissons des îles et récifs de l’Astrolabe, Pétrie et Walpole, Parc Naturel de la Mer de Corail. Evaluation initiale par stations vidéo rotatives STAVIRO
Provedor de dados: 5
Autores: Schohn, Thomas; Bockel, Thomas; Carpentier, Liliane; Pelletier, Dominique.
- The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. The survey relies on remote unbaited underwater video observations, using the STAVIRO rotating technique.  - The study pertains to the reefs of Astrolabe, Pétrie and Walpole Island, located within the Coral Sea Natural Park. The survey conducted in 2014 covers the entire area, and the sampling design was stratified according to reef type. 95 stations were validated. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a list of 565 fish species (cf. AMBIO/A/1).  - 28 indicators were computed and mapped (maps available on a Sextant server)....
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Parc naturel mer de Corail; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Ecosystème corallien; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Marine Protected Area: Coral Sea Natural Park; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51738/52324.pdf

Utilisation de la technique vidéo STAVIRO pour l’observation et le suivi des ressources et des écosystèmes récifo‐lagonaires de Mayotte. Etude pilote et recommandations pour les suivis futurs. Annexe 2 : Fiches métriques : Influences du statut de protection (Réserve de la passe Longogori), du type géomorphologique et de l’habitat
Provedor de dados: 5
Autores: Roman, William; Pelletier, Dominique; Wickel, Julien; Giannasi, Paul.
• This work deals with coral reef fish resources and communities in the Natural Marine Park of Mayotte, Western Indian Ocean). It relies on remote unbaited underwater video observations, using the STAVIRO rotating technique.  • This document is complementary to the main assessment report:  William Roman and Dominique Pelletier, 2016. The STAVIRO video technique for monitoring fish resources and reef ecosystems in the Natural Marine Park of Mayotte (Western Indian Ocean). Pilot study and recommendations for monitoring. EXPLOCEAN-IFREMER Report.  • It pertains to the assessment of resources with respect to protection status and factors related to local habitat and reef geomorphology. • It comprises the description of the metrics used for the assessment:...
Tipo: Text
Palavras-chave: Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Biodiversité; Ecosystème corallien; AMP; Parc Naturel Marin de Mayotte; Indicateur; PAMPA; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Biodiversity; Coral reefs; MPA; Natural Marine Park of Mayotte; Indicator; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00373/48423/48644.pdf

Distribution spatiale des stocks de poissons récifaux démersaux d'intérêt commercial et effort de pêche en Province Nord de Nouvelle-Calédonie (Pacifique occidental)
Provedor de dados: 5
Autores: Letourneur, Yves; Labrosse, Pierre; Kulbicki, Michel.
Fish from lagoon and reef in New Caledonia are mainly caught by artisanal fisheries and subsistence fishing. The present study aimed at estimating these fish standing stocks, at finding the main factors influencing the spatial distribution of these fish, and at estimating the maximum sustainable yield with considerations for socio-economic aspects sensu late. A total of 1406 stations was surveyed in the Northern Province of New Caledonia. Sampling was stratified according to three zones (north, east and west) and three biotopes (coral reefs, near-reef areas and lagoon bottoms). This work demonstrates the existence of important fish stocks of commercial interest in reefal and lagoonal waters of the Northern Province, estimated at about 138 300 t. The...
Tipo: Text
Palavras-chave: Ichtyofaune démersale; Récifs coralliens; Fonds de lagon; Pêche artisanale; Stocks; Demersal ichthyofauna; Coral reefs; Lagoon bottoms; Artisanal fishing; Standing stocks.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00323/43383/42827.pdf

Phytoplankton composition and selective feeding of the pearl oyster Pinctada margaritifera in the Takapoto lagoon (Tuamotu Archipelago, French Polynesia): in situ study using optical microscopy and HPLC pigment analysis
Provedor de dados: 5
Autores: Loret, P; Pastoureaud, Annie; Bacher, Cedric; Delesalle, B.
The in situ diet of the pearl oyster Pinctada margarifera was determined in the lagoon of Takapoto Atoll by comparing the phytoplankton composition of water and bivalve gut contents using 2 different methods, optical microscopy and HPLC pigment analysis. In order to evaluate the available food resources for pearl oysters in the water column, a new method for estimating the pigment/chlorophyll a (chl a) ratio (based on an inverse analysis) was developed which allowed us to determine the contribution of the main phytoplanktonic groups in terms of chi a. In the water, picocyanobacteria and nanoflagellates predominated, the latter being mainly chlorophytes and prymnesiophytes. Comparisons between the results obtained by the 2 methods of investigation indicated...
Tipo: Text
Palavras-chave: Pearl oyster Pinctada margaritifera; Selective feeding; Natural diet; Phytoplankton pigments; Coral reefs; French Polynesia.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10992/7606.pdf

Environmental significance of microbialites in reef environments during the last deglaciation
Provedor de dados: 5
Autores: Camoin, G; Cabioch, G; Eisenhauer, A; Braga, J; Hamelin, B; Lericolais, Gilles.
In situ microbialites occurring in reef rocks dredged between 80 and 130 in water depth on the modern fore-reef slopes of Tahiti and the Marquesas islands yield ages ranging from 17,100 2900 to 4410 2250 years BP, suggesting that they played a prominent role during the last deglacial sea level rise.   Microbialites developed in both shallow and deep water depositional environments where they characterize various zones of the reef tracts (reef crests, upper reef slopes, deep fore-reef slopes), reflecting contrasting scenarios of microbialite development involving ''reefal microbialites'' in shallow-water settings and ''slope microbialites'' that formed in environments deeper than 1020 in and extending down to more than 100 m.   Reefal microbialites...
Tipo: Text
Palavras-chave: Sea level changes; Nutrients; French polynesia; Holocene; Last deglaciation; Microbialites; Coral reefs.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-4204.pdf

Management strategies for coral reefs and people under global environmental change: 25 years of scientific research
Provedor de dados: 5
Autores: Comte, Adrien; Pendleton, Linwood H.; ,.
Coral reef ecosystems and the people who depend on them are increasingly exposed to the adverse effects of global environmental change (GEC), including increases in sea-surface temperature and ocean acidification. Managers and decision-makers need a better understanding of the options available for action in the face of these changes. We refine a typology of actions developed by Gattuso et al. (2015) that could serve in prioritizing strategies to deal with the impacts of GEC on reefs and people. Using the typology we refined, we investigate the scientific effort devoted to four types of management strategies: mitigate, protect, repair, adapt that we tie to the components of the chain of impact they affect: ecological vulnerability or social vulnerability....
Tipo: Text
Palavras-chave: Coral reefs; Climate change; Ocean acidification; Management; Adaptation.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00418/52917/53872.pdf

Reef Carbonate Productivity During Quaternary Sea Level Oscillations
Provedor de dados: 5
Autores: Husson, L.; Pastier, A. -m.; Pedoja, K.; Elliot, M.; Paillard, D.; Authemayou, C.; Sarr, A. -c.; Schmitt, A.; Cahyarini, S. Y.
Global variations in reef productivity during the Quaternary depend on external parameters that may alter the global chemical balance in the oceans and atmosphere. We designed a numerical model that simulates reef growth, erosion, and sedimentation on coastlines undergoing sea level oscillations, and uplift or subsidence. We further develop a probabilistic evaluation that accounts for variable vertical ground motion, erosion, and foundation morphologies. Absolute sea level change appears primordial, as productivity must have increased by an order of magnitude since the onset of the glacial cycles, approximate to 2.6 Ma. But most important is relative sea level change, i.e., eustasy modulated by uplift or subsidence, that rejuvenates the accommodation space...
Tipo: Text
Palavras-chave: Coral reefs; Sea level; Carbonate; Modeling; Paleoclimate.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00638/74993/75789.pdf

Comparison of visual census and high definition video transects for monitoring coral reef fish assemblages
Provedor de dados: 5
Autores: Pelletier, Dominique; Leleu, Kevin; Mou-tham, Gerard; Guillemot, Nicolas; Chabanet, Pascale.
Monitoring fish and underwater habitats, particularly in and around marine protected areas (MPAs) requires non-destructive observation methods. This is generally achieved by divers conducting underwater visual censuses (UVC), but video-based techniques are now being used more often to observe underwater macrofauna and habitats. A comparison of these two techniques is relevant with the development of high-definition (HD) video, which constitutes a substantial improvement over previously available video resolutions at limited extra cost. We conducted a paired observation experiment involving both HD video and UVC in an MPA located in the New Caledonian lagoon, which is a highly diversified coral reef ecosystem. We compared three techniques for counting fish...
Tipo: Text
Palavras-chave: Fish assemblages; MPA monitoring; High-definition underwater video; Underwater visual censuses (UVC); Coral reefs.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14192/11470.pdf

Sea anemones (Cnidaria: Actiniaria, Corallimorpharia, Ceriantharia, Zoanthidea) from marine shallow-water environments in Venezuela: new records and an updated inventory
Provedor de dados: 5
Autores: González-muñoz, Ricardo; Simões, Nuno; Guerra-castro, Edlin J.; Hernández-ortíz, Carlos; Carrasquel, Gabriela; Mendez, Enio; Lira, Carlos; Rada, Martin; Hernández, Ivan; Pauls, Sheila M.; Croquer, Aldo; Cruz-motta, Juan J.
Background This study compiles the diversity of sea anemones in different shallow habitats (i.e. rocky shores, coral reefs, mangroves and sandy bottoms) in several locations of Venezuela, including the most important marine reserves of Venezuela: Morrocoy National Park, Mochima National Park, Archipiélago de Los Roques National Park, Laguna de La Restinga National Park, Isla de Cubagua, and Chichiriviche de la Costa. Results Twenty-six species of sea anemones sensu lato were documented, from which only two actiniarian species are newly recorded in Venezuela. In addition, specimens of the scientific collection of the Museo Oceanológico Hermano Benigno Román, of Isla de Margarita, Venezuela, were examined and its taxonomic status updated. Conclusions The...
Tipo: Text
Palavras-chave: Caribbean Sea; Coral reefs; Biodiversity; Benthic invertebrate fauna.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77595/79609.pdf

Etat de santé initial des habitats et peuplements de poissons des récifs de Chesterfield-Bellona, Parc Naturel de la Mer de Corail, Campagne de stations vidéo rotatives STAVIRO 2013
Provedor de dados: 5
Autores: Pelletier, Dominique; Bockel, Thomas; Roman, William; Carpentier, Liliane; Laugier, Thierry.
- The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. The surveys rely on remote unbaited underwater video observations, using the STAVIRO rotating technique. Chesterfield and Bellona remote reefs and atolls are located in the Coral Sea Marine Park, northwest of New Caledonia. -This 2013 survey is the first scientific survey covering the entire area, with a sampling design stratified according to reef type. 203 stations were validated within 10 days. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a list of 565 fish species (cf. AMBIO/A/1). - 34 indicators were computed and mapped (maps...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Parc de la Mer de Corail; Aire Marine Protégée; AMP; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Coral Sea Marine Park; Marine Protected Area; MPA; World Heritage; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00381/49247/49700.pdf

Un bilan de la télédétection appliquée aux milieux coralliens
Provedor de dados: 5
Autores: Andrefouet, Serge; Maritorena, Stéphane; Loubersac, Lionel.
The aim of this paper is to present in a practical fashion the status of the use of remote sensing for the study of coral reef environments through the analysis of work published in the years 1980-2000. We review the scales of the potential work and of that actually conducted, the principal applications and their limiting factors. We detail these limitations which are of a technological nature (spatial and spectral resolution of sensors), as well as often of a conceptual (role of remote sensing in the study) or methodological (image processing) nature. The understanding of these limitations, in relation to the reality of the field, allows identification of work which could be undertaken in the years 2000.
Tipo: Text
Palavras-chave: Télédétection; Récifs coralliens; Cartographie; Bathymétrie; Classification; Segmentation; Remote sensing; Coral reefs; Mapping; Bathymetry; Classification; Segmentation.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00089/20044/17685.pdf

Quantifying the shelter capacity of coral reefs using photogrammetric 3D modeling: From colonies to reefscapes
Provedor de dados: 5
Autores: Urbina-barreto, Isabel; Chiroleu, Frédéric; Pinel, Romain; Fréchon, Louis; Mahamadaly, Vincent; Elise, Simon; Kulbicki, Michel; Quod, Jean-pascal; Dutrieux, Eric; Garnier, Rémi; Henrich Bruggemann, J.; Penin, Lucie; Adjeroud, Mehdi.
Structural complexity plays a key role in the functioning of coral reef ecosystems. Reef-building corals are major contributors to this complexity, providing shelter and food for numerous invertebrates and fish species. Both structural complexity and shelter capacity of reefscapes are determined by several components such as spurs and grooves, slope, caves and holes, vegetation and coral colonies. Quantifying the shelter capacity from coral colonies to reefscapes is a fundamental step to estimating ecosystem potential to support biodiversity. Here, we applied underwater photogrammetry to quantify shelter volumes provided by individual coral colonies. Overall, 120 3D models of coral colonies from branching, massive, columnar and tabular growth forms were...
Tipo: Text
Palavras-chave: Coral reefs; Reef-building corals; Photogrammetry; 3D models; Predictive models; Shelter capacity; Structural complexity; Coral growth forms.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00659/77065/78372.pdf

Fish communities of Geyser and Zelee coral banks (Western Indian Ocean).
Provedor de dados: 5
Autores: Chabanet, P; Tessier, E; Durville, P; Mulochau, T; Rene, Francois.
The ichtyofauna of Geyser and Zelee coral banks (north of Mozambique canal) was investigated in 1996, this work being the first quantitative study on this area. Quantitative data were collected on 11 stations (mean depth 18 m) by visual observations along 50 m transect, widened to 2 m for small sedentary species, and to 5 m for commercial species with a large action range. The main descriptors of the fish communities (species richness, abundance per species) and the trophic structure (omnivorous, herbivorous, carnivorous, browsers of sessile invertebrates) were described and analysed.A total of 294 fish species, belonging to 43 families were recorded. The species richness varied from 45 to 83 species / station, and the abundance, from 292 to 1322...
Tipo: Text
Palavras-chave: Ichtyofauna; Western Indian Ocean; Coral reefs; Geyser and Zelee; Trophic structure.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00000/10132/7687.pdf

Photoacclimatization in the zooxanthellae of Pocillopora verrucosa and comparison with a pelagic algal community
Provedor de dados: 5
Autores: Maritorena, S; Payri, C; Babin, M; Claustre, H; Bonnafous, L; Morel, A; Rodiere, M.
Photoacclimatization of zooxanthellae extracted from the coral Pocillopora verrucoso was studied through the determination of pigments, light absorption and photosynthetic parameters. for samples collected in summer and winter between 1 and 40 m on a northwestern reef of Tahiti (French Polynesia). The same measurements were also performed on phytoplanktonic samples collected at a stable oceanic site north of the island. For the zooxanthellae, the variations with depth of all the parameters were generally of small amplitude. Seasonal differences were also observed. The photosynthetic to non-photosynthetic pigments ratio was higher at depth in both seasons and was higher in winter. The intracellular concentration of chlorophyll a and photosynthetic pigments...
Tipo: Text
Palavras-chave: Zooxanthelles; Photoacclimatation; Pocillopora verrucosa; Phytoplancton; Récifs coralliens; Zooxanthellae; Photoacclimatization; Pocillopora verrucosa; Phytoplankton; Coral reefs.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43313/42941.pdf

Multiple Stressors and Ecological Complexity Require a New Approach to Coral Reef Research
Provedor de dados: 5
Autores: Pendleton, Linwood H.; Hoegh-guldberg, Ove; Langdon, Chris; Comte, Adrien.
Ocean acidification, climate change, and other environmental stressors threaten coral reef ecosystems and the people who depend upon them. New science reveals that these multiple stressors interact and may affect a multitude of physiological and ecological processes in complex ways. The interaction of multiple stressors and ecological complexity may mean that the negative effects on coral reef ecosystems will happen sooner and be more severe than previously thought. Yet, most research on the effects of global change on coral reefs focus on one or few stressors, pathways or outcomes (e.g., bleaching). Based on a critical review of the literature, we call for a regionally targeted strategy of mesocosm-level research that addresses this complexity and...
Tipo: Text
Palavras-chave: Coral reefs; Multiple stressors; Mesocosm-level research; Climate change; Ocean acidification.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00636/74835/75224.pdf

How does eutrophication impact bundles of ecosystem services in multiple coastal habitats using state-and-transition models
Provedor de dados: 5
Autores: Kermagoret, Charlene; Claudet, Joachim; Derolez, Valerie; Nugues, Maggy M.; Ouisse, Vincent; Quillien, Nolwenn; Baulaz, Yoann; Le Mao, Patrick; Scemama, Pierre; Vaschalde, Diane; Bailly, Denis; Mongruel, Remi.
One of the current major scientific challenges to sustain social-ecological systems is to improve our understanding of the spatial and temporal dynamics of the relationships between biodiversity, ecosystem functioning and ecosystem services. Here, we analyse the bundles of ecosystem services supplied by three coastal ecosystems (coastal lagoons, coral reefs and sandy beaches) along a gradient of eutrophication. Based on a state-and-transition model, we analyses the dynamic responses of ecological communities to environmental change and management actions. Although few exceptions are highlighted, increasing eutrophication in the three ecosystem types leads to a degradation of the ecosystem service bundles, particularly for nutrient and pathogen...
Tipo: Text
Palavras-chave: Sandy beaches; Coral reefs; Coastal lagoons; Ecosystem service bundles; Temporal dynamics; Management.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00488/59930/63322.pdf

Evaluation de l’état de santé des habitats et peuplements de poissons de la zone de Voh-Koné-Pouembout, Campagnes de stations vidéo rotatives STAVIRO 2007-2013
Provedor de dados: 5
Autores: Giraud-carrier, Charlotte; Pelletier, Dominique.
• Conducted within the AMBIO project, this work deals with coral reef fish communities and associated habitats, in the New Caledonian lagoons. It aims at assessing the status and trends of habitats and mobile macrofauna in the Voh-Kone-Pouembout lagoon, in the light of demographic and industrial developments and accounting for the existing customary reserve of Oundjo. • It relies on 280 stations collected in 2007 and 2013 using the remote unbaited underwater video STAVIRO rotating technique, which were analysed to characterize habitat, fish assemblages, turtles and sea snakes, from a list of 490 species (AMBIO/A/1). • 143 species (including one turtle species and one sea snake species), belonging to 23 families were observed. The most frequent and abundant...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Impact anthropique; Aire Marine Protégée; Réserve coutumière; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Biodiversity; Fish assemblage; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Anthropogenic impact; Marine Protected Area; MPA; Customary reserve; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47109/47050.pdf

Nouveaux indices quantitatifs pour le suivi des récifs coralliens issus de modélisation 3D par photogrammétrie
Provedor de dados: 5
Autores: Urbina-barreto, Isabel.
Habitat structural complexity plays a key role in the dynamics and resilience of coral reef communities. The critical situation of coral reef ecosystems beseeches a rapid improvement of monitoring tools to assist in the implementation of efficient conservation measures. Today, new reef assessment technologies support researchers and managers to collect information safer, faster, and with greater accuracy. Among them, photogrammetry by Structure-from-Motion (SfM) creates three-dimensional models and reef zone maps from overlapping images to conduct quantitative surveys of benthic communities. This thesis addressed four objectives: 1) define underwater photogrammetry protocols to create 3D models of coral colonies and reefscapes, in order to conduct physical...
Tipo: Text
Palavras-chave: Récifs coralliens; SfM-photogrammétrie; Modèles 3D; Complexité structurelle; Descripteurs de l’habitat; Méthodes de suivi; Récifs coralliens -- Conservation des ressources; Modélisation tridimensionnelle; Photogrammétrie; Habitat (écologie); Coral reefs; SfM-photogrammetry; 3D-models; Structural complexity; Habitat descriptors; Survey methods.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00661/77315/78761.pdf

Genesis and Architecture of Sequences of Quaternary Coral Reef Terraces: Insights From Numerical Models
Provedor de dados: 5
Autores: Pastier, A-m; Husson, L.; Pedoja, K.; Bezos, A.; Authemayou, C.; Arias-ruiz, C.; Cahyarini, S. Y.
The variety of coral reefs morphologies highlights their sensitivities to several forcings; fossil reefs stack in sequences that are accordingly diverse. In order to understand their genesis and architectures, we devised a numerical approach, accounting for Quaternary sea level oscillations, vertical land motion, initial slope, wave erosion, and reef growth. We first test our model on the subsiding sequence of Hawaii and on the uplifting sequence of Wangi-Wangi (Sulawesi) that bears active barriers. We then construct a parametric study that we analyze based on a comprehensive yet compact description of sequences as barcodes, that depict the vertical distribution of a few geometrical characteristics (number, width, and height of the terraces and barriers)....
Tipo: Text
Palavras-chave: Coral reefs; Reef terraces; Numerical modeling; Geomorphology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00637/74917/75771.pdf

