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| Registros recuperados: 24 | |
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| Amand, Marion; Pelletier, Dominique; Ferrari, Jocelyne; Kulbicki, Michel. |
| Marine Protected Areas (MPA) are often contemplated as a tool for the sustainable management of exploited resources and ecosystem conservation. This paper proposes an approach to establish a statistical diagnostic of the effects of MPAs on fish assemblages, and define corresponding ecological indicators. This requires choosing relevant variables (abundance, diversity, demographic parameters..) and appropriate statistical methods. The study was based on data from the Abore reef Reserve in New Caledonia. Two sets of methods: 1-inferential linear models (ANOVA, GLM): 2- Partial Least Squares (PLS) methods of regression, were used to test the effects of this MPA. PLS enabled us to test simultaneously within a model, density, species richness, biomass and mean... |
| Tipo: Text |
Palavras-chave: New Caledonia; PLS regression; Ecological indicators; Fishing impact; Coral reef; Fish; Marine Protected Areas. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-398.pdf |
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| Lison De Loma, Thierry; Harmelin-vivien, Mireille; Naim, Odile; Fontaine, Marie France. |
| There has, as yet, been little study of nutrient disturbance and its consequences on the functional biology of primary consumers in coral reefs. The processing of epilithic algal communities by the damselfish Stegastes nigricans was investigated at La Reunion, at two sites of a fringing reef, oligotrophic for one and eutrophic for the other. Differences between sites were analyzed in quantifying organic matter, organic carbon, nitrogen, and organic 'nutrients' (carbohydrate, lipid and protein) in the algal food, the digestive contents and the faeces of S. nigricans. In the disturbed site, algal turfs and digestive contents presented significantly higher organic matter, organic carbon, nitrogen and organic nutrient values. Absorption efficiency of total... |
| Tipo: Text |
Palavras-chave: Régime herbivore; Stegastes; Récif corallien; Eutrophisation; La Réunion; Herbivory; Stegastes; Coral reef; Eutrophication; La Reunion. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00323/43376/42835.pdf |
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| Chauvaud, S; Bouchon, C; Maniere, R. |
| In the framework of a comprehensive study of the coastal marine ecosystems of Guadeloupe Island (French West Indies), a remote sensing survey of marine communities was conducted in the Bay of the Grand Cul-de-Sac Marin. Pictures of SPOT satellite were used. At first sight, XS data from SPOT did not seem to be well adapted to extract information from deepest underwater areas. In the present study, a method for analysis of XS data was developed, which increases tenuous spectral differences associated to very low intensity signals. This technique led to a better distinction of objects, even the deepest ones. Reference surfaces were then identified in the field and a reliable supervised classification was conducted, which reflected the high diversity of... |
| Tipo: Text |
Palavras-chave: Télédétection; Cartographie; Récif corallien; Phanérogame marine; Mangrove; Remote sensing; Mapping; Coral reef; Seagrass; Mangrove. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00291/40267/38646.pdf |
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| Feng, Ellias Y.; Keller, David P.; Koeve, Wolfgang; Oschlies, Andreas. |
| Artificial ocean alkalinization (AOA) is investigated as a method to mitigate local ocean acidification and protect tropical coral ecosystems during a 21st century high CO2 emission scenario. Employing an Earth system model of intermediate complexity, our implementation of AOA in the Great Barrier Reef, Caribbean Sea and South China Sea regions, shows that alkalinization has the potential to counteract expected 21st century local acidification in regard to both oceanic surface aragonite saturation Omega and surface pCO(2). Beyond preventing local acidification, regional AOA, however, results in locally elevated aragonite oversaturation and pCO(2) decline. A notable consequence of stopping regional AOA is a rapid shift back to the acidified conditions of... |
| Tipo: Text |
Palavras-chave: Coral reef; Geoengineering; Ocean alkalinization; Ocean acidification; Climate engineering; Weathering enhancement. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00383/49417/49879.pdf |
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| Rolfe, John; Windle, Jill; Bennett, Jeffrey W.. |
