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| Registros recuperados: 203 | |
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| 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 “messiness” 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 |
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| 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– Ecological systems. |
| Ano: 2011 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 203 | |
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