Trait structure and redundancy determine sensitivity to disturbance in marine fish communities
Provedor de dados: 5
Autores: Mclean, Matthew; Auber, Arnaud; Graham, Nicholas A J; Houk, Peter; Villéger, Sébastien; Violle, Cyrille; Thuiller, Wilfried; Wilson, Shaun K.; Mouillot, David.
‘Functional’ diversity is believed to influence ecosystem dynamics through links between organismal traits and ecosystem processes. Theory predicts that key traits and high trait redundancy – large species richness and abundance supporting the same traits – can buffer communities against environmental disturbances. While experiments and data from simple ecological systems lend support, large‐scale evidence from diverse, natural systems under major disturbance is lacking. Here, using long‐term data from both temperate (English Channel) and tropical (Seychelles Islands) fishes, we show that sensitivity to disturbance depends on communities’ initial trait structure and initial trait redundancy. In both ecosystems, we found that increasing dominance by...
Tipo: Text
Palavras-chave: Climate change; Coral reefs; Diversity stability; Ecological traits; Ecosystem functioning; English Channel; Functional diversity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60184/63525.pdf

Utilisation de la technique vidéo STAVIRO pour l’observation et le suivi des ressources et des écosystèmes récifo-lagonaires de Mayotte. Etude pilote et recommandations pour les suivis futurs
Provedor de dados: 5
Autores: Roman, William; Pelletier, Dominique.
• In order to assess the sustainability of fish resources in the Natural Marine Park of Mayotte (Western Indian Ocean), indicators and monitoring protocols must be determined. • This study relied on the underwater video technique STAVIRO for assessing fish communities and resources. A pilot survey was conducted in Nov. 2014 in the south-east quarter of the Mayotte lagoon, an area encompassing the marine reserves of Longogori, M’Bouzi and the Saziley Marine Park. Out of 115 stations collected, 104 were analysed for habitat and fish, based on a list of 527 species with fishing, ecological, or emblematic interest (cf. AMBIO/A/1). • 43 indicators were computed, analysed, and for some mapped. The PAMPA computing tool was used in this purpose. • 130 fish species...
Tipo: Text
Palavras-chave: Ichtyofaune; Pêche; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Biodiversité; Ecosystème corallien; AMP; Parc Naturel Marin de Mayotte; Océan Indien; Indicateur; Tableau de bord; PAMPA; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Biodiversity; Coral reefs; MPA; Natural Marine Park of Mayotte; Western Indian Ocean; Indicator; Dashboard; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00373/48421/48642.pdf

Utilisation de la technique vidéo STAVIRO pour l’observation et le suivi des ressources et des écosystèmes récifo‐lagonaires de Mayotte. Etude pilote et recommandations pour les suivis futurs. Annexe 1 : Fiches métriques : Influences du statut de pêche, du type géomorphologique et de l’habitat
Provedor de dados: 5
Autores: Roman, William; Pelletier, Dominique; Wickel, Julien; Giannasi, Paul.
• This work deals with coral reef fish resources and communities in the Natural Marine Park of Mayotte, Western Indian Ocean). It relies on remote unbaited underwater video observations, using the STAVIRO rotating technique.  • This document is complementary to the main assessment report:  William Roman and Dominique Pelletier, 2016. The STAVIRO video technique for monitoring fish resources and reef ecosystems in the Natural Marine Park of Mayotte (Western Indian Ocean). Pilot study and recommendations for monitoring. EXPLOCEAN-IFREMER Report.  • It pertains to the assessment of resources with respect to fishing pressure and factors related to local habitat and reef geomorphology. • It comprises the description of the metrics used for the assessment:...
Tipo: Text
Palavras-chave: Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Biodiversité; Ecosystème corallien; AMP; Parc Naturel Marin de Mayotte; Indicateur; PAMPA; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Biodiversity; Coral reefs; MPA; Natural Marine Park of Mayotte; Indicator; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00373/48422/48643.pdf

Community-wide scan identifies fish species associated with coral reef services across the Indo-Pacific
Provedor de dados: 5
Autores: Maire, Eva; Villeger, Sebastien; Graham, Nicholas A. J.; Hoey, Andrew S.; Cinner, Joshua; Ferse, Sebastian C. A.; Aliaume, Catherine; Booth, David J.; Feary, David A.; Kulbicki, Michel; Sandin, Stuart A.; Vigliola, Laurent; Mouillot, David.
Determining whether many functionally complementary species or only a subset of key species are necessary to maintain ecosystem functioning and services is a critical question in community ecology and biodiversity conservation. Identifying such key species remains challenging, especially in the tropics where many species co-occur and can potentially support the same or different processes. Here, we developed a new community-wide scan CWS) approach, analogous to the genome-wide scan, to identify fish species that significantly contribute, beyond the socio-environmental and species richness effects, to the biomass and coral cover on Indo-Pacific reefs. We found that only a limited set of species (51 out of approx. 400, = approx. 13%), belonging to various...
Tipo: Text
Palavras-chave: Ecosystem functioning; Biodiversity; Fish community; Key species; Ecosystem services; Coral reefs.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00452/56388/68019.pdf

Régime alimentaire de poissons carnivores des récifs coralliens de Nouvelle Calédonie
Provedor de dados: 5
Autores: Kulbicki, M; Bozec, Ym; Labrosse, Pierre; Letourneur, Y; Mou-tham, G; Wantiez, L.
A total of 212 carnivorous coastal fish species from New Caledonia, represented by 7335 individuals, were analysed for their diet. Fifty two prey items were identified and later grouped into broader taxonomic categories refered as "prey types". For each fish species 6 biological traits were defined: maximum adult size, major biotope, schooling behaviour, home range, nycthemeral behaviour, degree of crypticity. A general linear model was fit to the diet data taking into account these traits, and depth of capture and fish family. This model was applied to the average number of prey types/stomach and to the volume of 5 prey types: nekton, crustaceans. molluscs, echinoderms, worms. A second analysis was performed on the effect of observed size on diet...
Tipo: Text
Palavras-chave: Coral reefs; Fish diet; Trophic level; Indian ocean.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00608/71965/70663.pdf

New Scleractinian corals (Cnidaria: Anthozoa) from Sabah, North Borneo. Description of one new genus and eight new species, with notes on their taxonomy and ecology
Provedor de dados: 16
Autores: Ditlev, H.
Eight new species and one new genus of Scleractinian corals from Darvel Bay, North-western Borneo are described and illustrated. Enigmopora darveliensis, Acropora ridzwani, Lithophyllon ranjiti, Pectinia crassa, Mycedium spina, Plerogyra multilobata, Plerogyra diabolotus, and Plerogyra cauliformis. The evolutionary and distributional significance of the species is discussed. Borneo’s unique equatorial location and stable geological history are held responsible for its high diversity of corals with a number of unique species. The morphology of Enigmopora darveliensis is discussed and compared to other supposedly primitive extant corals. The endemic status of most of the Plerogyra species, with their unusually large polyps, is due to their narrow ecological...
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Ecology; New species; Biodiversity; Coral reefs; Indo-Pacific; Centre of diversity; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/216143

Pedicularia vanderlandi spec. nov., a symbiotic snail (Caenogastropoda: Ovulidae) on the hydrocoral Distichopora vervoorti Cairns &amp; Hoeksema, 1998 (Hydrozoa: Stylasteridae), from Bali, Indonesia
Provedor de dados: 16
Autores: Goud, J.; Hoeksema, B.W.
A new species of ovulid gastropod is described from Bali as Pedicularia vanderlandi spec. nov. It was predominantly found in shallow water on the stylasterid hydrocoral Distichopora vervoorti Cairns &amp; Hoeksema, 1998. The snails are compared with type specimens of congeneric taxa and with material of Pedicularia pacifica Pease, 1865, which was found in shallow water on an unidentified Stylaster. Various notes on Indo Pacific Pedicularia species are given in an annotated, preliminary check-list. Finally, the host relationships of Pedicularia are discussed in general.
Tipo: Article / Letter to the editor
Palavras-chave: Ovulidae; Pedicularia; Stylasteridae; Distichopora; Stylaster; Symbiotic association; Coral reefs; Bali; Sulawesi; Indonesia; 42.79.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/219449

Biodiversity on the marginal coral reefs of South Africa: What does the future hold?
Provedor de dados: 16
Autores: Schleyer, M.H.; Celliers, L.
Southern African coral communities form a continuum from the more typical, accretive reefs in the tropics of Mozambique to the marginal, southernmost African distribution of this fauna in KwaZulu- Natal. While the latter are limited in size, they are gaining increasing attention as they provide a model for the study of many of the stresses to which these valuable systems are globally being subjected. Soft coral cover, comprising relatively few species, exceeds that of scleractinians over much of the southern reefs, and the coral communities attain a high biodiversity at this latitude on the East African coast. A long-term monitoring programme has revealed small yet significant changes in community structure on the reefs in recent years, concurrent with...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Coral reefs; South Africa; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220567

A hitherto unnoticed adaptive radiation: epitoniid species (Gastropoda: Epitoniidae) associated with corals (Scleractinia)
Provedor de dados: 16
Autores: Gittenberger, A.; Gittenberger, E.
Twenty-two epitoniid species that live associated with various hard coral species are described. Three genera, viz. Epidendrium gen. nov., Epifungium gen. nov., and Surrepifungium gen. nov., and ten species are introduced as new to science, viz. Epidendrium aureum spec. nov., E. sordidum spec. nov., Epifungium adgranulosa spec. nov., E. adgravis spec. nov., E. adscabra spec. nov., E. marki spec. nov., E. nielsi spec. nov., E. pseudolochi spec. nov., E. pseudotwilae spec. nov., Surrepifungium patamakanthini spec. nov., and ‘Epitonium’ crassicostatum spec. nov. and ‘E.’ graviarmatum spec. nov. Although their identities as separate gene pools are convincingly demonstrated by molecular data, some of these species cannot be identified unequivocally on the basis...
Tipo: Article / Letter to the editor
Palavras-chave: Indo-Pacific; Parasites; Coral reefs; Coral/mollusc associations; Epitoniidae; Epitonium; Epidendrium; Epifungium; Surrepifungium; New species; New genera; Scleractinia; Fungiidae; Fungia; 42.73.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/214349

Description and mapping of the coral reefs investigated during the Snellius-II Expedition in Indonesia
Provedor de dados: 16
Autores: Duyl, F.C. van.
Macrohabitat distribution, zonation and morphology of coral reefs in the Flores Sea region were investigated. Descriptions of reefs and reef maps are presented, based on large area surveys and aerial photographs. Diving equipment, underwater scooter, depth recorder and different methods of aerial photography were employed to collect data. The aim of the surveys was to acquire synoptic views of the study areas and to attribute to a uniform classification system applicable to reef mapping throughout the archipelago.
Tipo: Article / Letter to the editor
Palavras-chave: Coral reefs; Flores Sea; Indonesia; Mapping; 42.72.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/318152

The wentletrap Epitonium hartogi spec. nov. (Gastropoda: Epitoniidae), associated with bubble coral species, Plerogyra spec. (Scleractinia: Euphyllidae), off Indonesia and Thailand
Provedor de dados: 16
Autores: Gittenberger, A.
This is the first record of an association between a wentletrap species (Gastropoda: Epitoniidae) and coral species of the Euphyllidae (Scleractinia), i.e. Plerogyra simplex and P. diabolotus. While describing Epitonium hartogi spec. nov., special attention is given to the ontogenetic development within the eggcapsules, the structure and microsculpture of the opercula, the radulae, and the microsculpture on the radular jaws. These characters proved to be at least partly diagnostic in the epitoniid species Epitonium albidum, E. billeeanum, E. costulatum, E. hoeksemai, E. ingridae, E. lochi, E. millecostatum, E. pyramidalis, E. twilae, E. ulu and Nitidiscala tincta. Spiculae-like crystals covering the epitoniid egg-capsules are described; such crystals are...
Tipo: Article / Letter to the editor
Palavras-chave: Indo-Pacific; Parasites; Coral reefs; Coral/mollusc associations; Egg-capsules; Veligers; Epitoniidae; Epitonium; Billeeanum; Hartogi; Larval development; Radulae; Jaws; Euphyllidae; Plerogyra; 42.73; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220301

The mushroom coral as a habitat
Provedor de dados: 16
Autores: Hoeksema, B.W.; Meij, S.E.T. van der; Fransen, C.H.J.M.
The evolution of symbiotic relationships involving reef corals has had much impact on tropical marine biodiversity. Because of their endosymbiotic algae (zooxanthellae) corals can grow fast in tropical shallow seas where they form reefs that supply food, substrate and shelter for other organisms. Many coral symbionts are host-specific, depending on particular coral species for their existence. Some of these animals have become popular objects for underwater photographers and aquarists, whereas others are hardly noticed or considered pests. Loss of a single coral host species also leads to the disappearance of some of its associated fauna. In the present study we show which mushroom corals (Scleractinia: Fungiidae) are known to act as hosts for other...
Tipo: Article / Letter to the editor
Palavras-chave: Coral reefs; Host-specificity; Interspecific associations; Marine biodiversity; Phylogenetic ecology; Stony corals; 42.65.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/431754

Taxonomy, Phylogeny and Biogeography of Mushroom Corals (Scleractinia: Fungiidae)
Provedor de dados: 16
Autores: Hoeksema, B.W.
The Fungiidae are mushroom corals that live in sublittoral habitats in the tropical Indo-Pacific. Their habitats are part of coral reefs or other marine substrata, which usually can be found in the proximity of the reefs. In the present taxonomic revision, the family is divided into 11 genera; one of which, Fungia, is subdivided into seven subgenera. A total of 40 species is described and figured, three of which are new to science. One species is renamed. The stratigraphic distribution is given for all the species recorded in fossil state. A tentative phylogenetic reconstruction down to the species level is given. The cladogram that is provided should be considered a working hypothesis and not a sound basis for a completely revised classification and...
Tipo: Article / Letter to the editor
Palavras-chave: Scleractinia; Fungiidae; Mushroom corals; Taxonomy; Revision; Fossil record; Phy- logeny; Biogeography; Indo-Pacific; Tropical; Marine; Benthic; Shallow-water habitats; Coral reefs; Species diversity.; 42.72.
Ano: 1989
URL: http://www.repository.naturalis.nl/record/317727

Mesophotic mushroom coral records at Brunei Darussalam support westward extension of the Coral Triangle to the South China Sea waters of Northwest Borneo
Provedor de dados: 16
Autores: Lane, D.J.W.; Hoeksema, B.W.
This communication reports the discovery of two additional fungiid coral species, Cycloseris hexagonalis and Lithophyllon spinifer, from a relatively deep shelf reef in Brunei waters. These new records plus two earlier excluded ones, Cycloseris explanulata and C. wellsi, raise the known number of mushroom coral species at this Northwest Borneo location to 37 which is comparable to the number (n=35) reported for reefs of the nearby Tungku Abdul Rahman Park/Kota Kinabalu area, outside but close to the currently recognized northwest boundary of the zone of maximum marine biodiversity, the Coral Triangle (CT). The fungiid species richness at Brunei is compared with those of other sites in this eastern part of the South China Sea (SCS), and the adjacent...
Tipo: Article / Letter to the editor
Palavras-chave: Scleractinia; Fungiidae; Spratly; Coral reefs; Species richness.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/613679

Space partitioning among damselfishes in the Caribbean coast of Panama: the role of habitat preferences
Provedor de dados: 83
Autores: Chaves,Laís de Carvalho Teixeira; Ormond,Carlos Gustavo A; McGinty,Elizabeth S.; Ferreira,Beatrice Padovani.
This study aimed to assess abundance and habitat use by juvenile and adult damselfishes, as much as the benthic cover of different reefs on Isla Colon, Bocas del Toro, Panama. Reefs were selected considering different levels of wave exposure and depths. Damselfish and benthic communities were distinct between reefs. The most abundant species in the sheltered deeper reef was Stegastes planifrons followed by S. leucostictus, and they were also recorded in the sheltered shallower reef. Low densities of S. partitus and S. variabilis were also observed in the sheltered deeper reef, as these species are apparently restricted to higher depths. Additionally, these reefs presented patches with high cover of live and dead massive coral. Shallow depths presented high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bocas del Toro; Coral reefs; Pomacentrid; Reef fish; Territorial herbivores.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300017

Kenya, Reef Status And Ecology
Provedor de dados: 20
Autores: Mwachireya, S.; Uku, J.N.; Mdodo, R.; Obura, D.; Wawiye, P.
Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water...
Tipo: Report
Palavras-chave: Coral reefs; Ecology.
Ano: 2000
URL: http://hdl.handle.net/1834/774

Arrecifes de corales
Provedor de dados: 20
Autores: Ortiz Estévez, R.M.; Serrano Jérez, M.; Rodríguez Atá, R.
Diversidad, orígenes, formación, distribución geográfica, tipos, protección y otros aspectos son abordados de forma didáctica.
Tipo: Book
Palavras-chave: 1463; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2005
URL: http://hdl.handle.net/1834/2082

Culturing Coral for Management
Provedor de dados: 20
Autores: Franklin, H.; Muhando, C. A.
Anthropogenic pressures on the coral reefs of Tanzania are high. Over-exploitation, destructive fishing practices, unplanned tourism and high sedimentation load are amongst the most evident contributing factors whilst the poor economy and increased human population density along the coast is an underlying problem. There is a clear need for alternative sources of livelihood and effective ways to manage coral reef resources sustainably. Mariculture is becoming a common component in coastal zone management in Tanzania.
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 1996
URL: http://hdl.handle.net/1834/992

Condición de los arrecifes coralinos del Parque Nacional Guanahacabibes, Cuba.
Provedor de dados: 20
Autores: Perera-Valderrama, S.; Alcolado, P.M.; Caballero-Aragón, H.; Guardia-Llansó, E.; Cobián-Rojas, D.
En el 2007 se evaluó el estado de salud de los arrecifes coralinos del Parque Nacional Guanahacabibes, Cuba, sobre la base de la condición de las comunidades de corales. Se analizaron indicadores de condición de los corales escleractinios (diámetro máximo, riqueza de especies, enfermedades y mortalidad) a distintas profundidades, en 13 estaciones con diferentes niveles de exposición a los principales fenómenos océano-atmosféricos generadores de oleaje en el área (vientos nortes, sures y alisios). Se identificaron 42 especies de corales pétreos. Las más abundantes fueron: Siderastrea siderea, Montastraea faveolata, Agaricia agaricites y Porites astreoides. El promedio de cobertura de coral vivo varió entre 4.8% y 31.2%, con un promedio general de 17%. El...
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 2013
URL: http://hdl.handle.net/1834/5343

Economics of Coral Reef Restoration
Provedor de dados: 20
Autores: Spurgeon, J.P.G.; Lindahl, U.
This chapter provides an introduction to the economics of coral reef restoration. A comparison of coral restoration schemes from four countries indicates that costs can vary from some US$ 13,000 per ha to over a hundred million US$ per ha. However, it also reveals that cost estimates in the literature are not readily comparable, and that many cost components of restoration are ignored. Little work has been conducted into the potential benefits of coral restoration. This issue is briefly considered with reference to the case studies. The chapter suggests that a benefit–cost analysis approach should be used more often to help assess the justification for coral reef restoration and to improve the efficiency of any such expenditure. It is clear that a greater...
Tipo: Book Section
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/564

Assessment of the extent of damage, socio-economic effects, mitigation and recovery in Tanzania: Proposal
Provedor de dados: 20
Autores: Muhando, C.A.
Coral reefs play a crucial role to the well-being of coastal communities in Tanzania. Coastal fisheries, ecotourism and coastal land protection are, to some extent, sustained by coral reefs. A variety of fish species, spiny lobsters, octopus, sea cucumbers, clams, oysters and turtles form the basis of harvestable reef resources. More than 30% of marine fish landings are harvested on or adjacent to coral reef environment. Coral reefs also support offshore fisheries by providing feeding and nursery grounds for some oceanic (pelagic) fish stocks. Tourism based on coral reef ecosystems is peaking up, creating new opportunities for employment and substantial amounts of income for the people of Tanzania.
Tipo: Report
Palavras-chave: Coral reefs; Socioeconomic development; Http://aims.fao.org/aos/agrovoc/c_29966.
Ano: 2000
URL: http://hdl.handle.net/1834/490