| Designing a choice modelling (CM) experiment to place a value on increasing protection of the Great Barrier Reef (GBR) raises complex issues. The size and diversity of the GBR, and the number of different pressures impacting on it, mean protection and improvement scenarios can be drafted in several different ways. This report discusses some of the considerations in selecting, describing and combining choice attributes. It also looks at how to incorporate tests for geographic scale (size) and scope (complexity) differences into the design of the CM survey instrument. The potential to include information about management options designed to achieve increased protection, and the associated risk and uncertainty, is also discussed. |
| Tipo: Report |
Palavras-chave: Choice modelling; Scale; Scope; Coral reef; Environmental Economics and Policy; Research Methods/ Statistical Methods. |
| Ano: 2008 |
URL: http://purl.umn.edu/94802 |
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| Andersson, Andreas J.; Venn, Alexander A.; Pendleton, Linwood; Brathwaite, Angelique; Camp, Emma; Cooley, Sarah; Gedhill, Dwight; Koch, Marguerite; Maliki, Samir; Manfrino, Carrie. |
| The Caribbean and Western Atlantic region hosts one of the world’s most diverse geopolitical regions and a unique marine biota distinct from tropical seas in the Pacific and Indian Oceans. While this region varies in human population density, GDP and wealth, coral reefs, and their associated ecosystem services, are central to people’s livelihoods. Unfortunately, the region’s reefs have experienced extensive degradation over the last several decades. This degradation has been attributed to a combination of disease, overfishing, and multiple pressures from other human activities. Furthermore, the Caribbean region has experienced rapid ocean warming and acidification as a result of climate change that will continue and accelerate throughout the 21st century.... |
| Tipo: Text |
Palavras-chave: Caribbean; Coral reef; Restoration; Climate change; Ocean acidification; Ecosystem services. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00495/60684/64180.pdf |
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| Kragt, Marit Ellen; Roebeling, Peter C.; Ruijs, Arjan. |
| Agricultural run-off from the Great Barrier Reef catchment area may cause degradation of coral reefs, affecting the tourism sector that relies on healthy reefs for its income generation. A Contingent Behaviour approach is used to determine the effect of reef degradation on demand for recreational dive and snorkel trips, for a case study of the Great Barrier Reef (GBR) in Australia. We assessed how reef degradation affects GBR tourism and to what extent reef-trip demand depends on the visitors' socio-economic characteristics. A count data model is developed, and results indicate that an average visitor would undertake about 60% less trips to the GBR per year, given a combined 80%, 30% and 70% decrease in coral cover, coral diversity and fish diversity,... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Coral reef; Recreation; Contingent Behaviour model; Count data models; Resource /Energy Economics and Policy; Q26; Q51; Q57. |
| Ano: 2006 |
URL: http://purl.umn.edu/25753 |
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| Araya-Vargas,Alexander; Busutil,Linnet; García-Rojas,Andrea; Pereira-Chaves,José Miguel; Piedra-Castro,Liliana. |
| ABSTRACT Marine sponges fulfill many critical functions to coral reefs. In turn, variations in the community structure of the poriferans may indicate changes in the environmental conditions of the ecosystems where they live. However, their study has been scarce in the Caribbean of Costa Rica, mainly in the ecological field. Therefore, the community structure of these organisms was evaluated in four reef patches (Perezoso, Pequeño, Coral Garden, and the 0.36) and it was determined whether it could be explained by sedimentation, substrate, and depth. Relative abundance (RA) and relative coverage (RC) for each species, sponge density, and diversity indices (species richness, Shannon heterogeneity, Pielou's evenness, and Simpson's dominance) were calculated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porifera; Coral reef; Sedimentation; Substrate; Depth. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000100039 |
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| Londoño-Cruz,Edgardo. |