Status Of Coral Reefs In Eastern Africa: Kenya, Tanzania, Mozambique And South Africa
Provedor de dados: 20
Autores: Obura, D.
Eastern African coral reefs were severely impacted by the El Niño Southern Oscillation of 1997-98, with bleaching and mortality levels varying from &lt;1% in South Africa to 80% and greater on reefs in northern Tanzania and Kenya. Recovery of affected reefs to 2002 has been poor to moderate, and patchy. Reefs strongly impacted by the El Niño that had high coral diversity and cover have recovered to less than one quarter of pre-bleaching coral cover. However, some high diversity reefs that escaped the bleaching impacts have remained healthy, with high coral cover and diversity. Degraded reefs outside Marine Protected Areas (MPAs) that were severely damaged by the El Niño have generally recovered to 50-100% of pre-bleaching coral cover. Recruitment of corals...
Tipo: Book Section
Palavras-chave: Coral reefs; El Nino phenomena.
Ano: 2002
URL: http://hdl.handle.net/1834/338

Territorios del pez Stegastes planifrons en formaciones coralinas del Parque Nacional Natural Tayrona, Caribe colombiano: un panorama general
Provedor de dados: 20
Autores: Santodomingo, N.; Rodríguez-Ramírez, A.; Garzón-Ferreira, J.
The pomacentrid Stegastes planifrons is one of the most conspicuous inhabitants of the coral reefs and constitutes an important agent of natural coral mortality. These fishes kill coral directly by removing coral polyps for opening up a space for its algal turfs, which are their main food. The population density, territory and algal turfs areas of Stegastes planifrons were assessed at Chengue and Gayraca bays in Tayrona Natural Park, as a contribution to understand natural processes involved in the coral reef deterioration. During August to November 1999, belt transects (20 x 2 m) were evaluated at four reef habitat types: multispecific coral assemblages dominated by (1) Colpophyllia natans (COLP) or (2) Montastraea spp. (MONT); and monospecific coral...
Tipo: Journal Contribution
Palavras-chave: Territoriality; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2002
URL: http://hdl.handle.net/1834/3125

Status of Coral Reefs in the Red Sea-Gulf of Aden
Provedor de dados: 20
Autores: Hassan, M.; Kotb, M.M.A.; Al-Sofyani, A.A.
The status of coral reefs bordering the Red Sea and Gulf of Aden is generally good, with live hard coral cover averaging 20-50%. There are predominantly fringing reefs bordering the coasts of Djibouti, Egypt, Saudi Arabia, Sudan, and Yemen. Atolls and pinnacle reefs occur mainly in the Central and Southern Red Sea. However, technical reports, personal observations and comparative data show recent decreases in live coral cover. Fish populations are also declining and there have been several small outbreaks of the crownof- thorns starfish (COTS), some local bleaching events and an increase in bioeroding organisms such as the urchin Diadema setosum and the coral eating gastropods Drupella and Coralliophila. Threats to coral reefs differ within the region, and...
Tipo: Book Section
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/389

A preliminary assessment of coral bleaching in Mozambique
Provedor de dados: 20
Autores: Schleyer, M.; Obura, D.; Motta, H.; Rodrigues, M.J.
The 1997-1998 El Niño southern oscillation caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical fisheries and marine ecotourism. They represent one of Mozambique’s main coastal assets, and coastal communities and the growing tourism industry rely mainly on reef-based resources. Today, about 6.6 million people live within Mozambique’s 48 coastal administrative districts. This represents 42% of the current population (15.7 million), which is expected to grow at 3% p.a. (INE, 1998). In 1994, the population density in coastal districts was 28 persons/km2. In 1996, much higher densities were recorded in the coastal...
Tipo: Report
Palavras-chave: Coral reefs; El Nino phenomena.
Ano: 1999
URL: http://hdl.handle.net/1834/489

Condición del bentos de los arrecifes  coralinos de Santa Lucía (nordeste de Cuba) antes y después del paso del huracán Ike.
Provedor de dados: 20
Autores: Busutil, L.; Hansel Caballero, H.; Hidalgo, G.; Alcolado-Prieto, P.; Alcolado, P. M.
Se determinó la condición del bentos de los arrecifes coralinos del polo turístico Santa Lucía (nordeste de Cuba) antes y después del paso del Huracán Ike, a partir de indicadores biológicos de la metodología AGRRA. Se evidenció un gran deterioro de la cresta arrecifal desde el primer muestreo. El arrecife frontal  presentó mejores condiciones que la cresta, fundamentalmente hacia el este y hacia las mayores  profundidades. Los valores bajos de la densidad de corales, la cobertura viva de coral y del reclutamiento  de corales, así como la gran cobertura de macroalgas fueron las variables más críticas. La incidencia de  enfermedades microbianas y de blanqueamiento de corales fue baja. Las causas más importantes de  afectación al arrecife coralino muestran...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2011
URL: http://hdl.handle.net/1834/4049

Coral Transplantation and Restocking to Accelerate the Recovery of Coral Reef Habitats and Fisheries Resources Within No-Take Marine Protected Areas: Hands-On Approaches to Support Community-Based Coral Reef Management
Provedor de dados: 20
Autores: Bowden-Kerby, A.
Of the planet’s 600,000 km2 of coral reefs (Jameson et al., 1995), roughly 70-80% are located in developing countries. Many of these reefs are owned or controlled by indigenous fishing communities rather than national or state governments. These rural fishing communities are a primary force of destruction to coral reefs on a global scale (Wilkinson, 1998), therefore their involvement in the management and conservation of coral reefs will be an essential part of reversing coral reef decline....
Tipo: Report
Palavras-chave: Ecosystem management; Coral reefs; Fishery resources.
Ano: 2003
URL: http://hdl.handle.net/1834/849

Status of the Coral Reefs of Maldives after the Bleaching Event in 1998
Provedor de dados: 20
Autores: Zahir, H.
A pilot reef monitoring study was conducted in 1998 to assess the extent of coral bleaching in the Maldives. The aims of this monitoring exercise were: 1. To quantitatively document the post-bleaching status of the shallow-water coral communities on the reefs of the north, central and southern regions of Maldives. 2. To estimate bleaching-induced coral mortality by comparing data yielded by the pilot survey with data from previous surveys, especially those sites for which historical data are available.
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/432

Coral Bleaching in the Indian Ocean Islands: Ecological Consequences and Recovery in Madagascar, Comoros, Mayotte and Reunion.
Provedor de dados: 20
Autores: Bigot, L.; Quod, J.P.
During the period from January to August 1998, the largest coral bleaching event and subsequent mortality ever recorded had a huge ecological impact on coral reefs throughout the Indian Ocean. This event corresponded to increased seawater temperatures due to an ENSO phenomenon (Wilkinson, 1998). The full extent of the socio-economic impacts will depend on the recovery capacity of corals which, in many locations, are seriously threatened by human activities. This study documents the ecological status and recovery of corals reefs from theComoros archipelago (Comoros, Mayotte, Geyser), Madagascar and Réunion which were affected by the bleaching from January to August 1998. The impact of the bleaching at each location varies in its extent in time and severity.
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/476

Conservation of Coral Reefs after the 1998 Global Bleaching Event
Provedor de dados: 20
Autores: Hayes, R.L.; Goreau, T.J.; McClanahan, T.R.
Large-scale coral bleaching has happened repeatedly in the Pacific and Indian oceans and the Caribbean since 1982. Previously it was observed only on a small scale (Williams and Bunkley- Williams 1990;Jokiel &amp; Coles 1990; Glynn 1988, 1991; Goreau et al. 1993; Goreau &amp; Hayes 1994, 1995). The 1998 bleaching event was globally the most extensive such event recorded except in the Caribbean and Central Pacific where a comparison of year-byyear temperature and bleaching maps show that it was comparable with the largest previous events (T.G. et al., unpublished data). Global analyses of coral bleaching are rare, but critical to an understanding of the widespread ecological effect of bleaching events.
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/416

Annual skeletal extension of two reef-building corals from the Colombian Caribbean Sea
Provedor de dados: 20
Autores: Charry, H.; Alvarado, E.M.; Sánchez, J.A.
The skeletal growth of the scleractinian corals Diploria labyrinthiformis (Linnaeus 1758) and Montastraea annularis (Ellis and Solander 1786) from Isla Grande (north of Rosario islands), Colombian Caribbean, was determined from annual extension increments revealed by X-radiography of 4-6 mm thick slabs obtained along the axis of maximum growth. The skeletal extension average rate for the last 22 years for D. labyrinthiformis was 3.8 mm year-1 (SE 0.10; N = 87). The correlation between growth of D. labyrinthiformi s and hours of sunlight was significantly negative. The annual variances of sunlight enhanced annual statistically significant differences of growth in this species. M. annularis showed an average extension growth of 10.6 mm year-1 (SE 0.32; N =...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Coral reefs; Coral reefs; Growth rate; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_16130.
Ano: 2004
URL: http://hdl.handle.net/1834/3077

Efectos de un inusual periodo de alta frecuencia de huracanes sobre el bentos de arrecifes coralinos.
Provedor de dados: 20
Autores: Alcolado, P. M.; Hernández Muñoz, D.; Caballero, H.; Busutil, L.; Perera, S.; Hidalgo, G.
En arrecifes coralinos del suroeste de Cuba, se evaluaron los impactos de la inusitada frecuencia e intensidad de huracanes entre el 2001 y el 2007, y de las enfermedades de corales, ambos factores asociados al cambio climático. En las crestas arrecifales, la reducción de la cobertura de coral duro vivo varió de nula a 21%, mientras que la reducción del diámetro máximo promedio de los corales varió de 16 a 40 cm. En los arrecifes frontales, la reducción de la cobertura de coral varió de nula a 14%, mientras que la reducción del diámetro máximo promedio varió de nula a 26 cm. Sin embargo, en todos los sitios se observaron grandes cambios en el predominio numérico de las especies. En las crestas, este se desplazó de Acropora palmata y otros corales duros a...
Tipo: Journal Contribution
Palavras-chave: 1462; Hurricanes; Weather; Diseases; Coral reefs; Hurricanes; Weather; Coral reefs; Diseases; Http://aims.fao.org/aos/agrovoc/c_11650; Http://aims.fao.org/aos/agrovoc/c_15292; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_49879.
Ano: 2009
URL: http://hdl.handle.net/1834/4094

Spatial and temporal distribution of reef fish spawning aggregations in the Seychelles – an interview-based survey of artisanal fishers
Provedor de dados: 20
Autores: Öhman, M.C.; Isidore, M.; Payet, R.J.; Robinson, J.; Marguerite, M.A.
Many coral reef fish species aggregate at specific times and locations for the purpose of spawning. This study examined the spatial and temporal distribution of spawning  aggregations in the Seychelles. An interview-based survey of the principal stakeholders, mainly artisanal fishers, yielded 89 reports of aggregation fishing for 26 demersal and semi-pelagic fish species. Grouper aggregations were largely concentrated in the outer coralline islands of the exclusive economic zone, whilst those of snappers and rabbitfishes were mainly reported from locations on the Seychelles Bank. The spatial patterns among fish families were attributed to a combination of differences in species abundance and distribution as well as variation in fishing effort. Spawning...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Reef fish; Spawning.
Ano: 2004
URL: http://hdl.handle.net/1834/1142

Long-term Trends in Coral Reef Fish Yields and Exploitation Rates of Commercial Species from Coastal Kenya
Provedor de dados: 20
Autores: Kaunda-Arara, B.; Rose, G.A.; Muchiri, M.S.; Kaka, R.
Analysis of long-term (1978–2001) marine fisheries data showed that Kenyan coralreefs produced an estimated 2–4 metric t/km2/year of demersal fish. A rapid overall decline in landings occurred during the 1990s. Yields (t/km2/year) showed bimodal peaks in 1982 (2.98) and 1991 (2.90). The average total landings dropped by 55% during the last decade following peak landings in 1982. Landings of the commercially important families (e.g., Siganidae, Lethrinidae, Lutjanidae and Serranidae) declined by about 40% during the last decade, with the groupers (Serranidae) showing the steepest (72%) decline. Analysis of landings per administrative district showed a 78% decline in the densely populated Mombasa district between the periods 1983–1991 and 1992–2001. The less...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Reef fish.
Ano: 2003
URL: http://hdl.handle.net/1834/959

Coral Reef Resources of East Africa: Kenya, Tanzania and the Seychelles
Provedor de dados: 20
Autores: Kimani, E.N.
Coral reefs are a prominent feature of the East African coastline and associated islands. The Kenya-Tanzania coastline stretches from 1°30'S, at the Somali border to approximately 10°S at the Mozambique border. The Seychelle Islands extend from 5°S to 10°S and 45°E to 56°E (Fig. 1). The climate along the East African coast is dominated by seasonal monsoon winds (northeast monsoon from No-vember to February and southeast monsoon from March to October) and the equatorial currents dictated by the intertropical convergence zone. The narrow East African continental shelf supports fringing and patch reefs which lie 0.5 to 2 km offshore. General profiles of East African coasts are given in Table 1. Gaps in the reefs occur near river mouths notably Tana, Athi and...
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 1995
URL: http://hdl.handle.net/1834/633

Proceedings of the INCO-DEV International Workshop on Policy Options for the Sustainable Use of Coral Reefs and Associated Ecosystems
Provedor de dados: 20
The present report contains the proceedings of the INCO-DEV International Workshop on “Policy Options for the Sustainable Use of Coral Reefs and Associated Ecosystems” convened in Mombasa, Kenya, 19-22 June 2000. It was convened to address issues associated with the ongoing degradation of coral reefs and associated ecosystems. This degradation takes place inspite of an impressing body of research results and and increasing number of technical solutions becoming available. Policy options for the sustainable use are only feasible if they allow reconciling the requirements of conservation with the economic and social demands of the people relying on these natural resources. By its very nature this challenge of managing coral reef ecosystems sustainably calls...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs; Sustainability.
Ano: 2001
URL: http://hdl.handle.net/1834/293

Habitat heterogeneity effects on macro- and meiofauna (especially  nematodes) in Punta Francés coral reef (SW Cuban Archipelago)
Provedor de dados: 20
Autores: Armenteros, M.; Ruiz-Abierno, A.; Sosa, Y.; Pérez-García, J. A.
Benthic macrofauna and meiofauna distribution patterns were  described in a tropical coral  reef (Punta Francés, Cuban  Archipelago, Caribbean Sea). Density and main taxa composition for macrofauna and meiofauna and species diversity and  organismal traits for free-living nematodes were compared among four habitats: seagrass bed, sand flat, dead coral and hard  bottom. Strong spatial patterns of distribution across habitats were detected and explained by a complex combination of  habitat features. Signal/noise ratio for macrofauna data of distribution was enough strong to detect changes across habitats  but the sizes of sampling devices were not adequate to represent the real patterns in the nature. Meiofauna patterns of  distribution were driven by the...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Distribution; Diversity index; Macrofauna.
Ano: 2012
URL: http://hdl.handle.net/1834/4552

Coral reef degradation in the Indian Ocean. Status reports and project presentation 2000
Provedor de dados: 20
The temperatures of the world’s oceans are increasing at an accelerating rate. Recent estimates indicate that the magnitude of these increases might be as much as several degrees over the next century and undoubtedly, the impacts of these changes on the Earth’s ecosystems are likely to become increasingly obvious. Coral reefs have already shown dramatic responses to the increasing ocean temperatures. Under normal temperature conditions, reef-building corals, which form the foundation of coral reefs, are living very near the maximum sea temperatures that they can tolerate. If they are exposed to even modest increases in sea temperatures, perhaps only 1° C - 2° C, they become stressed and often ‘bleach’. This bleaching of corals is a response to stress, and...
Tipo: Report
Palavras-chave: Coral reefs; Degradation.
Ano: 2000
URL: http://hdl.handle.net/1834/309

Efecto acumulativo de agentes estresantes múltiples sobre  los corales hermatípicos de la región noroccidental de Cuba
Provedor de dados: 20
Autores: González Díaz, S. P.
En las últimas décadas ha ocurrido un deterioro acelerado de los arrecifes de coral debido al  efecto sinérgico de impactos naturales y antrópicos. En consecuencia, el objetivo de la tesis  es evaluar los efectos acumulativos producidos por agentes estresantes múltiples y que  impactan de forma simultánea los corales hermatípicos. Para ello se estimaron indicadores  ecológicos en los niveles de comunidad y población. Los resultados obtenidos en esta  investigación evidencian cambios en la estructura de las comunidades de corales que se  asocian con el impacto antrópico directo existente a lo largo de la costa noroccidental de  Cuba y que disminuye en la dirección este-oeste. Los indicadores ecológicos referidos a las  tallas de los corales, muestran...
Tipo: Theses and Dissertations
Palavras-chave: Coral reefs; Agents; Sedimentation; Eutrophication.
Ano: 2010
URL: http://hdl.handle.net/1834/5385

Evaluación de las comunidades de corales y peces de algunos arrecifes de la Isla La Tortuga y cayos adyacentes, Venezuela
Provedor de dados: 20
Autores: del Mónaco, C.; Narciso, S.; Alfonso, F.; Gimenez, E.; Bustillos, F.
La mayoría de los arrecifes coralinos de la isla La Tortuga se encuentran muy deteriorados con una baja abundancia de coral vivo y baja diversidad de especies coralinas. Los objetivos de este estudio fueron evaluar la estructura comunitaria de los arrecifes coralinos y la comunidad de peces de la isla La Tortuga y cayos adyacentes en las localidades Boca de Palo, Los Tortuguillos, Boca de Palo, Boca de Cangrejo y Los Chaguaramos. En cada localidad se seleccionaron 3 profundidades: 3, 6 y 10 m donde se evaluaron las coberturas coralinas de cada especie coralina en 12 cuadratas de 1 m2 por profundidad. Para evaluar la abundancia y diversidad de peces se utilizó el método AGGRA. Se observó una alta variabilidad espacial en la cobertura coralina entre las...
Tipo: Journal Contribution
Palavras-chave: Abundance; Reef fish; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2010
URL: http://hdl.handle.net/1834/3833

Impacts Of Bleaching On Coral Communities On Artificial Reef Structures In Maldives
Provedor de dados: 20
Autores: Clark, S.
A research programme to evaluate the feasibility of using artificial reef structures (ARS) to rehabilitate degraded reefs was conducted in Maldives between 1990-1994. Detailed monitoring and analysis of coral recruitment patterns on the ARS over a period of 3.5 years demonstrated that a diverse community of branching corals developed within three years with a similar composition to adjacent reef flats. A warm water anomaly of +3° C occurred in Maldives between late April and May1998 resulting in extensive bleaching of corals and other zooxanthellate reef invertebrates. On the ARS bleaching was followed by full to partial mortality of certain corals within 4 - 6 weeks of the onset of bleaching. Branching species of the genera Acropora and Pocillopora were...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/486

Coral reefs of Gorgona Island, Colombia, with special reference to corallivores and their influence on community structure and reef development
Provedor de dados: 20
Autores: Glynn, P.W.; Prahl, H. von; Guhl, F.
Este estudio presenta un breve resumen de la estructura y distribución de los arrecifes coralinos de la Isla de Gorgona. Se  investigaron los organismos coralivoros, comparándolos con los de otras localidades del Pacifico Americano; de esta forma se establece un criterio, para conocer las diferencias regionales y las interacciones bióticas sobre las diferentes comunidades coralinas.  La Isla de Gorgona se localiza hacia el excremo sur de la provincia de Panamá panamá Bight), distante unos 30 km de la franja costera aluvial, lo que la aleja considerablemente del efecto directo de afloramientos y derrames de agua dulce, provenientes de los ríos costeros. El equinodermo asteroideo, Acanthaster, que es uno de los coralivoros que mas estragos causa en las...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Geographical distribution; Population structure; Coral reefs; Geographical distribution; Population structure; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 1982
URL: http://hdl.handle.net/1834/3968

Corales de los arrecifes cubanos
Provedor de dados: 20
Autores: Duarte-Bello, P. P.
Se describen 37 especies de corales de los arrecifes cubanos, incluye ilustraciones y características distintivas.
Tipo: Book
Palavras-chave: Coral; Taxonomy; Coral reefs.
Ano: 1961
URL: http://hdl.handle.net/1834/4601

Reef Systems of the Islands of the Southern Seychelles
Provedor de dados: 20
Autores: Spencer, Tom; Teleki, Kristian.
There are 74 coralline islands in the Southern Seychelles, from which representative reefs have been selected for this report, comprising an atoll (Alphonse), a raised platform island (St Pierre), a carbonate bank (Providence-Cerf) and a drowned atoll (Cöetivy) (Figure 1). Aldabra Atoll is treated in a separate section in this publication (see Teleki et al., this volume). Qualitative observations of reef morphology, coral community composition and reef health in the southern Seychelles were made between March and May 1998 (Southern Seychelles Atoll Research Programme - SSARP), February and March 1999 (Thalassi/Shoals of Capricorn Expedition) and November 1999 (Aldabra Marine Programme – AMP). These observations were supplemented by quantitative...
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2001
URL: http://hdl.handle.net/1834/472

The Status of the Aldabra Atoll Coral Reefs and Fishes Following the 1998 Coral Bleaching Event
Provedor de dados: 20
Autores: Teleki, Kristian; Downing, N.; Stobart, B.; Buckley, R.
It is important to establish benchmark reef locations that are remote from centres of human activity and free from anthropogenic disturbances, against which human impacts elsewhere can be assessed and rates of recovery evaluated. Aldabra Atoll in the southern Seychelles, is free of anthropogenic disturbances and an ideal location in which to study reefs and adjacent ecosystems. It has further significance with it being in the middle of a region which has been classified as having a number of reefs at high risk (Bryant et al., 1998) and has been designated as a UNESCO World Heritage site.
Tipo: Preprint
Palavras-chave: Coral reefs; Reef fish.
Ano: 2000
URL: http://hdl.handle.net/1834/451

Ficoflora de los arrecifes coralinos del archipiélago Sabana-Camagüey, Cuba
Provedor de dados: 20
Autores: Zúñiga-Ríos, D.; Martínez-Daranas, B.; Alcolado, P. M.
Para obtener una primera aproximación al conocimiento de las comunidades de macroalgas de los arrecifes de coral del archipiélago Sabana–Camagüey, se realizaron muestreos en 10 perfiles a lo largo del gradiente de profundidad, ubicados en los arrecifes de borde de plataforma de los cayos Sabinal, Guajaba, Confites, Coco, Paredón del Medio, Oeste de cayo Guillermo, Caimán Grande, Francés, Fragoso y Esquivel. En cada perfil se tomaron muestras de algas en cuatro estaciones situadas en la zona trasera del arrecife a 1 m de profundidad, y en el arrecife frontal a 5, 10 y 20 m de profundidad. Estas fueron tomadas con un colector hidroneumático circular de 0.07 m2 de área. Se encontraron 130 especies de algas. La mayor riqueza de especies se presentó en las...
Tipo: Journal Contribution
Palavras-chave: Algae; Biomass; Coral reefs; Algae; Biomass; Coral reefs.
Ano: 2012
URL: http://hdl.handle.net/1834/4589

Status Of Coral Reefs In The South West Indian Ocean Island Node: Comoros, Madagascar, Mauritius, Reunion And Seychelles
Provedor de dados: 20
Autores: Bijoux, J.; Moyne-Picard, M.; Paupiah, N.; Ahamada, S.; Meunier, S.; Maharavo, J.; Bigot, L.
A regional monitoring network of the GCRMN was formed just after the major coral bleaching event in 1998. The goal was to assist the Comoros, Madagascar, Mauritius, Reunion and Seychelles manage their reef resources within the Regional Environment Programme of the Indian Ocean Commission. The Node is now being financed for 3 years by the Global Environment Facility (GEF and World Bank) and the European Union to continue coral reef monitoring to strengthen the capacity of national networks to provide data and advice for resource management. The extent of monitoring has increased from 43 stations in 1999/2000 to more than 70 stations in 2002, with more than 20 stations in Marine Protected Areas (MPAs). The trend on Comoros is for considerable coral...
Tipo: Book Section
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/366

Dynamics Of Drupella Cornuspopulations On Kenyan Coral Reefs
Provedor de dados: 20
Autores: McClanahan, T.R.
In the central Pacific and western Australia the coral-eating snail Drupella cornus has been reported to exhibit large population increases or 'outbreaks' (&gt;10 snails/m2) that result in the loss or devastation of their coral prey. In Kenya, a large population increase of Drupella cornus was recorded from the early 1990's where D. cornus increased from a rare species in the mid 1980's to among the most common prosobranch snail by 1995 (~0.2 snails/m2). Population increases were most commonly observed in a section of reef that had experienced heavy fishing and loss of the durophagous predators such as triggerfish, but still maintained a high abundance of the branching coral Porites nigrescens. In unfished reefs, the population increases of D. cornus were...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs.
Ano: 1997
URL: http://hdl.handle.net/1834/634

Informe faunístico y florístico de las Islas del Rosario en la Costa Norte de Colombia
Provedor de dados: 20
Autores: Werding, B.; Sánchez, H.
Las formaciones coralinas muestran en el lado norte de la Isla Grande en Isla del Tesoro y del Rosario formación de arrecifes de barrera con dominancia de Acropora palmata, Acropora cervicornis y Porites porites hacia la Isla y la formación de praderas de Thalassia testudinum, y sobre ella, zonas de manchas de corales formadas por Diploria, Porites astreoides, Millepora, Agaricia tenuifolia, Sidesrastrea, etc. En algunos lugares se forman pequeños manglares, seguidos por extensas plataformas de Porites porites.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Ecological zonation; Coral reefs; Ecological zonation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2465.
Ano: 1979
URL: http://hdl.handle.net/1834/3936

Las Scleractinia y Milleporina de las Islas del Rosario
Provedor de dados: 20
Autores: Pfaff, R.
Las Islas del Rosario se encuentran a 29 millas del suroeste de Cartagena, Colombia/Suramerica. Son de origen reciente y su edad no pasa mucho de 10000 años. Las Islas; la Periquito, la Arenas, la Rosario y la Tesoro, rodean en una distancia de una a dos millas a la Isla Grande. Esta, la principal, se encuentra entrecortada de sur a norte por caños en los cuales las aguas empujan casi todo el año en dirección hacia el norte. Todas las islas están rodeadas de arrecifes coralinos. Hasta ahora el autor encontró 48 especies y variaciones de Scleractinias y 3 Milleporas. Las condiciones ecológicas de las Islas del Rosario favorecen un crecimiento vigoroso de arrecifes.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Islands; Coral reefs; Islands; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_3962.
Ano: 1969
URL: http://hdl.handle.net/1834/3298

Anakao fringing reef system: biodiversity and anthroprogenic impacts
Provedor de dados: 20
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2003
URL: http://hdl.handle.net/1834/897

Variación espacial en comunidades de esponjas de la costa oriental de Bahía de Cochinos, Cuba
Provedor de dados: 20
Autores: Caballero, H.; Busutil, L.; García, Y.; Alcolado, P.M.
The sponge communities at four locations on the east coast of Bahía de Cochinos were surveyed in October 2002. At each location, sampling sites were established in the ecological zones of patch reef (3 m), shallow terrace (6-10 m), and deep terrace (15 m). The line-transect method with a 10 m line as sampling unit was used to measure sponge bottom coverage, and a 1 m square grid was used to quantify sponge community density. Species heterogeneity and species richness indices showed variability among sites and tended to increase with depth. Thirty species belonging to 19 families and 21 genera were found. The most common species were: Mycale laevis, Aplysina cauliformis, Cliona aprica, Aplysina fistularis, and Ectyoplasia ferox, which comprised 48% of the...
Tipo: Journal Contribution
Palavras-chave: Sponges; Aquatic communities; Coral reefs; Aquatic communities; Coral reefs; Sponges; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_7321.
Ano: 2009
URL: http://hdl.handle.net/1834/3523

Enfermedades coralinas y su investigación en los arrecifes colombianos
Provedor de dados: 20
Autores: Gil-Agudelo, D.L.; Navas-Camacho, R.; Rodríguez-Ramírez, A.; Reyes-Nivia, M.C.; Bejarano, S.; Garzón-Ferreira, J.; Smith, G.W.
Los arrecifes coralinos, uno de los más bellos e importantes ecosistemas de nuestro planeta, han existido por más de 200 millones de años, sobreviviendo a grandes cambios durante su historia (glaciaciones, extinciones masivas, entre otros). Sin embargo, durante las últimas tres décadas se han registrado grandes y súbitos cambios en el medio marino que a juicio de algunos investigadores ponen en peligro la supervivencia de corales y arrecifes coralinos. Uno de los mayores problemas que enfrentan los arrecifes coralinos hoy en día es la aparición de enfermedades que atacan a los corales, la base de estos ecosistemas. No existe un concenso sobre si estas enfermedades son realmente nuevas o no, pero lo que sí se sabe es que algunas de ellas están creando...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Mortality; Coral reefs; Mortality; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2009
URL: http://hdl.handle.net/1834/3616

Evaluación ecológica de los arrecifes coralinos del oeste de Cayo Largo del Sur, Cuba: 1998-1999
Provedor de dados: 20
Autores: Alcolado, P.M.; Claro-Madruga, R.; Martínez-Daranas, B.; Menéndez-Macía, G.; García-Parrado, P.; Cantelar, K.; Hernández, M.; Valle, R.
Cayo Largo del Sur, located in the southwest of Cuba south of the Gulf of Batabanó, is a beach and diving resort, far from the main island of Cuba and from Isla de la Juventud. Therefore, it is far from important permanent human settlements and from all agricultural and industrial development. However its western reefs are suffering a gradual deterioration process. Great scarcity of mesoherbivores (sea urchin Diadema antillarum, as well as scarid and acanthurid fishes), and high nutrient concentrations were observed. As a consequence, an excessive algal and cyanobacterial mat proliferation occurred. It has been reinforced by high temperatures in 1998 and by the simplification of bottom relief because of coral mortality caused by diseases and cyclones. The...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2001
URL: http://hdl.handle.net/1834/3183

Kenya, Reef Status and Ecology
Provedor de dados: 20
Autores: Mdodo, R.; Uku, J.N.; Obura, D.; Wawiye, P.; Mwachireya, S.
Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water...
Tipo: Other
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/433

Benthic communities and geomorphology of the Tesoro Island Coral Reef, Colombian Caribbean
Provedor de dados: 20
Autores: Sánchez-M., Juan M.
The benthic communities distribution in Tesoro Island (Colombian Caribbean) coral reef was determinad by cartography of reef morphology and functional groups from aerial photographs, theodolite triangulation, and bottom transects over depths ranging from O to 30 m. Tesoro Island is a sand cay reef developed over an emerged reef platform whose basal cone possibly originated by mud diapirism on the continental shelf. The benthic communities are distributed as subzones of the geomorphologic units. The reef crest lies along the breaker zone, formed by Millepora spp. buttresses covered on their tops by Palythoa spp. and seawardly by a turf of Dictyota spp. The rear reef (varying from 0.5-1.5 m ¡n depth) is composed of pavement and grooves with live Porites...
Tipo: Journal Contribution
Palavras-chave: Ecology; Benthos; Outer continental shelf; Coral; Algae; Surf; Cartography; Condition factor; Aerial photography; Geomorphology; Coral reefs; Ecology; Benthos; Aerial photography; Coral reefs; Algae; Cartography; Geomorphology; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_8634; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_258; Http://aims.fao.org/aos/agrovoc/c_1344; Http://aims.fao.org/aos/agrovoc/c_3233.
Ano: 1995
URL: http://hdl.handle.net/1834/3803

Coral Reefs: Their Functions, Threats and Economic Value
Provedor de dados: 20
Autores: Cesar, H.S.J.
Coral reef ecosystems provide many functions, services and goods to coastal populations, especially in the developing world. A variety of anthropogenic practices threatens reef health and therefore jeopardises the benefits flowing from these services and goods. These threats range from local pollution, sedimentation, destructive fishing practices and coral mining to global issues like coral bleaching. Economic valuation can help to shed light to the importance of the services and goods by ‘getting some of the numbers on the table’. Valuation techniques are discussed and a summary of economic studies on coral reefs is presented. The concepts of Total Economic Value and Cost Benefit Analysis are used to illustrate the valuation of marine protected areas...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/557

Thermochemistry of strontium incorporation in aragonite from atomistic simulations
Provedor de dados: 20
Autores: Grau-Crespo, R.; Ruiz-Hernández, S. E.; Ruiz-Salvador, A. R.; De Leeuw, N. H.
We have investigated the thermodynamics of mixing between aragonite (orthorhombic CaCO3) and strontianite (SrCO3). In agreement with experiment, our simulations predict that there is a miscibility gap between the two solids at ambient conditions. All SrxCa1 xCO3 solids with compositions 0.12 &lt; x &lt; 0.87 are metastable with respect to separation into a Ca-rich and a Sr-rich phase. The concentration of Sr in coral aragonites (x   0.01) lies in the miscibility region of the phase diagram, and therefore formation of separated Sr-rich phases in coral aragonites is not thermodynamically favorable. The miscibility gap disappears at around 380 K. The enthalpy of mixing, which is positive and nearly symmetric with respect to x = 0.5, is the dominant...
Tipo: Journal Contribution
Palavras-chave: 1246; Aragonite; Coral reefs; Thermodynamic activity; Strontium; Strontium.
Ano: 2010
URL: http://hdl.handle.net/1834/4103

Private Sector Management of Marine Protected Areas: The Chumbe Island Case
Provedor de dados: 20
Autores: Riedmiller, S.
The number of privately managed Marine Protected Areas (MPAs) is small but increasing. Chumbe Island Coral Park (CHICOP), established in 1991 and possibly the first fully functioning MPA in Tanzania, provides an interesting illustration of issues that arise with the instalment of a privately created and managed protected area. Challenges caused by the legal and institutional environment for private investment in conservation resulted in much higher costs than originally anticipated. The history of CHICOP, management experiences, problems and achievements in the legal and institutional environment of Zanzibar, Tanzania are described and lessons learned are summarised. Management costs of the privately established and managed park are only a fraction of what...
Tipo: Book Section
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/566

Sesgos asociados a censos visuales de peces arrecifales en el Pacífico Oriental Tropical: implicaciones del uso de transectos sencillos de tamaño mixto, de la experiencia de los buzos y de la estimación de la talla
Provedor de dados: 20
Autores: Palacios, María del Mar; Zapata, Fernando A.
Los censos visuales en transectos de banda implementados para evaluar las poblaciones de peces arrecifales en el Pacífico Oriental Tropical (POT) varían mucho en el tamaño de las unidades de muestreo y en los protocolos de censo. Para examinar los efectos de tal variación sobre los estimativos de riqueza y densidad de especies, y contribuir a identificar un protocolo apropiado (exacto, preciso y eficiente), se compararon dos métodos de transectos de banda: un transecto de tamaño sencillo (una sola banda de 30 x 2 m) y uno de tamaño mixto (dos bandas, una de 50 x 5 m para peces grandes y móviles, y una de 50 x 1 m para peces pequeños o crípticos). Tres observadores con diferente experiencia en censos visuales realizaron 72 censos en tres transectos fijos en...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Marine fish.
Ano: 2011
URL: http://hdl.handle.net/1834/4418

Coral Recovery From Bleaching in Seychelles
Provedor de dados: 20
Autores: Goreau, T.J.
Digital video transects were filmed at nine coral reef locations around Mahe in March 1997, and at 14 locations including additional sites in Curieuse, Coco, La Digue, and Cousin in May1998 as part of at he Seychelles Marine Park Authority Monitoring program. This report describes preliminary observations made at 16 locations, including most of the previous sites and some new ones during early December1998. The first series of videos recorded the condition of the coral reef prior to the impact of coral bleaching, the second recorded conditions during the intense coral bleaching event of early 1998, and the current observations record conditions in the aftermath of the event, allowing the first accurate estimates of overall mortality and survivorship and of...
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 1998
URL: http://hdl.handle.net/1834/283

The Assessment of Water Quality and Pollution in Tanzania
Provedor de dados: 20
Autores: Mohammed, S.M.
The coastal area of Tanzania (Fig. 1) encompasses a number of habitats that include coral reefs, mangroves, seagrass beds, sand banks, wetlands and beaches, among others. In addition to being essential linkages in the overall functioning of the coastal area, these coastal habitats support various resources both living and non-living. In addition, for generations the coastal area has provided life support to coastal communities where such activities as fisheries and related activities have played an important role in the social and economic development of local communities. In recent years, coastal tourism and mariculture have immerged as being potentially among most important economic activities nationally. The well being of these habitats and resources...
Tipo: Preprint
Palavras-chave: Coral reefs; Mangroves; Seagrass; Wetlands; Beaches; Water quality; Pollution.
Ano: 2000
URL: http://hdl.handle.net/1834/183

Notes on the distribution, habitats and morphology of Stylaster roseus (Pallas 1766) (Hydrozoa: Stylasterina) in the Colombian Caribbean
Provedor de dados: 20
Autores: Sanchez-M., Juan A.; Navas-S., Gabriel R.
Stylaster roseus en el Caribe colombiano es un común habitante de sus arrecifes coralinos, exceptuando la región de Santa Marta y la Guajira. S. roseus es una especie críptica que tiende a ubicarse en sitios sombreados, generalmente bajo o entre ramas de coral muerto o vivo. Se le observó entre esqueletos de Acropora palmata (2-6 m), sobre las partes laterales e internas de pináculos de Millepora (0.5-3 m), bajo tejados de Montastraea annularis y Agaricia spp. (15-30 m), y sobre embarcaciones hundidas (5-20 m). Adicionalmente se encontró creciendo sobre tejido vivo de Millepora. No se encontraron diferencias en las medidas promedio de colonias de habitáis similares. La coloración más común fue tronco blanco y ramas púrpura, seguida por la púrpura uniforme....
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Plant morphology; Coral reefs; Plant morphology; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_13434.
Ano: 1994
URL: http://hdl.handle.net/1834/3794

Consequences of the 1998 Coral Bleaching Event for the Islands of the Western Indian Ocean
Provedor de dados: 20
Autores: Quod, J.P.
Coral reefs are vital for coastal populations and for human activities in general, as they provide people both with living resources and with "services" such as shore protection, sand accretion and coastal tourism. The coral bleaching event of 1997-1998 summer is the most geographically wide spread and severe ever recorded. In the Indian Ocean, warm waters migrated from the South to the North during the first six months. As temperature stress was extreme and/or prolonged, mortality was catastrophically high in many areas (Kenya, Comoros, Seychelles, Tanzania, Maldives), the amount of dead corals ranging from 50-90%. Therefore, ITMEMS (International Tropical Marine Ecosystems Management Symposium) held in Townsville on 24 november 1998 recommended that a...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 1999
URL: http://hdl.handle.net/1834/492

Influence of Coral Bleaching on the Fauna of Tutia Reef, Tanzania
Provedor de dados: 20
Autores: Öhman, M.C.; Lindahl, U.; Schelten, C.K.
In 1998, coral reefs of Tanzania were severely affected by bleaching. The coral mortality that followed caused a concern for coral reef degradation and overall resource depletion. In this study, we investigated coral bleaching effects on the coral reef fauna at Tutia Reef in Mafia Island Marine Park, Tanzania. Corals from adjacent reef patches of the species Acropora formosa were transplanted into plots, and reef structure and associated fish assemblages were examined before and after the bleaching event. Following the coral bleaching, 88% of all corals died. A year after the event, a large proportion of the dead corals was still standing. As surviving and dead corals were from different clones, results suggested that genetic variation might influence...
Tipo: Report
Palavras-chave: Coral reefs; Aquatic fauna.
Ano: 1999
URL: http://hdl.handle.net/1834/491

Coral bank obstructions to trawling in the middle to outer continental shelf east and west of Lagos.
Provedor de dados: 20
Autores: Awosika, L.F.
The continental shelf east and west of Lagos [long.2o.04.00E to long.4o 00’.00”E] is narrow shelf ranging in width between 25 to 30 kilometers. Echograms from several NIOMR’s cruises reveal the presence of some isolated and in some cases continuous bands of dead Holocene coral banks, within the middle to outer continental shelf [40-120m depth]. The most prominent of these structures are ones occurring between 75-100m of water and running almost parallel to the coastline. The dead coral structures are non-reef forms. They are found either as continuous Bands of rough bottom with width ranging between, 100 to 3,500m or in isolated pinnacled shapes. The pinnacled forms reach heights of over 7 meters in some cases. These coral structures pose obstructions to...
Tipo: Report
Palavras-chave: Coral reefs; Continental shelves; Coral reefs; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1990
URL: http://hdl.handle.net/1834/2381

Presencia de los octocorales Styla tula Diadema Bayer (Pennatulacea) y Carijoa riisei (Duchassaevg y Michelotti) (Telestacea) en la Costa Caribe colombiana
Provedor de dados: 20
Autores: Sanchéz-M., Juan M.
Con el fin de colectar octocorales telestáceos y penatuláceos se revisaron diferentes ecosistemas entre O y 30 m de profundidad, mediante buceo SCUBA y simple a pulmón que comprendían litorales rocosos, fondos arenosos y arrecifes coralinos, en un área que incluye a Cartagena, las Islas del Rosario, Tierra Bomba, Barú y San Bernardo, los bancos de Salmedina y Bushnell, las ensenadas de Zapzurro y Capurganá (8°20'-10°45' N; 75°50'-77025' W), en la región de Santa Marta (11°14'50" N; 74°15' W) y la Guajira (11°56'58" N; 72°16'18" W), en el Caribe colombiano. Se encontró por primera vez en el mar Caribe y la costa colombiana a Sfy/afu/a diadema Bayer (Virgulariidae: Pennatulacea) que se halló solamente en fondos arenosos blandos entre 25 y 30 m a la salida de...
Tipo: Journal Contribution
Palavras-chave: Rocky shores; Coral reefs; Habitat; Geographical distribution; Condition factor; Coral reefs; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1994
URL: http://hdl.handle.net/1834/3792