| ABSTRACT Holothurians correspond to 20-25 % of all known species of echinoderms. In the Colombian Pacific, 34 species have been recorded, of which 11 have been recorded on Gorgona Island. This is the first report of the lion’s paw sea-cucumber Euapta godeffroyi on the island. The specimen was collected by scuba diving in the subtidal coralline patch known locally as El Arrecifito del Muelle, at a depth of approximately 2 m. It was about 80 cm long and between 2 and 3 cm in diameter. The ossicles of the body wall basically correspond to anchors and anchor plates; the latter have tiny ramifications at the base of the central axis. The present report fills a gap in the distribution of this species for the Tropical Eastern Pacific. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Distribution; Coral reef; Biodiversity; Echinoderms.. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300229 |
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| RAMÍREZ-GUTIÉRREZ,MARTÍN; TAPIA-GARCÍA,MARGARITO; RAMOS-SANTIAGO,EDUARDO; ULLOA,RAÚL. |
| San Agustín bay is one of the most important bays in the Huatulco National Park because it includes the broadest coral reef surface of this park, which supports a great diversity of fish species. The importance of the present work is that describes quantitatively, for first time, the fish assemblage of this reef area. Visual censuses were realized on transects, according to the coral reef size, on coral and rocky reefs, and coral rubble environments. 64 species, 46 genus and 29 families were registered. Seasonal variation in fish assemblage was observed; reflecting the influence of pelagic shoaling species associated with the Gulf of Tehuantepec upwelling, during the dry season. Thus species were Selar crumenophthalmus, Caranx caninus, and Sardinops... |
| Tipo: Journal article |
Palavras-chave: Huatulco National Park; Coral reef; Diversity; Density; Community. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400003 |
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| Jorry, Stephan; Jouet, Gwenael; Edinger, Evan N.; Toucanne, Samuel; Counts, John W.; Miramontes, Elda; Courgeon, Simon; Riveiros, Natalia Vázquez; Le Roy, Pascal; Camoin, Gilbert F.. |
| Over the past ten years, a huge amount of source-to-sink studies have aimed to unravel the tectonic, climatic and other processes that shape the landscape from mountains to the deep ocean. Interestingly, these studies have been mainly dedicated to siliciclastic or mixed systems, for which the connection between drainage basins, continental shelves, slope and basin environments are often well constrained. Here we present a study focusing on a source-to-sink study dedicated to a pure carbonate system, located in the SW Indian Ocean (Glorieuses archipelago). Extensive field sampling and geophysical acquisition across the carbonate platform have allowed us to estimate the composition, the lateral variability, and volumes of neritic sands deposited on the... |
| Tipo: Text |
Palavras-chave: Carbonate platform; Coral reef; Calciturbidite; Aragonite; Carbonate budget; Indian Ocean. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71879/70574.pdf |
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| Loubersac, Lionel; Dahl, Arthur; Collote, Pascal; Lemaire, Olivier; D'Ozouville, Laurent. |
| Damage from tropical cyclones can have major consequences for coral reef structure and ecology, as well as for human communities and human uses of coral reef resources. Remote sensing with high resolution multispectral satellite images can be used to asses large scale cyclone damages on coral reef areas. SPOT images of the almost atoll of AITUTAKI (Cook Islands) taken in june 1986 and february 1987 after the passage of Cyclone Sally near the island in january, were transformed and subjected to a textural analysis, and then compared to asses damage on the reefs and lagoon.New shallow sand and rubble deposits showed increased reflectance, while lower reflectance seemed associated with damage to reef structure, scouring in the lagoon, deposits of terrestrial... |
| Tipo: Text |
Palavras-chave: ICRS 6; Remote sensing; Reflectance; Stresses; Cyclones; Extreme events; Coral reef; Lagoon; Natural System; External Threats & Opportunities. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00143/25380/23518.pdf |
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| Zubia, M; Peyrot-clausade, M. |
| Bioerosion by grazing and boring organisms is one of the major destructive forces operating on reef. The aim of this study was to estimate the intensity of internal bioerosion by both microflora and fauna of Acropora, a branching scleractinian, on the reef flat at La Saline (Reunion, Indian Ocean). Internal bioerosion was estimated at two sites, varying in degrees of eutrophication. At each site, dead Acropora subjected to heavy grazing or covered by algal turf were examined. Acropora formosa is subjected to high bioerosion due to its high porosity and its branching form, which facilitates colonisation by boring organisms. Three endolithic microflora species, Plectonema terebrans, Mastigocoleus testarum and Ostreobium queckettii colonised the branches. The... |