Condición de arrecifes de coral sometidos a presiones naturales recientes:  Bajos de Sancho Pardo, Cuba
Provedor de dados: 20
Autores: Caballero, H.; Alcolado, P.
Se evaluó la condición de la barrera de coral de los Bajos de Sancho Pardo (NW Cuba), área alejada de acciones antrópicas (excepto sobrepesca), pero que ha sufrido un período de frecuencia de huracanes, brotes de enfermedades y eventos de blanqueamiento de corales. En agosto del 2010 se aplicó la metodología de muestreo AGRRA en comunidades de corales de tres estaciones en las crestas, tres en las zonas traseras y 15 en el frente de arrecifes. Se identificaron 32 especies de corales, considerando solo colonias mayores de 10 cm de diámetro máximo. Los indicadores biológicos analizados sugieren cierta heterogeneidad en las condiciones medioambientales y diferentes grados de resiliencia de los corales ante los disturbios naturales. El cubrimiento vivo medio...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Hurricanes; Sampling; Disasters; Ecosystem resilience.
Ano: 2011
URL: http://hdl.handle.net/1834/4162

Coral Reef and High Sea Level at Luhuitou, Hainan Island during the Holocene.
Provedor de dados: 20
Autores: Huang, Deyin; Shi, Qi; Zhang, Yechun.
According to the field survey and 14C dating at Luhuitou, southern Hainan Island, a subsiding area, the authors conclude the high sea level history recorded by coral reef in the Holocene. At least 4 sea level high-stands can be identified from the distribution of coral reef ages: 7300 - 6000 cal.aBP, 4800 - 4700 cal.aBP, 4300 - 4200 cal.aBP and 3100 - 2900 cal.aBP. The highest sea level occurred around 7300 - 6700 cal.aBP, and biological-morphological zones took their shape during the stage. The later coral reefs developed in ponds, depressions, and developed outwards on both sides of Luhuitou peninsula. The modern coral reefs are developing in out reef flat and reef-front slope. Moreover, the time of high sea levels in the northern South China Sea...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Sea level; Holocene.
Ano: 2007
URL: http://hdl.handle.net/1834/5863

Arrecifes  de coral: un potencial económico, turístico  y educacional
Provedor de dados: 20
Autores: Olaechea-Juárez, A.; González, E.; Guitart-Pérez-Puelles, B.
Los arrecifes de coral son utilizados  en  dos  formas  principales:  la extractiva y  la  no-extractiva.  La  forma extractiva incluye la captura de las especies que en él habitan,  tales como peces, langostas, cangrejos,  etc.,  así como en la colecta de productos con fines ornamentales,  como esponjas, conchas y otros.  La forma no extractiva se basa en  la utilización del arrecife con fines de recreación, científicos  y educacionales.  La protección de los corales es de vital importancia para los hombres. El papel de los  acuarios  en  promover su preservación a través de la exhibición y  del  uso  del buceo contemplativo, es sumamente  importante.   Las  maravillas  que  ofrecen nuestros mares y en  particular  los arrecifes  coralinos,  constituyen...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs; Tourism; Educa.
Ano: 1994
URL: http://hdl.handle.net/1834/4659

Tendencia del cambio en el cubrimiento vivo por corales pétreos en los arrecifes coralinos de Cuba
Provedor de dados: 20
Autores: Alcolado, P.M.; Caballero, H.; Perera, S.
Los promedios ponderados de cubrimiento de corales pétreos obtenidos con la información más reciente disponible en Cuba (2003 a 2009) fueron 17,6% para crestas y 13,4% para arrecifes frontales. La tasa de disminución anual promedio del cubrimiento vivo del fondo por corales pétreos para las crestas de arrecifes y para los arrecifes frontales de Cuba fueron muy parecidas, de 1,78%/año y 1,75%/año respectivamente, con un promedio conjunto de 1,76%/año. Este último promedio es algo inferior a los estimados de otros autores para el Gran Caribe (2,5% a 2,7% anual). La relación entre tasa anual de disminución del cubrimiento vivo de coral y el cubrimiento vivo de coral inicial quedó representada por la regresión y = 0,0456x + 0,0142. Sin embargo, existió una...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2009
URL: http://hdl.handle.net/1834/3393

Participatory mapping of terrestrial fishery resources in Kwale District, Kenya
Provedor de dados: 20
Autores: Kimani, P.; Obura, D.
A participatory mapping study was conducted in Kinondo location of Kwale district in Kenya. The area is subject to high human population and development pressure in the north, where tourism and urban development is intense, compared to lower population pressure in the south where such development is low. Our focus was to document information about these resources that have maintained fishing for many generations and to address issues of their conservation and management. The study focused on the spatial arrangement, access, ownership and use of land-based resources, mainly shrubs, grasses and trees, at four landing sites along the north-south population gradient. Participatory techniques (sketch maps, livelihood diagrams and transect walks) were applied,...
Tipo: Journal Contribution
Palavras-chave: Artisanal fishing; Resource availability; Coral reefs.
Ano: 2004
URL: http://hdl.handle.net/1834/1122

Coral Bleaching : Causes, Consequences and Response
Provedor de dados: 20
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2001
URL: http://hdl.handle.net/1834/872

Variaciones espaciales y temporales de las  enfermedades en dos arrecifes de la región occidental de  Cuba
Provedor de dados: 20
Autores: González Ontivero, O.
Para Cuba no se encontraron trabajos que hagan énfasis en las enfermedades lo que  sugiere que existe un registro muy limitado de información sobre el tema. Este estudio  analiza la incidencia de enfermedades en dos  zonas de arrecifes de Cuba. Una en la  costa Norte y otra en la costa Sur, incluida dentro de un Parque Nacional, además de por  sus valores naturales, porque  mantiene las condiciones prístinas, sin influencia de  desechos humanos.    En los arrecifes de Ciudad de La Habana, en la región Norte, se han realizado diversos  trabajos sobre la diversidad y la densidad de las asociaciones de esponjas, gorgonias,  corales y peces. Sus resultados hacen referencia a las variaciones espaciales y  temporales en los índices ecológicos en relación con...
Tipo: Theses and Dissertations
Palavras-chave: Coral reefs; Eutrophication; Oil; Ecosystem management.
Ano: 2006
URL: http://hdl.handle.net/1834/5518

First record of the beaubrummel (Stegastes flavilatus) in reef habitats of Malpelo Island
Provedor de dados: 20
Autores: Rodríguez Moreno, Melina; López-Victoria, Mateo; Zapata, Fernando A.
Primer registro de la damisela bicolor (Stegastes flavilatus) en ambientes arrecifales de la isla Malpelo. El género Stegastes(familia Pomacentridae) tiene una distribución particular en el Pacífico Oriental Tropical, con dos especies ampliamente distribuidas en toda la región, y cinco especies restringidas a las islas oceánicas o al extremo boreal del trópico. Durante un estudio de las especies de este género presentes en ambientes arrecifales de la isla Malpelo, registramos, por primera vez para la isla, a Stegastes flavilatus. Esta es una especie rara en Malpelo, en donde S. arcifrons y S. beebei son dominantes. La cuarta especie presente en Malpelo, S. acapulcoensis, puede también considerarse como rara, aunque ligeramente más abundante que S....
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Marine fish; New records; Pomacentridae.
Ano: 2011
URL: http://hdl.handle.net/1834/4428

Sistema de escalas para la clasificación y puntaje de condición del bentos e  ictiofauna de arrecifes coralinos de Cuba y del Gran Caribe.
Provedor de dados: 20
Autores: Durán, A.; Alcolado, P. M.
Se propone  un sistema de escalas de clasificación y puntaje de bioindicadores de de condición del bentos y de la ictiofauna de arrecifes coralinos de la metodología AGRRA (Atlantic and Gulf Rapid Reef  Assessment), con algunos márgenes de variación más amplios que los aplicados en la Región del Arrecife Mesoamericano por otros autores. Por esa razón puede ser aplicable tanto en Cuba como en el  Gran Caribe. Las escalas tienen cinco categorías de condición de los indicadores a los que corresponden  puntajes del 1 al 5, respectivamente. La mayoría de los indicadores tiene en sus intervalos una  progresión geométrica de base 2. En los restantes, la escala de intervalos se basó en el criterio de los  autores. Las escalas se basaron en los abundantes datos de...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Environmental assessment; Coral reefs; Environmental assessment; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_37751.
Ano: 2011
URL: http://hdl.handle.net/1834/4055

Regional report « coral reef monitoring » - South West Indian Ocean Region – 2003 Annual Report
Provedor de dados: 20
Autores: Koonjul, M.; Meunier, S.; Moyne-Picard, M.; Bigot, L.; Tara, L.; Jean, M.; Bijoux, J.; Ahamada, S.
The coral reefs of the Indian Ocean are characterized by a high degree of endemic organisms and biodiversity. Over and above their global importance, they are revenue sources for the coastal and insular populations, and play an important role in coastal protection, in an area that is subjected to strong cyclonic activity. Coral reefs are present in the five member states of the IOC. They constitute a federative theme for the region, which justifies the need to develop a “reef monitoring action” through a “regional reef-monitoring network”. It was made clear during recent regional meetings that the reefs are subjected to very strong pressure due to human activities and natural factors (El Niño, massive coral mortality of 1998), and that their conservation...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2003
URL: http://hdl.handle.net/1834/315

The 1997-1998 Mass Bleaching Event Around the World
Provedor de dados: 20
Autores: Wilkinson, C.P.
There has been significant bleaching of hard and soft corals in widely separate parts of the world from mid-1997 to the last months of 1998. Much of this bleaching coincided with a large El Nino event, immediately switching over to a strong La Nina. Some of the reports by experienced observers are of unprecedented bleaching in places as widespread as (from west to east) the Middle East, East Africa, the Indian Ocean, South, Southeast and East Asia, far West and far East Pacific, the Caribbean and Atlantic Ocean.
Tipo: Report
Palavras-chave: Coral reefs; El Nino phenomena.
Ano: 1998
URL: http://hdl.handle.net/1834/545

Coral reef fish assemblages of Baie Ternay National Marine Park and Baie Beau Vallon, Mahé, Seychelles
Provedor de dados: 20
Autores: Pittman, S.J.
The two most important foreign exchange earning activities in the Seychelles are tourism and fisheries and therefore, the coastal areas and their management are of the greatest importance to the Seychelles government (Khadun, 1991). In recent years government policy has encouraged marine conservation (Procter, 1970; 1984-1989 National Development Plan) and is part way to fulfilling the programme outlined in the Environmental Management Plan of the Seychelles (EMPS, 1990-2000). To date, five marine areas have been designated as national marine parks covering about 23 000 ha with several more proposed parks and protected areas. However, financial constraints, a deficit of qualified personnel, lack of boundary delimitation, inadequate legislation and...
Tipo: Working Paper
Palavras-chave: Coral reefs; Reef fish.
Ano: 1995
URL: http://hdl.handle.net/1834/298

A new innovated and cheep model in building artificial reefs
Provedor de dados: 20
Autores: Mahmoud, M.A.; Ammar, M.S.A.
A novel and cheep approach for building artificial reefs was designed in such a way that sediments in an area of high sedimentation rate will be utilized in building the artificial substrate with no further sediment accumulation afterwards. The model consists of several steel cylinders which are soldered together in such a way to form a reef flat, a gentle slope and a steep slope, with two layers of narrow opening meshes (a lower plastic and an upper metallic one). Within a short periode (3 months), a substrate layer of a total of ~ 1 cm was formed between the two meshes, this layer increased to ~2 cm after 9 months. Transplants of the three species Stylophora pistillata, Echinopora gemmacea and Montipora spongiosa grow better when the attaching surface is...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Artificial coral reefs; Transplantation; Substrate; Model; Sedimentation Sediment transport Artificial reefs.
Ano: 2005
URL: http://hdl.handle.net/1834/1298

Transplantation Of Coral Fragments
Provedor de dados: 20
Autores: Obura, D.; Visram, S.
Coral reefs globally are increasingly under threat from environmental and anthropogenic factors, particularly the recent widespread bleaching and mortality of corals due to the temperature anomaly recorded during the 1997/98 El Niño. The active rehabilitation of reefs maybe necessary in some locations. Different rehabilitation methods require development for use in different conditions according to the constraints of area, availability of funding and reasons for rehabilitation. A number of studies have involved transplantation of parts of adult corals at a variety of technical, financial and spatial scales. Methods have included placement of loose staghorn Acropora branches (Bowden-Kirby, 1997; Lindahl, 1998) on suitable substrates, cementing corals to...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/485

The anthropogenic effluents of the human activities on the red sea coast at hurghada harbour (case study)
Provedor de dados: 20
Autores: Madkour, H.A.; Dar, M.A.
The heavy metal accumulations in the seawater, coral reefs and two effective fractions of underlying sediments (&lt;0.125mm and &lt; 0.063mm) were studied in the coastal and tidal flat zones at the main shipyard near of Hurghada Harbour. The area of investigation is very worse whereas, it is considered tailing outlet for both solid and liquid influents of many human activities in/and surrounding the harbour. The solid phases are of construction remains, paint remains, iron pipe rusts, hydrocarbons, plastic bags, metal and wood remains as well as the artificially conglomerate stones that thrown in the in the marine area. The liquid phase is restricted in the continuous brine water draining to the sea from a huge desalination plant (Capacity 5000 cubic...
Tipo: Journal Contribution
Palavras-chave: Environmental Study; Sediments; Sea water; Coral reefs; Heavy metals; Coral reefs; Heavy metals; Sea water; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_6903.
Ano: 2007
URL: http://hdl.handle.net/1834/1890

Assessment of Coral Reef Degradation in Tanzania: Results of Coral Reef Monitoring  1999
Provedor de dados: 20
Autores: Muhando, C.A.; Mohammed, M.S.; Machano, H.
Coral reefs play a crucial role in the well being of coastal communities in Tanzania (Johnstone et al., 1998; Muhando, 1999). However, despite their usefulness, coral reefs are being degraded by destructive anthropogenic activities (Salm et al., 1998) and natural causes (e.g., competition, predation, diseases, bleaching, etc.). The coral bleaching and mortality event of March - June 1998 was the most serious natural calamity ever recorded in the Indian Ocean (Wilkinson, et al., 1999). Several areas along the coast of Tanzania were affected. The degree of coral mortality varied between sites, from 60% - 90% at Tutia Reef in Mafia Island Marine Park and Misali Reef on the west coast of Pemba, to approximately 10% on reefs around Unguja Island, Zanzibar...
Tipo: Other
Palavras-chave: Coral reefs.
Ano: 1999
URL: http://hdl.handle.net/1834/434

Mapeo del fondo marino en el borde de la plataforma continental y talud de la Zona Económica Exclusiva (ZEE) uruguaya
Provedor de dados: 20
Autores: De Mello, C.; López-Orrego, G.
Se analizaron los datos hidroacústicos obtenidos con la ecosonda multihaz Simrad EM-302 a bordo del B/O Miguel Oliver en la campaña 01-2010 durante enero-febrero de 2010. El objetivo fue mapear el fondo oceánico de parte de la plataforma y talud de la Zona Económica Exclusiva (ZEE) uruguaya. El procesamiento fue realizado mediante los softwares libres MB-System y GRASS GIS. Con los datos corregidos se obtuvieron grillas de 3 X 3 m para describir las formaciones del fondo y de 1/8mn x 1/8mn para realizar un mapa topográfico y otro batimétrico (con isóbatas cada 100 m) de toda el área de estudio. Se realizó además una base de datos de las principales formaciones observadas (elevaciones y depresiones) conteniendo imágenes, posición y dimensiones (altura...
Tipo: Preprint
Palavras-chave: Multibeam sonar; Seafloor mapping; Submarine canyons; Coral reefs.
Ano: 2011
URL: http://hdl.handle.net/1834/4376

Socio-Economic Assessment of the Impacts of the 1998 Coral Reef Bleaching in the Indian Ocean: A Summary
Provedor de dados: 20
Autores: Cesar, H.S.J.; Westmacott, Susie; Pet-Soede, L.
Coral reefs are a vital resource to many areas of the Indian Ocean. Coastal populations are continuously increasing (Table 1) and relying on this resource as the basis of the economy. Across the region, the two common socio-economic reef based activities are fisheries and tourism. For local subsistence fishermen, reef fisheries often represent their only livelihood. Degradation of coral reefs will first impact the reef fishery and subsequently, the local fishing community. Tourism also is often heavily dependent on coral reefs as the main attraction.
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2001
URL: http://hdl.handle.net/1834/481

Reefs in Tobago
Provedor de dados: 20
Autores: Padmanabhan, S.
This map depicts the reefs of the isle of Tobago.
Tipo: Other
Palavras-chave: Reefs; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2006
URL: http://hdl.handle.net/1834/2895

Condición de arrecifes de coral sometidos a presiones naturales recientes:  Bajos de Sancho Pardo, Cuba.
Provedor de dados: 20
Autores: Alcolado, P.M.; Caballero, H.
Se evaluó la condición de la barrera de coral de los Bajos de Sancho Pardo (NW Cuba), área alejada de acciones antrópicas (excepto sobrepesca), pero que ha sufrido un período de frecuencia de huracanes, brotes de enfermedades y eventos de blanqueamiento de corales. En agosto del 2010 se aplicó la metodología de muestreo AGRRA en comunidades de corales de tres estaciones en las crestas, tres en las zonas traseras y 15 en el frente de arrecifes. Se identificaron 32 especies de corales, considerando solo colonias mayores de 10 cm de diámetro máximo. Los indicadores biológicos analizados sugieren cierta heterogeneidad en las condiciones medioambientales y diferentes grados de resiliencia de los corales ante los disturbios naturales. El cubrimiento vivo medio...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Hurricanes; Sampling; Disasters; Ecosystem resilience.
Ano: 2011
URL: http://hdl.handle.net/1834/4179

A Low-Tech Method for Reef Rehabilitation by Stabilisation of Transplanted Corals
Provedor de dados: 20
Autores: Lindahl, U.
Many coral reefs that have been subjected to severe coral mortality may erode into rubble before the reef framework has been stabilised by the growth of recruiting or surviving corals and other calcifying organisms. Since unconsolidated coral rubble provides a poor substrate for coral recruitment and subsequent growth, these damages can persist for a long time, even where there is ample supply of coral larvae. Rehabilitation of this type of habitat through coral transplantation has therefore been hampered since the substrate does not provide a base for attachment. Unattached corals that are moved by water movements may suffer severe damages through breakage and abrasion, and are also at risk of being buried in the shifting sediment. The aim of the present...
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 1999
URL: http://hdl.handle.net/1834/431

Coral Recovery From Bleaching in Alphonse and Bijoutier
Provedor de dados: 20
Autores: Goreau, T.J.
Mortality of corals in the Alphonse group following the 1998 bleaching event was somewhat less than in the high islands of the Mahegroup. Overall mortality of corals on fore reef slopes was around 90%in shallow water and around 70-80% on vertical slopes, in comparison to values around 95 and 99% in the inner islands. Although mortality of Acroporas was nearly total, several small surviving colonies were found at a range of depths including very shallow seagrasses. In contrast with the high islands, many partially surviving Pocilloporaverrucosa colonies were found. The major survivors were Helioporacoerula (rare in the inner islands), Porites head species (probablylutea), Porites cylindrica,Porites nigrescens, Astreoporamyriophthalma, Hydnophora microconos,...
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 1998
URL: http://hdl.handle.net/1834/276

Comunidades de esponjas de los arrecifes del Archipiélago Sabana-Camaguey, Cuba
Provedor de dados: 20
Autores: Alcolado, P.M.
The research was carried out in order to know the sponge community composition and structure of the Archipelago Sabana-Camagüey, and to assay their use as indicators of the environmental severity and predictability, as well as of the most important stressors of this territory.  For this purpose, sampling was done at stations located in 10 reef transects (between 10 and 20 m deep). Species which occurred more frequently with numerical dominance are typical of environments submitted to strong sedimentation and turbulence, which suggests that these environmental stressors and light are the main determinants of sponge community structure and composition in the studied reefs. The development of dense algal mats is also determinant in shallow stations. Species...
Tipo: Journal Contribution
Palavras-chave: Aquatic communities; Sponges; Coral reefs; Aquatic communities; Coral reefs; Sponges; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_7321.
Ano: 1999
URL: http://hdl.handle.net/1834/3439

Coral reef fish assemblages of coralline and granitic habitats of Curieuse Marine National Park
Provedor de dados: 20
Autores: Pittman, S.J.
Curieuse Marine National Park encompasses a diverse range of shallow water marine and brackish habitats including coralline fringing reefs, granitic boulder reefs, deep patch reefs, algal flats, seagrass meadows, intertidal rocky shore, sandy beach and mangrove habitat. Many of these shallow water habitats support an abundance of varied marine life, which in turn supports a burgeoning interest from tourist divers and snorkellers. Curieuse Marine National Park includes Curieuse Island and the surrounding waters including the channel between the island and the north-eastern coastline of Praslin. The designated boundary extends from Chevalier Point in the west to Pointe Zanguilles in the east up to high water mark, and includes the outlying islets of St....
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 1997
URL: http://hdl.handle.net/1834/635

Las formaciones coralinas de Isla Tortuguilla (Caribe colombiano)
Provedor de dados: 20
Autores: López-Victoria, M.; Díaz, J.M.; Márquez, J.C.
Tortuguilla is a small island off the southern portion of the Colombian Caribbean continental coast. It is surrounded by a shallow calcareous shelf which is overgrown by recent coral formations whose distribution, composition and zonation are herewith qualitative described for the first time. Observations and data collecting were conducted during  two days from a boat by snorkeling at 63 stations and along manta tow transects. Despite the reduced area and the adverse turbidity and sedimentation conditions, at least 16 species of stony corals were registered (4 more to be confirmed), being Millepora spp. and Siderastrea siderea the most common. Five different coral assemblages were recognized.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Composition; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2000
URL: http://hdl.handle.net/1834/3240

Los arrecifes de la Isla de San Andrés (Mar Caribe, Colombia)
Provedor de dados: 20
Autores: Geister, J.
Se describen los rasgos topográficos, sedimentológicos y la distribución de la fauna bentónica, en los sectores NE y E de la plataforma submarina de San Andrés. La barrera de Barlovento se destaca por un crecimiento profuso del hidrocoral Millepora. Esto se interpreta como adaptación ecológica a la resaca de olas largas, generada por los vientos alisios a través de toda la extensión del mar Caribe.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Geographical distribution; Coral reefs; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1973
URL: http://hdl.handle.net/1834/3263

Condición de los arrecifes de coral frente a costas con asentamientos humanos y aportes terrígenos: el caso del litoral habanero, Cuba
Provedor de dados: 20
Autores: Caballero, H.; Alcolado, P.M.; Semidey, A.
Coral reef condition north of the Havanan provinces (NW Cuba), an area with variable influence from human settlements and runoff, was assessed using the AGRRA methodology’s benthic biological indicators: live coral cover, coral density, maximum colony diameter, old and recent coral mortality, coral recruitment, Diadema antillarum density, and macroalgae cover. Coral communities at 11 reef crest and 22 forereef sites were sampled during 2004. The Shannon heterogenety and Pielou evenness indices were calculated. A total of 33 species of coral, larger than 10 cm in maximum diameter, were identified. The biological indicators analyzed showed significant differences among sites, which suggest a marked heterogeneity in environmental conditions along the study...
Tipo: Journal Contribution
Palavras-chave: Species diversity; Abundance; Coral reefs; Coral reefs; Species diversity; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2009
URL: http://hdl.handle.net/1834/3521

Diversidad y distribución de la macro- y meiofauna (especialmente nemátodos) en el ecosistema arrecifal de Punta Francés, Cuba
Provedor de dados: 20
Autores: Ruiz Abierno, A.
Se estudió la diversidad y distribución de la macro-  y meiofauna  y los rasgos  funcionales de nemátodos marinos en dos sitios y cuatro hábitats dentro del ecosistema  arrecifal de Punta Francés, Isla de La Juventud, Cuba. Los hábitats seleccionados  fueron: seibadal,  arena, coral muerto y fondo duro, y se muestrearon en dos sitios  dentro del arrecife (Punta Francés y Cabezo de Moya) en Junio del 2010. Se  identificaron y contaron los organismos de la macro- y meiofauna en las muestras; los  nemátodos fueron identificados hasta especie, se calculó su tamaño y biomasa y se  clasificaron en grupos tróficos.  Los hábitats de coral muerto y fondo duro por su  heterogeneidad y cubierta de césped de algas  tuvieron  macro-  y meiofauna más  diversa. La...
Tipo: Theses and Dissertations
Palavras-chave: Microfauna; Meiofauna; Coral reefs; Ecosystems.
Ano: 2013
URL: http://hdl.handle.net/1834/5484

Management Of Bleached And Severely Damaged Coral Reefs
Provedor de dados: 20
Autores: Wells, Sue.
Coral reefs are now recognised as the most diverse ecosystems in the sea and of immense economic importance. In 1998/1999 a major coral bleaching event (linked to El Niño and almost certainly to climate change) caused extensive reef damage throughout the Indian Ocean, with coral mortality exceeding 90% in some areas. This can be likened to large areas of tropical rainforest being razed to the ground. There is an urgent need to take immediate action. We need to stimulate a response comparable to the international reaction to the forest fires in Indonesia, which generated intense international concern and rapid response planning.
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/487

Evaluación de las asociaciones de peces de los arrecifes coralinos del Centro Internacional de Buceo María la Gorda, Parque Nacional Guanahacabibes, Cuba
Provedor de dados: 20
Autores: Cobián, D.; Chevalier, P.P.
El buceo contemplativo en los arrecifes coralinos es una de las pocas actividades autorizadas en el área manejada por el Centro Internacional de Buceo María la Gorda del Parque Nacional Guanahacabibes. Se evaluó la composición y estructura de las asociaciones de peces en los arrecifes utilizados por el Centro Internacional de Buceo María la Gorda. Considerando la posibilidad de cambios estacionales en la densidad y composición de los peces, se realizaron muestreos en las épocas seca y lluviosa. Se realizaron censos visuales en ocho sitios de buceo (12 transectos de 50 x 2 m en cada uno), en dos biotopos característicos del arrecife. Se estimaron los índices de diversidad, equitatividad, riqueza de especies, densidad y biomasa de peces. Los valores de...
Tipo: Journal Contribution
Palavras-chave: 1441; Biodiversity; Fisheries organizations; Coral reefs; Coral reefs.
Ano: 2009
URL: http://hdl.handle.net/1834/4098

Coral Reef Degradation In The Indian Ocean
Provedor de dados: 20
The reports in this volume summarize the extent of damage to the coral reefs of the Indian Ocean caused by the elevated temperatures in 1998. Most of the reports also contain information on the status of reefs 6 to 12 months after the events of 1998, thus describing the fate of dead corals, the first signs of recovery in some areas, and the secondary damage to other organisms dependent on the reef, such as fish. A brief summary of the results is given here.
Tipo: Report
Palavras-chave: Coral reefs; Degradation.
Ano: 1999
URL: http://hdl.handle.net/1834/316

Estructura y composición de las comunidades de gorgonias de los arrecifes del Archipiélago Sabana-Camagüey, Cuba: conectividad y factores determinantes
Provedor de dados: 20
Autores: Alcolado, P.M.; García-Parrado, P.; Hernández-Muñoz, D.
Para conocer la composición y estructura de las comunidades de gorgonias de los arrecifes coralinos del Archipiélago Sabana-Camagüey (norte central de Cuba) y los factores que las gobiernan, se realizaron muestreos de estaciones en 10 transecciones de arrecife que incluyen la zona trasera (cerca de 1 m de profundidad) y la zona del arrecife frontal (entre 5 y 20 m de profundidad). La especie más predominante y frecuente fue Pseudopterogorgia americana, seguida por Eunicea flexuosa, Eunicea mammosa, Plexaurella dichotoma y Plexaura kuekenthali. La primera es típica de fondos rocosos con acumulación de sedimentos, y las demás son consideradas como resistentes a la turbulencia del agua, excepto la última. Según el análisis BIOENV la turbulencia del agua fue...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2008
URL: http://hdl.handle.net/1834/3487

Ciguatera Risk Assessment In The Indian Ocean Following The 1998 Coral  Bleaching Event
Provedor de dados: 20
Autores: Turquet, J.; Quod, J.P.; Conejero, S.; Ralijaona, C.
During the last two decades, countries from the Indian Ocean region have experienced a variety of seafood poisonings involving coral reef fishes (ciguatera), turtles (chelonitoxism), sharks (carchatoxism) and sardines (clupeotoxism) (Quod &amp; Turquet, 1996; Turquet et al., 2000a). The ecotoxicological process of ciguatera fish poisoning (CFP) is caused by benthic dinoflagellates from coral reefs (Gambierdiscus, Prorocentrum, Ostreopsis) that are epiphytic on algal turfs, coral rubble and macro-algae. They produce potent neurotoxins that accumulate in herbivorous marine animals and are transferred to higher levels of the food chain by carnivorous fish. These microalgae are natural inhabitants of coral reefs and become problematic when densities reach...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/483

Mapeo del fondo marino del talud continental superior y medio de Uruguay
Provedor de dados: 20
Autores: López-Orrego, Guzmán; De Mello, Camila; Marín, Yamandú.
We analyzed the acoustic data obtained with a multibeam echosounder during an oceanographic survey abroad the “R/V Miguel Oliver” in january-february of 2010. The aim was mapping the sea floor of the continental slope of the uruguayan Exclusive Economic Zone (EEZ). The acoustic data were processed with MB-System software, and then incorporated into a Geographic Information System (Quantum GIS). We obtained 3 m for 3 m grid files to describe small submarine structures (mounds and pockmarks), and also a topographic map of the entire area to describe large submarine structures (submarine canyons and landslides). When we analyzed the topography of the entire area we identified 4 submarine canyons and the beginning of a fifth in the south end. We also observed...
Tipo: Proceedings Paper
Palavras-chave: Multibeam sonar; Seafloor mapping; Submarine canyons; Coral reefs.
Ano: 2011
URL: http://hdl.handle.net/1834/4336

Environmental effects on the distribution of corallimorpharians in Tanzania
Provedor de dados: 20
Autores: Öhman, M.C.; Kuguru, B.L.; Muhando, C.A.; Wagner, G.M.; Mbije, N.E.
This study examined the distribution and abundance of corallimorpharians (Cnidaria, Anthozoa) in Tanzania in relation to different aspects of the coral reef environment. Five reefs under varying degrees of human disturbance were investigated using the line intercepttransect and point technique. Corallimorpharian growth and the composition of the substratum were quantified in different habitats within reefs: the inner and middle reef flat, the reef crest, and at the 2and 4 m depths on the reef slope. Corallimorpharians occurred on all the reefs and 5 species were identified: Rhodactis rhodostoma, R. mussoides, Ricordea yuma, Actinodiscus unguja and A. nummiforme. R. rhodostoma was the dominant corallimorpharian at all sites. Within reefs, they had the...
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/728

Composición y estructura de la comunidad de octocorales en los Bajos de Sancho Pardo, arrecife de Los Colorados, Cuba
Provedor de dados: 20
Autores: Pérez- Angulo, A.; Nuez-Hernández, D.
Se estudiaron la composición y estructura de las comunidades de octocorales en cinco sitios localizados en los Bajos de Sancho Pardo (arrecife de Los Colorados (NW Cuba)) en agosto del 2010. Se empleó como unidad de muestreo un marco cuadrado de un metro de lado. En total se estudiaron 11 zonas del arrecife frontal, dos zonas traseras y una cresta. Se identificaron 34 especies de gorgonias de 2687 colonias. En el arrecife frontal, Pseudopterogorgia americana y Pseudopterogorgia elisabethae fueron las especies dominantes, mientras que en la zona trasera lo hicieron Briareum asbestinum y Pseudopterogorgia bipinnata. En la cresta arrecifal predominaron Gorgonia ventalina y Plexaura homomalla. Se encontraron diferencias significativas (P = 0.05) para la...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Ecological associations.
Ano: 2011
URL: http://hdl.handle.net/1834/4170

Variaciones espaciales y temporales  en el reclutamiento y la salud de  corales hermatípicos en arrecifes de  la región occidental de Cuba
Provedor de dados: 20
Autores: Perera- Pérez, O.
La investigación se llevó a cabo entre Septiembre de 2009 y Agosto de 2010. El  objetivo fue determinar la variabilidad espacial y temporal en el reclutamiento y la salud de  corales hermatípicos en arrecifes con diferentes niveles de impacto. Se realizó un análisis  espacial entre los arrecifes de Los Colorados (LC), La Habana (LH) y Punta Francés (PF) y  un análisis trimestral entre las estaciones de LH. Los indicadores ecológicos seleccionados  para llevar a cabo el análisis espacial y temporal a nivel de comunidad fueron: riqueza de  especies,  diversidad de Shannon, equitatividad de Pielou, densidad por especies, densidad  de reclutas y juveniles y cubrimiento de sustrato (algas, esponjas y corales). Para el análisis  espacial a nivel de población se...
Tipo: Theses and Dissertations
Palavras-chave: Coral reefs; Recruitment; Health; Temporal variations.
Ano: 2012
URL: http://hdl.handle.net/1834/5512

East Africa : Coral reef programs of eastern Africa and the Western Indian Ocean
Provedor de dados: 20
Autores: Muthiga, N.
This report gives an updated description of the coral reef and associated ecosystem programs of the Eastern African mainland states, which include the nations of Somalia, Kenya, mainland Tanzania, Zanzibar and Mozambique as well as the Western Indian Ocean island states of Comoros, Madagascar, Mauritius, Reunion and Seychelles.
Tipo: Proceedings Paper
Palavras-chave: Coral reefs.
Ano: 1998
URL: http://hdl.handle.net/1834/875

Management of Bleached and Severely Damaged Coral Reefs
Provedor de dados: 20
Autores: Westmacott, Susie; Teleki, Kristian; Wells, Sue; West, Jordan.
Coral reefs are one of the most threatened ecosystems in the world. Rivalling terrestrial rainforests in their biological diversity, and providing major economic benefits from fisheries and tourism, coral reefs ecosystems are of global concern. In addition, reefs provide many vital functions in developing countries, especially in Small Island Developing States. Until recently, stresses caused by human activities – such as land-based sources of pollution and destructive fishing practices – were considered to be the primary dangers to coral reefs. While these problems still persist, the last two decades have seen the emergence of yet another, potentially much greater threat. Coral reefs have been affected, with increasing incidence and severity, by coral...
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/264

Initial Considerations on Methods to Survey Reef Status and Recovery
Provedor de dados: 20
Autores: Turner, J.
Tipo: Book Section
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/954

Coral transplant damage under various management conditions in the Mombasa Marine National Park, Kenya
Provedor de dados: 20
Autores: Cros, A.; McClanahan, T.R.
Two coral species, Porites palmata and Porites lutea, were transplanted into three distinct management areas adjacent to the Mombasa Marine National Park, Kenya: A no-fishing MPA; a gear-restricted reserve with no beach seining; and a reserve with beach seining. Corallivory by fish or breakage by fishing gear was measured over a 57-day period. Porites palmata, the branching species, was more susceptible to disturbance than Porites lutea, the massive species, which showed no difference in mortality rate between the three management areas. Porites palmata was affected more by corallivory than fishing gear and, therefore, suffered more damage from coral predators in the no-fishing MPA. Corals transplanted into the gearrestricted fishing site had the highest...
Tipo: Journal Contribution
Palavras-chave: Marine parks; Coral reefs.
Ano: 2003
URL: http://hdl.handle.net/1834/961

Peces asociados a formaciones coralinas de cinco áreas del Caribe colombiano: listado de especies y primeros registros para las áreas
Provedor de dados: 20
Autores: Reyes Nivia, M. C.; Rodríguez Ramírez, A.; Garzón Ferreira, J.
Five coral reef areas at the Colombian Caribbean were assessed between 1998 and 2003 through the “National Coral Reef Monitoring System of Colombia” (SIMAC), recording 198 species of fishes. The highest species number was observed in Chengue bay (149), including four new records for the Santa Marta area. At San Andrés Island, 138 species were identified, with nine new records for the Archipelago. At the Rosario Island, 128 species were recorded with eight new records, while 114 species and 12 new records were observed at San Bernardo Islands. Of the 119 fish species recorded at the Urabá area, 48 are reported for the first time.
Tipo: Journal Contribution
Palavras-chave: Reef fish; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2004
URL: http://hdl.handle.net/1834/3061

Primeros registros de bacterias marinas heterótrofas y hongos aislados de los arrecifes que bordean la plataforma SW de Cuba.
Provedor de dados: 20
Autores: Miravet, M.E.; Enríquez, D.; Lugioyo, G.M.; Delgado, Y.; Núñez, R.; Cabrera, H.; Martí, J.
Se registran por primera vez para los arrecifes de la plataforma SW cubana, la presencia de 5 géneros y 16 especies de bacterias heterótrofas aeróbicas y 15 géneros de hongos, de los cuales, 7 se identificaron hasta especie. Los géneros Bacillus sp. (bacteria) y Aspergillus sp. (hongo) resultaron los más cosmopolitas de todos los géneros encontrados, predominando en las aguas y sedimentos de todos los arrecifes estudiados. Del total de cepas aisladas la mayor diversidad de géneros, tanto de bacterias heterótrofas aeróbicas como de hongos, correspondió a muestras procedentes del arrecife Juan García.
Tipo: Journal Contribution
Palavras-chave: New records; Species diversity; Coral reefs; Bacteria; Coral reefs; Species diversity; Bacteria; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_765.
Ano: 2003
URL: http://hdl.handle.net/1834/3331

Cambio temporal en la estructura de la comunidad coralina del área de Santa Marta - Parque Nacional Natural Tayrona (Caribe colombiano)
Provedor de dados: 20
Autores: Martínez, S.; Acosta, A.
Several predictions have been made, about magnitude and direction of temporal changes in the coral community structure, during the last decade. However, few studies have demonstrated it quantitatively. In order to document such changes, the coral community structure was studied in four continental reefs in the Colombian Caribbean, two in the Santa Marta region: Punta Betín (PB) and Morro Grande Island (MO), and two in the Tayrona National Natural Park (PNNT): Granate cove (GR) and Gayraca bay (GA). Coral composition and cover were quantified in 2002 and compared to base line studies from 1989 (PB, MO &amp; GR) and from 1992 (GA). These variables were quantified by 20 m linear transects between 1.5 m and 29 m depth. After a decade, all reefs lost in average...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Degradation; Temporal variations; Community composition; Coral reefs; Degradation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2159.
Ano: 2005
URL: http://hdl.handle.net/1834/2012

Coralline Algae, Important Coral-reef Builders Threatened by Pollution
Provedor de dados: 20
Autores: Mohammed, S.M.; Björk, M.; Björklund, M.; Semesi, A.
The release of inorganic nutrients into the sea by domestic sewage is a major threat to many marine systems. This eutrophication affects coral-reef organisms indirectly by increased growth of microalgae, leading to increased sedimentation, decreased light availibility, rapid growth of opportunistic macroalgae, etc. In this paper, we report a decrease in the cover of important group of coral-reef builders, the coralline algae. This decrease might be caused by the outlets of sewage water from Zanzibar town. Laboratory and field experiments show that both the growth rate and the calcification of these organisms are negatively affected by high phosphate levels, but not by nitrate or ammonia.
Tipo: Journal Contribution
Palavras-chave: Sewage; Algae; Eutrophication; Coral reefs; Nutrients; Environmental degradation; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_34821.
Ano: 1995
URL: http://hdl.handle.net/1834/302

Efecto de la sedimentación en el reclutamiento de las macroalgas Dictyota spp. y Lobophora variegata: un estudio experimental en el Parque Nacional Natural Tayrona, Caribe colombiano
Provedor de dados: 20
Autores: Flórez-Leiva, L.; Rangel-Campo, A.; Díaz-Ruíz, M.; Venera-Pontón, D. E.; Díaz-Pulido, G.
La sedimentación está frecuentemente implicada como un factor clave en la degradación arrecifal. Sin embargo son pocos los estudios experimentales que evalúan este importante proceso en la dinámica del reclutamiento de las algas en los arrecifes coralinos. En un experimento de campo se manipularon los niveles de sedimentación y se examinaron los impactos en el reclutamiento y crecimiento de las macroalgas pardas Dictyota spp. y Lobophora variegata en dos bahías (Chengue y Granate) del Parque Nacional Natural Tayrona, Caribe colombiano. Se encontró una gran variabilidad de respuestas de las algas a la sedimentación, la cual dependió del nivel de sedimento empleado, tipo de alga estudiada y parámetro poblacional considerado (reclutamiento o crecimiento). La...
Tipo: Journal Contribution
Palavras-chave: Sedimentation; Coral reefs; Coral reefs; Sedimentation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_6926.
Ano: 2010
URL: http://hdl.handle.net/1834/3765

Comparative study of three transect methods to assess coral cover, richness and diversity
Provedor de dados: 20
Autores: Beenaerts, N.; Berghe, E.V.
Three different transect methods were compared at two different sites in Kenya, on their efficiency to estimate hard coral cover, genus richness and Shannon diversity index. For a modified line transect method (LTM), the line intercept method (LIT) and a linear point intercept (LPI) method the relative efficiency of the three methods was calculated with respect to the tested parameters. The three methods were examined along identical transect lines (10 m) and a total of 27 transect triplets were recorded in Vipingo and 21 in Mombasa. The correlation coefficients for all three ecological parameters were calculated for the three possible pairs of methods, and the accumulation curves plotted for each of the parameters using number of transects as the...
Tipo: Journal Contribution
Palavras-chave: Coral reefs.
Ano: 2005
URL: http://hdl.handle.net/1834/1131

Dinámica de las interacciones algal-coral en dos Bahías de la región de Santa Marta (caribe colombiano) con distinto grado de influencia antropogénica
Provedor de dados: 20
Autores: Mejía N., N.; Garzón-Ferreira, J.
As a contribution to understanding the potential impact of macroalgae on coral communities, this work evaluated the presence and dynamics of algae-coral interactions in two bays of the Santa Marta region. Two stations were sampled in Chengue Bay, located within the Tayrona Natural Park, and two other in the Santa Marta Bay which is adjacent to the city of Santa Marta. Three permanent 10 m belt transects were settled at each station, at which a total of 270 coral colonies were monitored monthly. Algae - coral interactions were recorded from each colony based on five categories defined by the distance between the coral tissue and the algal mat. A total of 1956 interactions were recorded, 67% of which corresponded to direct contacts, 22% to indirect contacts,...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Algae; Interactions; Coral reefs; Algae; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2003
URL: http://hdl.handle.net/1834/3190

The Reefs of the Granitic Islands of the Seychelles
Provedor de dados: 20
Autores: Klaus, R.; Turner, J.; Engelhardt, U.
The status of coral reefs in the granitic islands of the Seychelles archipelago has been assessed by two independent surveys following the mass mortality caused by the 1997/98 bleaching event. Engelhardt (2000), working in collaboration with the Seychelles Department of Conservation surveyed 15 sites located mainly on the north west coast of Mahe during November and December 1999. During January 2000, Turner, Klaus, Hardman and West, working in collaboration with the Seychelles Marine Park Authority, surveyed 46 reef sites mainly to the east of Mahe, including Ste Anne, Ile Moyenne, Ile Cerf, Cousine, Praslin, Curieuse, La Digue, Grand Soeur and Felicite. Reefs around the granitic islands are shallow and rarely exceed 15 m depth. Both surveys aimed to...
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/466

Coral And Algal Response To The 1998 El Niño Coral Bleaching And Mortality On Kenya’s  Southern Reef Lagoons
Provedor de dados: 20
Autores: McClanahan, T.R.; Mangi, S.
The 1998 interaction between the El Niño and the Indian Ocean dipole produced one of the warmest years in recent records (McPhaden, 1999; Saji, 1999; Webster et al., 1999) and is reported to have caused extensive coral bleaching and mortality throughout the western Indian Ocean (Strong et al., 1998; Goreau et al., 1999; Wilkinson et al., 1999). Previous observations of coral bleaching in Kenya were recorded in 1987 and 1994 with the 1987 event causing significant mortality in corals and other benthic invertebrates (McClanahan, unpublished data and observations). The East African coast has a strong seasonal cycle and these bleaching events occurred at the end of the warm north-east monsoon, usually beginning in March, during the local annual peak of solar...
Tipo: Preprint
Palavras-chave: Coral reefs; El Nino phenomena; Algae.
Ano: 2001
URL: http://hdl.handle.net/1834/482

Coral Reef Monitoring and Management in Mozambique
Provedor de dados: 20
Autores: Motta, H.; Rodrigues, M.J.; Schleyer, M.
Mozambique possesses the third longest coastline along the Western Indian Ocean, extending 2700 km, much of which adjoins areas of coral reefs. The northernmost section of the coast extends for 770 km from the Rovuma River in the north (10º 20’ S) to Pebane in the south (17º 20’ S). In this section coral reefs constitute an almost continuous fringing reef on the eastern shores of the islands and the more exposed sections of the mainland coast. The central section of the coast between Pebane (17º 20’ S) and Bazaruto Island (21º 10’ S), a distance of about 950 km, is classified as a swamp coast. Twenty-four rivers discharge into the Indian Ocean along this section, each with an estuary supporting well established mangrove stands. The coastal waters are...
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/471

Concentraciones de nutrientes y eutrofización en arrecifes coralinos de los archipiélagos Los Canarreos y Sabana-Camagüey
Provedor de dados: 20
Autores: Montalvo, J.F.; Perigó, E.
Coral reefs are very sensitive to the increment in nitrogen concentrations and phosphorus, since these compounds propitiate the macroalgae growth, resulting in the degradation of coral reefs. With the purpose of assessing the degree of nutriphication of the coral reefs in Los Canarreos Archipelago, located in the periphery of the Gulf of Batabanó, and those located in the outer area of Sabana-Camagüey Archipelago (SCA), three samplings were executed in the reefs of Los Canarreos Archipelago (August 1999, March 2000 and August 2000). In SCA, samplings were done in May 2002 and August 2003. The parameters evaluated were nitrates + nitrite, ammonium, total nitrogen, inorganic phosphorus and total phosphorus. The nutrient contents in the reefs located in the...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs; Eutrophication; Nutrients (mineral); Nitrogen; Phosphorus; Coral reefs; Eutrophication; Nitrogen; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804.
Ano: 2006
URL: http://hdl.handle.net/1834/2084

Coral Bleaching in the Indian Ocean: Socio-Economic Assessment of Effects
Provedor de dados: 20
Autores: Cesar, H.S.J.; Westmacott, Susie; Pet-Soede, L.; Lindén, O.
The mean temperature on the planet is increasing. The rate of this increase appears to be accelerating and is at present approximately 2 degrees per century. 1998 was the warmest year since temperature recordings started some 150 years ago. Similarly the 1990s was the warmest decade. In addition, 1997 and 1998 saw the strongest El Niño ever recorded. As a consequence of this, very high water temperatures were observed in many parts of the oceans, particularly in the tropical areas. Due to the high water temperatures, the corals over much of the world bleached and subsequently died. In 1997–98, massive mortality occurred particularly among corals of the Indian Ocean. The reefs of Sri Lanka, Maldives, India, Kenya, Tanzania, and Seychelles were particularly...
Tipo: Report
Palavras-chave: Coral reefs; Climate change; Http://aims.fao.org/aos/agrovoc/c_35367.
Ano: 2002
URL: http://hdl.handle.net/1834/563

The Reefs of Mauritius
Provedor de dados: 20
Autores: Daby, D.; Hardman, E.; Turner, J.; Persands, S.; Klaus, R.; Fagoonee, I.; Baghooli, R.
The study investigated whether the coral reefs of Mauritius had suffered a mass bleaching event during 1998 as had been reported for other Indian Ocean reefs. Sea-surface temperature (SST) anomaly charts produced by NOAA show that SST was raised 1o C - 1.25o C above the climatological maximum for this region during February 1998, but the extent of bleaching around Mauritius was thought not to be severe, but was not recorded. A rapid assessment of the degree of coral bleaching on reefs around the whole coast of Mauritius was made during April 1999. Surveys were conducted while snorkelling and SCUBA diving and assessments made by direct observation, underwater video transects and underwater photography. Video was analysed to confirm the results from the...
Tipo: Preprint
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/453

Estructura de las asociaciones de peces en los arrecifes coralinos del Parque  Nacional Ganahacabibes, Cuba
Provedor de dados: 20
Autores: Perera-Valderrama, S.; Claro-Madruga, R.; Caballero-Aragón, H.; Cobián-Rojas, D.; Chevalier-Monteagudo, P.P.
Para la ejecución del plan de manejo del Parque Nacional Guanahacabibes es necesario establecer una línea base sobre la diversidad y estructura de las asociaciones de peces, así como sus posibles cambios como consecuencia de las variaciones espaciales y temporales. Se realizaron censos visuales de todas las especies en períodos lluvioso y poco lluvioso de los años 2007-2008, en sus principales zonas del arrecife. Se evaluaron 15 estaciones, mediante 6 tramos de 50 x 2 m. Entre los períodos lluvioso y poco lluvioso no se observaron diferencias significativas en los principales indicadores de la estructura de las asociaciones (diversidad de especies, densidad, biomasa, tallas y categorías tróficas), pocas especies mostraron diferencias en su abundancia como...
Tipo: Journal Contribution
Palavras-chave: Assemblages; Population abundance (in number); Marine fish; Coral reefs.
Ano: 2011
URL: http://hdl.handle.net/1834/4178

Levantamento Bibliográfico da Investigação nos Recifes de Coral em Moçambique
Provedor de dados: 20
Autores: Pereira, M.A.M.
Moçambique, dentro da sua extensa linha costeira, possui vastas áreas de recifes de coral. Estes ecossistemas caracterizam-se por uma elevada biodiversidade, abundância e riqueza estética. Estes factores conjugados, tornam os recifes de coral, num dos ecossistemas costeiros mais importantes para a economia do País, não só como fonte de proteína animal para as populações costeiras, mas também como fonte de divisas derivadas da indústria turística
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/265

Equinodermos asociados a formaciones arrecifales en Zihuatanejo y Acapulco, Guerrero, México
Provedor de dados: 20
Autores: Zamorano, P.; Leyte_Morales, G.E.
El conocimiento de los equinodermos de la región de Zihuatanejo y Acapulco, Guerrero, es escaso, y el existente refiere principalmente a listados taxonómicos. Con esos antecedentes, en este trabajo, se describión y caracterizó la comunidad de equinodermos asociada a arrecifes coralinos a partir de transectos de banda de 50 m de largo por 1 m d ancho. Durante 2004 se realizaron dos muestreos prospectivos (uno en época de lluvias y otro en época de secas). En total se registraron diez especies, tres asteroideos, seis echinoideos y un holoturoideo. La diversidad promedio obtenida en los 13 sitios estudiados (1.036 bits ind-1) se considera baja al compararla con la diversidad mácima posible (3.322 bits ind-1) debido a la dominancia del erizo negro Diadema...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2009
URL: http://hdl.handle.net/1834/3581

Zur Ökologie und Wuchsform der Säulenkoralle Dendrogyra cylindrus Ehrenberg Beobachtungen in den Riffen der Insel San Andrés (Karibisches Meer, Kolumbien)
Provedor de dados: 20
Autores: Geister, J.
Según observaciones submarinas realizadas alrededor de la Isla de San Andrés el coral de columnas Dendrogyra cylindrus prefiere como habitat las regiones protegidas como el arrecife de Sotavento y las barrancas y plataformas submarinas de la costa Occidental desde 1 m hasta unos 20 m de profundidad. Es el único coral de tamaño grande que se destaca en su capacidad de resistir a la abrasión fuerte por fragmentos de corales sueltos, movidos por la resaca de las ocasionales tempestades invernales en la costa occidental. Dendrogyra se mantiene en este ambiente, al lado de unas pocas especies de octocorales y escleractinios incrustantes y hemisféricos de tamaño pequeño sin sufrir daño permanente, por medio de su base ancha, su estructura maciza y sus septos...
Tipo: Journal Contribution
Palavras-chave: Coral; Coral reefs; Exoskeleton; Coral reefs; Exoskeleton; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2754.
Ano: 1972
URL: http://hdl.handle.net/1834/3307

Economic Implications of Fully-Protected Marine Reserves for Coral Reef Fisheries
Provedor de dados: 20
Autores: Rodwell, L.D.; Roberts, C.M.
Overexploitation of coral reefs causes species loss, stock collapses and habitat degradation and remains a major challenge for fisheries scientists and managers alike. To counter these, fully-protected marine reserves, areas closed to fishing and other harmful human activities represent an essential component of coral reef fisheries management. They overcome many of the management complexities of coral reefs, such as lack of data and enforcement, and provide vital opportunities for unhindered growth of fish stocks and protection of coral communities. Their role in conserving biodiversity and protecting habitat is undisputed.
Tipo: Report
Palavras-chave: Coral reefs; Marine reserves.
Ano: 2000
URL: http://hdl.handle.net/1834/556

Coral Reef Biodiversity Loss
Provedor de dados: 20
Autores: Ngoile, M.
Coral reef ecosystems are under increasing natural and anthropogenic pressures, despite their ecological significance and economic importance to mankind. The majority of land based activities and direct human use are borne by these shallow water areas, which interface between land masses and the open oceans. The objective of this paper is to give an overview of the value of coral reef ecosystems and the anthropogenic threats imposed on them, as well as to examine the interactions of coral reef ecological linkages to other coastal and marine habitats and the future of coral reef ecosystems. It is suggested that management measures for the preservation of reef systems must link coastal and marine systems, pay attention to socio-economic factors as well as...
Tipo: Report
Palavras-chave: Coral reefs; Biodiversity.
Ano: 1998
URL: http://hdl.handle.net/1834/449

A Preliminary Assessment of Coral Bleaching in Mozambique
Provedor de dados: 20
Autores: Schleyer, M.; Obura, D.; Rodrigues, M.J.
The 1997-1998 El Nino southern oscillation (ENSO) caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical reef fisheries and marine ecotourism. They represent one of Mozambique's main coastal assets and its coastal communities and growing tourism industry rely mainly on reef-based resources. Mozambican artisanal fisheries are largely centred on reefs and are responsible for about 70% of the total catch, highlighting their importance. Most tourism similarly occurs along the coast where the best infrastructure is established, especially near the coral reefs of Pemba, Mozambique Island, the Bazaruto Archipelago,...
Tipo: Report
Palavras-chave: Coral reefs; El Nino phenomena; Tourism.
Ano: 1999
URL: http://hdl.handle.net/1834/888

Coral reefs and their management in Tanzania
Provedor de dados: 20
Autores: Wagner, G.M.
Coral reefs are very important in Tanzania, both ecologically and socio-economically, as major fishing grounds and tourist attractions. Numerous fringing and patch reefs are located along about two-thirds of Tanzania’s coastline. These reefs have been partially to severely degraded by human (primarily destructive fishing practices) and natural (particularly coral bleaching) causes. These immediate human causes have been brought about by various socioeconomic root causes, particularly poverty and lack of proper management. After decades of human and natural impacts there has been only limited reef recovery. This paper presents a region-by-region analysis of trends in the condition of coral reefs in Tanzania in relation to the causes of damage. While earlier...
Tipo: Journal Contribution
Palavras-chave: Aquatic communities; Coastal zone; Fishery management; Coral reefs; Aquatic communities; Fishery management; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 2004
URL: http://hdl.handle.net/1834/1151

Vorläufige liste der scleractinen Korallen der Bahía de Concha bei Santa Marta, Kolumbien
Provedor de dados: 20
Autores: Geyer, O.F.
Se presenta una lista preliminar de las Scleractinia de la Bahía de Concha,  situada muy cerca de Santa Marta. La lista contiene 17 géneros y 20 especies, todos bien conocidos de los arrecifes coralinos del Mar Caribe. Se agrega una nota sobre  Cirrípedos endozóicos de los corales.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Islands; Coral reefs; Islands; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_3962.
Ano: 1969
URL: http://hdl.handle.net/1834/3308

Trends in the distribution of macroalgae in a bleached Kenyan reef ecosystem
Provedor de dados: 20
Autores: Ndirangu, S.; Uku, J.; Muthama, C.
In May 1999, two sites were selected within the Mombasa Marine Park and Reserve for the study of macroalgal succession due to bleaching. One of the sites was Starfish, which lies within the Mombasa Marine Park and is protected from fishing and the other site was Ras Iwatine, which lies in the Reserve area and is Subjected to fishing activities. The study revealed that the Starfish site had a significantly higher hard coral cover, which did not change over the study period. A comparison of the density of macroalgae revealed that a higher proportion of the substrate in Ras Iwatine was dominated by macroalgae. Settlement tiles, used to study algal recruitment, indicated that the succession process in the Starfish site passes through more stages compared to...
Tipo: Working Paper
Palavras-chave: Algal blooms; Coral reefs; Ecosystems.
Ano: 2002
URL: http://hdl.handle.net/1834/123

Evaluación de las asociaciones de peces de los arrecifes coralinos del Centro Internacional de Buceo María la Gorda, Parque Nacional Guanahacabibes, Cuba
Provedor de dados: 20
Autores: Cobián Rojas, D.; Chevalier Monteagudo, P.P.
Recreational SCUBA diving on the coral reefs is one of the few activities allowed in the area managed by the Centro Internacional de Buceo María la Gorda at the Guanahacabibes National Park. The composition and structure of fish associations were evaluated on the reefs visited by users of the diving center. To assess possible seasonal changes in fish community densities and composition surveys were carried during the dry and rainy seasons. Visual censuses were carried out at eight diving sites comprising two characteristic reef biotopes. Indices for diversity, evenness, species richness, density, and fish biomass were estimated. Mean density values by sampling site did not show significant differences between seasons. A total of 134 species were recorded...
Tipo: Journal Contribution
Palavras-chave: Species diversity; Coral reefs; Coral reefs; Species diversity; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2009
URL: http://hdl.handle.net/1834/3522

Coral Reef Monitoring in Mozambique: The Program and 1999 Results
Provedor de dados: 20
Autores: Gonçalves, P.M.B.; Pereira, M.A.M.; Motta, H.; Rodrigues, M.J.
Mozambique initiated a Coral Reef Management Programme (MCRMP) in 1998, with the core aim to ensure the long-term sustainable utilization of the coral reef resources of Mozambique. Within the programmed activities, the monitoring of coral reefs is one of the most important. Thus, a long-term monitoring programme was launched in 1999 with most of the monitoring stations being visited in November 1999. Several reefs along the coast were surveyed, using standardized methodology. The preliminary results of this study showed already that protected or inaccessible reefs were in better conditions than those freely exploited, and highlighted the need for management measures and establishment of marine protected areas. The present paper reviews the preliminary...
Tipo: Conference Material
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/435

Environmental Impact; In Osman Digna (SUAKIN)
Provedor de dados: 20
Autores: El hag, A ' Gadir.
Tipo: Report
Palavras-chave: Salinity; Air-water temperature difference; Winkler method; Sediments; Coral reefs.
Ano: 2007
URL: http://hdl.handle.net/1834/5093

Multisite Record of Climate Change from Indian Ocean Corals
Provedor de dados: 20
Autores: Grumet, N.S.; Dunbar, R.B.; Cole, J.E.
Coral records from coastal East Africa spanning 2° to 7°S (Kiwayu, Malindi, Watamu, Mombasa, Kisite, and Mafia) demonstrate that isotopic tracers preserved within coral aragonite accurately record intraseasonal to interannual changes in sea surface temperature. The strong seasonal signal observed at all six sites most likely reflects sea surface temperature variability forced by ocean circulation and reversals in wind direction associated with the Indo-African Monsoon. Strong southwesterly winds during the Southwest Monsoon initiate evaporative cooling and mixing, resulting in a sea surface temperature minimum in the late boreal summer. Coral δ180 values are higher during this period. Reproducibility in the coral δ180 signal between sites indicates that an...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs; Environmental impact; Climate change; Http://aims.fao.org/aos/agrovoc/c_35367.
Ano: 2000
URL: http://hdl.handle.net/1834/679

Las Scleractinia y Milleporina de las Islas del Rosario
Provedor de dados: 20
Autores: Pfaff, R.
Las Islas del Rosario se encuentran a 29 millas del suroeste de Cartagena, Colombia/Suramerica. Son de origen reciente y su edad no pasa mucho de 10000 años. Las Islas; la Periquito, la Arenas, la Rosario y la Tesoro, rodean en una distancia de una a dos millas a la Isla Grande. Esta, la principal, se encuentra entrecortada de sur a norte por caños en los cuales las aguas empujan casi todo el año en dirección hacia el norte. Todas las islas están rodeadas de arrecifes coralinos. Hasta ahora el autor encontró 48 especies y variaciones de Scleractinias y 3 Milleporas. Las condiciones ecológicas de las Islas del Rosario favorecen un crecimiento vigoroso de arrecifes.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Islands; Coral reefs; Islands.
Ano: 1969
URL: http://hdl.handle.net/1834/3298

Coral Bleaching in The Seychelles Impacts and Recommendations
Provedor de dados: 20
Autores: Goreau, T.J.
Coral bleaching was assessed by underwater digital video in reefs at 14 locations around the Seychelles in late May 1998 as part of a continuing assessment of reef health with the Seychelles Marine Park Authority. Preliminary estimates are that around three quarters of all corals were recently dead, ranging from around 50% to over 90% at different sites. More precise measurements of mortality will be available later from detailed quantitative analysis of video records, but these will be underestimates of final mortality because many corals that were still partially alive at the time were still dying. The catastrophic mortality was due to excessively high sea surface temperatures, whose effect exceeds all previous threats to reefs to date. Strong...
Tipo: Report
Palavras-chave: Coral reefs.
Ano: 1998
URL: http://hdl.handle.net/1834/896

Confirmation of the occurrence of the coral Pavona chiriquiensis Glynn, Maté and Stemann (Cnidaria: Anthozoa: Agariciidae) in the Colombian Pacific
Provedor de dados: 20
Autores: Zapata, F.A.; Rodríguez-Ramírez, A.; Rodríguez-Moreno, M.; Muñoz, C.G.; López-Victoria, M.
El género Pavona comprende 18 especies de las cuales Pavona chiriquiensis ha sido recientemente descrita y registrada en varias localidades del Pacífico oriental tropical. A partir de observaciones y colecciones realizadas en arrecifes de las islas Gorgona y Malpelo entre 1999 y 2005 se confirma su presencia en Colombia. El tardío registro de P. chiriquiensis en estas islas pudo ser debido a su similitud y confusión con P. varians, o a su reciente colonización del Pacífico colombiano.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2007
URL: http://hdl.handle.net/1834/3495

Status of coral reef affected by different impacts in some sites of the red sea
Provedor de dados: 20
Autores: Ammar, M.S.A.; Ghobashi, A.A.; Omran, M.A.; Shaaban, A.M.
Using Using SCUBA diving, surveying the coral reef communities at four sites, Red Sea Egypt was done. These sites are: Ras El Behar (polluted by petroleum oil), El-Hamraween (impacted by phosphate shipping), Shabrour Umm Gam’ar (harmed by recreational activities and has been suffering from the outbreak of Acanthaster planci during 1998) and Kalawy (a control site). The skeletal growth of the coral Stylophora pistillata was promoted greatly at the expense of other corals, in presence of chronic oil pollution (Ras El-Behar). In contrast, this species was completely suppressed in presence of phosphate and sulphur enrichment. Petroleum oil led to coral scarcity, space monopolization by one coral and increased sea urchins and algae. Coral reefs enriched with...
Tipo: Journal Contribution
Palavras-chave: Field Study; Coral reefs; Hydrocarbons; Phosphates; Coral reefs; Hydrocarbons; Phosphates; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_3719; Http://aims.fao.org/aos/agrovoc/c_35986.
Ano: 2007
URL: http://hdl.handle.net/1834/1909

Corales pétreos: jardines sumergidos de Cuba
Provedor de dados: 20
Autores: González-Ferrer, S.
Se describen los principios fundamentales para la tenencia de corales en acuarios marinos, los diferentes sistemas que se aplican y la experiencia obtenida en el Acuario Nacional de Cuba en la exhibición de estos organismos.
Tipo: Book Section
Palavras-chave: 1586; Aquarium systems; Coral reefs; Coral farming; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2004
URL: http://hdl.handle.net/1834/4122

Measuring Change and Recovery in Reef Ecosystems
Provedor de dados: 20
Autores: Teleki, Kristian; Sheppard, C.; Turner, J.
Assessing environmental impacts and monitoring ecosystem recovery requires an understanding of the underlying spatial and temporal changes that have occurred. There are three main questions to be answered with specific reference to the Indian Ocean and the current status and future of coral reef ecosystems: i) what are the effects of widespread coral mortality going to be in the Indian Ocean, ii) how long will it take for reef ecosystems to recover, and iii) will ‘recovered’ systems have the same structure and functional integrity? Research into these questions must bear in mind that most measurements to be made are points on a long-term trend. Although there may be another disturbance event similar to that of 1998, its occurrence (if it occurs) should not...
Tipo: Working Paper
Palavras-chave: Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/480

Effect of physico-chemical factors and human impacts on coral distribution at Tobia Kebir and Sharm el Loly, Red Sea, Egypt
Provedor de dados: 20
Autores: Ammar, M.S.A.; Mahmoud, M.A.
Using SCUBA equipment and the line intercept transect (LIT), the effect of physical factors and human impacts on coral distribution were studied in two Red Sea sites (Sharm El Loly and Tobia Kebir) throughout the period from September, 2003 to October, 2004. The percentage cover of coral species in Northern Sharm El Loly was higher than in Tobia Kebir which might be attributed to optimum temperature and better light intensity. Diving, swimming, boat anchoring and fish feeding by divers are the main human impacts decreasing the percentage cover of corals at Tobia Kebir but fishing seems to have no role due to its limited level. The lower recorded amount of dead corals at Sharm El Loly though it is highly affected by fishing boats, is due to the fact that...
Tipo: Journal Contribution
Palavras-chave: Chemical and Pollution Studies- Monitoring; Coral reefs; Sedimentation; Distribution; Coral reefs; Distribution; Sedimentation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_6926.
Ano: 2006
URL: http://hdl.handle.net/1834/1457

Observaciones de la ictiofauna de las Islas del Rosario
Provedor de dados: 20
Autores: Köster, F.
La lista de especies presentó una recopilación de las observaciones de peces, efectuadas entre el 10 y el 16 de mayo de 1977 en diferentes localidades de Islas del Rosario. La lista presentó una vista general de la ictiofauna relacionada en una u otra forma con las formaciones coralinas del archipielago Islas del Rosario.
Tipo: Journal Contribution
Palavras-chave: Marine fisheries; Coral reefs; Marine fisheries; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_4611; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 1979
URL: http://hdl.handle.net/1834/3944

Visual Census of the Reef Fishes in the Natural Reserve of the Glorieuses Islands (Western Indian Ocean)
Provedor de dados: 20
Autores: Durville, P.; Chabanet, P.; Quod, J.P.
This paper constitutes the first qualitative study of coral reef fish populations in the archipelago of the Glorieuses Islands (northern Mozambique Channel). Sampling by visual census techniques, at depths between 0 and 15 meters, was carried out at 30 stations spread over the whole reef. Three hundred and thirty-two (332) fish species belonging to 57 families were registered in this way. These relatively high numbers show that isolated coral reef formations, even of small size, can be endowed with a great specific richness of reef ichthyofauna. These results may be explained by an oceanic flow that favours recruitment, a diversified habitat, and low anthropogenic impact.
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Reef fish.
Ano: 2003
URL: http://hdl.handle.net/1834/958

Condición actual de las formaciones coralinas de Acropora palmata y A. cervicornis en el Parque Nacional Natural Tayrona (Colombia)
Provedor de dados: 20
Autores: Garzón-Ferreira, J.; Moreno-Bonilla, M.; Valderrama-Vásquez, J.M.
To assess the status of coral formations dominated by Acropora palmata (APF) and A. cervicornis (ACF) in the Tayrona National Natural Park (TNNP), Colombian Contribución No. 855 del Instituto de Investigaciones Marinas y Costeras – INVEMAR Caribbean, a study was conducted at the bays of Chengue, Gayraca, Nenguange and Cinto between May- December 2001. The distribution and extension of the formations in the study area were evaluated by swimming along the coast and using draft maps, a GPS and a calibrated flow-meter, and their living cover were estimated in quadrat-belt transects (1x10 m). Atotal of 29 APF (119320 m2) and 12 ACF (21760 m2) were assessed. Almost all the APF exhibited living colonies of A. palmata, but the mean cover by this species reached...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Conservation; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2004
URL: http://hdl.handle.net/1834/3067

Studies Of Bioerosion On Coral Reefs Of Tanzania
Provedor de dados: 20
Autores: Strömberg, H.
Historically, coral reefs have been subjected to a range of disturbances including major sedimentary events from flooded rivers (Robertson &amp; Lee Long, 1990), storm events and changes related to long-term patterns such as El Niño (Glynn, 1985). Reef ecologists have accumulated a great deal of evidence implicating disturbance as a major influence on reef ecology (Connell, 1978). Increasing global temperatures, eutrophication in coastal areas and the physical damage that is becoming so widespread is potentially reducing the reefs intrinsic ability to cope with such perturbations. Primary production on a reef is largely dependent on a variety of algae including the symbiotic algae living in hard corals (zooxanthellae). The level of production that any of...
Tipo: Report
Palavras-chave: Bioerosion; Coral reefs.
Ano: 2000
URL: http://hdl.handle.net/1834/484

Deficit of sand in a sediment transport model favors coral reef development in Brazil
Provedor de dados: 42
Autores: Bittencourt,Abílio C.S.P.; Leão,Zelinda M.A.N.; Kikuchi,Ruy K.P.; Dominguez,José M.L.
This paper shows that the location of the shoreface bank reefs along the northeastern and eastern coasts of Brazil, in a first order approximation, seem to be controlled by the deficit of sediment in the coastal system. The sediment transport pattern defined by a numerical modeling of wave refraction diagrams, representing circa 2000 km of the northeastern and eastern coasts of Brazil, permitted the regional-scale reproduction of several drift cells of net longshore sediment transport. Those drift cells can reasonably explain the coastal sections that present sediment surplus or sediment deficit, which correspond, respectively, to regions where there is deposition and erosion or little/no deposition of sand. The sediment deficit allows the exposure and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediment deficit; Longshore drift; Coral reefs; Northeast Brazil.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000100015

Population dynamics of Siderastrea stellata Verrill, 1868 from Rocas Atoll, RN: implications for predicted climate change impacts at the only South Atlantic atoll
Provedor de dados: 42
Autores: PINHEIRO,BARBARA R.; PEREIRA,NATAN S.; AGOSTINHO,PAULA G.F.; MONTES,MANUEL J.F.
ABSTRACT Coral reefs are one of the most vulnerable ecosystems to ocean warming and acidification, and it is important to determine the role of reef building species in this environment in order to obtain insight into their susceptibility to expected impacts of global changes. Aspects of the life history of a coral population, such as reproduction, growth and size-frequency can contribute to the production of models that are used to estimate impacts and potential recovery of the population, acting as a powerful tool for the conservation and management of those ecosystems. Here, we present the first evidence of Siderastrea stellata planulation, its early growth, population size-frequency distribution and growth rate of adult colonies in Rocas Atoll. Our...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Coral reefs; Rocas Atoll; Siderastrea stellata; South Atlantic Ocean.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300873

Ethnoecological knowledge of the artisan fishermen of octopi (Octopus spp.) in the community of Coroa Vermelha (Santa Cruz Cabrália, Bahia)
Provedor de dados: 42
Autores: Martins,Viviane S; Schiavetti,Alexandre; Souto,Francisco J. B.
Coral reefs are quite diverse ecosystems that carry out several ecological functions and plays a relevant socioeconomic role. The artisan fishing of octopi (Octopus spp.) is practiced for the survival of part of the inhabitants of Coroa Vermelha community, in the south of the state of Bahia. We intended to study the knowledge of the octopi fishermen of Coroa Vermelha using the comprehensive ethnoecological proposal of Marques. The data were collected between July, 2006 and April, 2008 through direct observation and from interviews with fishermen met by chance and through the "native specialists" criterion. Twenty semi-structured interviews were carried out following an itinerary of pre-established questions about the activity of octopi capture, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethnoecology; Artisan fishing; Coral reefs; Cephalopod.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200011

Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil
Provedor de dados: 49
Autores: Nunes,José de Anchieta Cintra da Costa; Medeiros,Diego Valverde; Reis-Filho,José Amorim; Sampaio,Cláudio Luis Santos; Barros,Francisco.
Although recreational spearfishing is a growing activity, its impacts are poorly understood. This paper aims to present data on reef fishes captured by recreational spearfishing in the Bahia State, Northeastern Brazil. We analyzed 168 photos of spearfishing conducted in the reefs of this region between 2006 and 2008. A total of 1.121 fish belonging to 48 species were captured in three sub-regions of the Bahia coastline: Litoral Norte (LN), Salvador (SSA) and Baixo Sul (BS). The main species caught were: Scomberomorus brasiliensis (n = 191), Sphyraena barracuda (n = 153), Lutjanus jocu (n = 150) and Caranx bartholomaei (n = 141); these four species represented 56.5% of total captures. Over the sampling period, the highest values of catch rates per day were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Overfishing; Coral reefs; Salvador; Litoral Norte; Baixo Sul.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100014

CONFIRMATION OF THE OCCURRENCE OF THE CORAL PAVONA CHIRIQUIENSIS GLYNN, MATÉ AND STEMANN (CNIDARIA: ANTHOZOA: AGARICIIDAE) IN THE COLOMBIAN PACIFIC
Provedor de dados: 50
Autores: Zapata,Fernando A; Rodríguez-Ramírez,Alberto; Rodríguez-Moreno,Melina; Muñoz,Carlos G; López-Victoria,Mateo.
El género Pavona comprende 18 especies de las cuales Pavona chiriquiensis ha sido recientemente descrita y registrada en varias localidades del Pacífico oriental tropical. A partir de observaciones y colecciones realizadas en arrecifes de las islas Gorgona y Malpelo entre 1999 y 2005 se confirma su presencia en Colombia. El tardío registro de P. chiriquiensis en estas islas pudo ser debido a su similitud y confusión con P. varians, o a su reciente colonización del Pacífico colombiano.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corals; Coral reefs; Tropical Eastern Pacific.
Ano: 2007
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612007000100014

ANNUAL SKELETAL EXTENSION OF TWO REEF-BUILDING CORALS FROM THE COLOMBIAN CARIBBEAN SEA
Provedor de dados: 50
Autores: Charry,Henry; Alvarado,Elvira M.; Sánchez,Juan A.
The skeletal growth of the scleractinian corals Diploria labyrinthiformis (Linnaeus 1758) and Montastraea annularis (Ellis and Solander 1786) from Isla Grande (north of Rosario islands), Colombian Caribbean, was determined from annual extension increments revealed by X-radiography of 4-6 mm thick slabs obtained along the axis of maximum growth. The skeletal extension average rate for the last 22 years for D. labyrinthiformis was 3.8 mm year-1 (SE 0.10; N = 87). The correlation between growth of D. labyrinthiformis and hours of sunlight was significantly negative. The annual variances of sunlight enhanced annual statistically significant differences of growth in this species. M. annularis showed an average extension growth of 10.6 mm year -1 (SE 0.32; N =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rates; Diploria labyrinthiformis; Montastraea annularis; Caribbean Sea; Colombia; Coral reefs.
Ano: 2004
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612004000100011

THE PHYSICAL ENVIRONMENT IN CORAL REEFS OF THE TAYRONA NATIONAL NATURAL PARK (COLOMBIAN CARIBBEAN) IN RESPONSE TO SEASONAL UPWELLING*
Provedor de dados: 50
Autores: Bayraktarov,Elisa; Bastidas-Salamanca,Martha L; Wild,Christian.
Coral reefs are subjected to physical changes in their surroundings including wind velocity, water temperature, and water currents that can affect ecological processes on different spatial and temporal scales. However, the dynamics of these physical variables in coral reef ecosystems are poorly understood. In this context, Tayrona National Natural Park (TNNP) in the Colombian Caribbean is an ideal study location because it contains coral reefs and is exposed to seasonal upwelling that strongly changes all key physical factors mentioned above. This study therefore investigated wind velocity and water temperature over two years, as well as water current velocity and direction for representative months of each season at a windand wave-exposed and a sheltered...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water current velocity and direction; ADCP; Upwelling; Coral reefs; Colombian Caribbean.
Ano: 2014
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612014000100007

Community structure of turf algae in interactions with massive corals in Tayrona National Natural Park, Colombian Caribbean
Provedor de dados: 50
Autores: Gómez-Cubillos,Catalina; Gavio,Brigitte; Zea,Sven.
ABSTRACT Algal turfs are currently the most abundant benthic component on most coral reefs. Their wide distribution, functional role and positive response to factors that stress corals confirm their importance in the functioning of reef ecosystem. It has been shown that species composition, structural development and sediment retention influence their capacity to kill and displace adjacent live coral tissue. In this study in two reefs of the Tayrona National Natural Park (Colombian Caribbean), the variation in structure of turfs growing on and in direct interaction with massive live corals was determined, and its structural complexity was related with its sediment retention capacity. For that, the taxonomical composition was determined, and canopy height,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coral reefs; Algal turfs; Interactions; Structure of algal assemblages; Sediment retention; Colombian Caribbean.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300045

Dynamics of the benthic community structure on the shallow coral formations of the San Bernardo Archipelago, Colombian Caribbean
Provedor de dados: 50
Autores: Vega-Sequeda,Johanna; Agudelo-Ramírez,Claudia; Mendoza-Mazzeo,Álvaro; Sanjuan-Muñoz,Adolfo.
ABSTRACT Coral reefs have experienced an extensive degradation over the last decades as a result of anthropogenic and natural disturbances. This study presents an historical characterization (1989-2015) of changes in composition of the substrate in coral formations in the San Bernardo Archipelago. In addition, in 2015 coral reef health (presence of deterioration signs) was evaluated, and satellite temperature data were analyzed. In general, coral cover showed a stable trend between 1989 and 2010. The observed differences in the coral reef formations in 2013 and 2015 could have been due to the increase in coverage of species of the genus Orbicella, Porites, Agaricia, Siderastrea and the hydrocoral Millepora complanata. The lower coverage in 1989, 1991 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coral reefs; Coral monitoring; Reef cover; Corales del Rosario y San Bernardo Natural National Park; Colombian Caribbean.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300167

AN INSIGHT INTO THE ECONOMIC VALUE OF REEF ENVIRONMENTS THROUGH THE LITERATURE: THE CASE OF THE SEAFLOWER BIOSPHERE RESERVE
Provedor de dados: 50
Autores: Londoño-Díaz,Luz; Vargas-Morales,Myriam.
The Seaflower Biosphere Reserve (SBR) is one of the few places in Colombia with a set of available studies on the economic value of its reef environments. This paper seeks to review the policy applications of these studies, and evaluate the use of benefit transfer (BT) methods to predict value estimates for sites in the SBR where no valuations have been performed. First, the paper provides an analysis and categorization of policy uses of existing results. A set of economic valuation studies were identified as somewhat influential in policy applications, because they provided financial sustainability tools for marine protected areas. A case study was selected from the pool of influential studies in order to assess the viability of BT. Second, the viability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Archipelago of San Andrés; Old Providence and Santa Catalina; Economic valuation; Benefit transfer; Coral reefs; Decision-making.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612015000100005

Ecological shallow water delimitation of the Serrana, Roncador, and Quitasueño Atolls of the Seaflower Biosphere Reserve in the Colombian Caribbean
Provedor de dados: 50
Autores: Millán,Santiago; García-Valencia,Carolina.
ABSTRACT In order to contribute to the sea bottoms knowledge of the Seaflower Biosphere Reserve (RB Seaflower), a mapping update was made at 1:50,000 scale of the Seascape Ecological Units (SEU) for the Serrana, Roncador and Quitasueño atolls, based on the processing and interpretation of ALOS AVNIR - 2 satellite images acquired in 2012. For the attribute assignation was used as reference cartographic products, fieldwork data, and ecological descriptions of the benthic community. A total of 138,967 ha and 30 SEU, which corresponds to 32,908 ha for Serrana, 4,861 to Roncador and 101,198 to Quitasueño. The products generated represents a good approximation of the location, extension and distribution of the benthic seascape elements, constituting the base...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marine atlas; Ecological units; Coral reefs; Cartography.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000100197

Hydrology, plankton, and corals of the Maracajaú reefs (Northeastern Brazil): an ecosystem under severe thermal stress
Provedor de dados: 52
Autores: Mayal,Elga Miranda; Neumann-Leitão,Sigrid; Feitosa,Fernando Antônio do Nascimento; Schwamborn,Ralf; Silva,Tâmara de Almeida e; Silva-Cunha,Maria da Glória Gonçalves da.
This study provides baseline information on the hydrological conditions and on the coral and plankton communities at the Maracajaú reef ecosystem (Northeastern Brazil). Studies were performed from February to June 2000, covering the transition from dry to rainy season. In this area, there is an offshore coral reef formation, where corals were observed in loco; the water samples were collected to obtain the hydrological and plankton data. Six scleractinian species were identified. Stable isotope analysis on the carbonate fraction of Favia gravida fragments showed that these corals were under severe thermal stress. Chlorophyll-a varied from 1.1 to 9.3 mg m-3, with higher values during the rainy season. Average zooplankton wet weight biomass were 117.0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coral reefs; Hydrology; Plankton; Thermal stress; Human impacts.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300019