| Tipo: Text |
Palavras-chave: Acropora; Bioérosion; Organismes perforants; Récifs coralliens; Océan Indien; Acropora; Bioerosion; Boring organisms; Coral reef; Indian Ocean. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43353/42860.pdf |
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| Stiger-pouvreau, Valerie; Zubia, Mayalen. |
| This review focuses on the diversity of French tropical overseas macroalgae and their biotechnological applications. After listing the specific diversity, i.e. 641 species in French Antilles in the Atlantic Ocean, 560 species in the Indian Ocean, and 1015 species in the South Pacific Ocean, we present the potential of their metabolites and their main uses. Among the great diversity of metabolites, we focus on carbohydrates, proteins, lipids, pigments and secondary metabolites, in particular terpenes and phenolic compounds. The main applications of reef macroalgae are described in human and animal consumptions, phycocolloids extraction, production of active ingredients for health, cosmetics, agriculture, and bioremediation. For each application, we list... |
| Tipo: Text |
Palavras-chave: Biotechnological applications; Coral reef; Diversity; French territories; Seaweeds. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00605/71684/70125.pdf |
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| Chancerelle, Y. |
| This study presents an original method for the determination of the actual surface area of Scleractinian corals at colony-scale and at the scale of a whole reef. Firstly, at colony-scale, the technique consists of dipping coral colonies in a liquid paraffin bath and measuring the weight of the coral before and after the dipping. It is based on the relationship between the weight and the surface area of paraffin deposited and allows one to obtain the actual surface area of coral colonies in the laboratory. The main advantages of this method compared to others is that it uses easily obtainable materials and it is adaptable to all colony shapes. It was used on coral colonies representing the six most frequently seen colony shapes on the reefs of the island of... |
| Tipo: Text |
Palavras-chave: Surface développée; Colonie corallienne; Récif corallien; Actual surface area; Coral colony; Coral reef. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00325/43571/44052.pdf |
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| Cedro,Victor Ribeiro; Hajdu,Eduardo; Correia,Monica Dorigo. |
| The Porifera occurring at Alagoas State reefs (north-eastern Brazil) are still little-known, with few species listed and even fewer formally described. From a total of 48 species recorded from the state, only eight belong to the Poecilosclerida, including those (re)described in this study. Here we describe a new species, Mycale (Mycale) alagoana sp.nov., and redescribe two species: Lissodendoryx (Lissodendoryx) isodictyalis (Carter, 1882) and Mycale (Naviculina) diversisigmata Van Soest, 1984, both first formal redescriptions from the Southwestern Atlantic. Additionally, Mycale (Aegogropila) escarlatei Hajdu et al., 1995 is here reported from Alagoas for the first time, in discussing the difficulties inherent to recognition in the field of small crustose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Faunistics; Lissodendoryx; Coral reef; Sandstone reef; Taxonomy. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100016 |
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| Malay, Maria Celia (machel) D.; Paulay, Gustav. |
| The diversity on coral reefs has long captivated observers. We examine the mechanisms of speciation, role of ecology in speciation, and patterns of species distribution in a typical reef-associated clade-the diverse and colorful Calcinus hermit crabs-to address the origin of tropical marine diversity. We sequenced COI, 16S, and H3 gene regions for similar to 90% of 56 putative species, including nine undescribed, "cryptic" taxa, and mapped their distributions. Speciation in Calcinus is largely peripatric at remote locations. Allopatric species pairs are younger than sympatric ones, and molecular clock analyses suggest that > 2 million years are needed for secondary sympatry. Substantial niche conservatism is evident within clades, as well as a few major... |
| Tipo: Text |
Palavras-chave: Allopatric speciation; Biodiversity; Biogeography; Color pattern evolution; Circumtropical speciation; Coral reef; Coral triangle; Cryptic species; Crustacea; ESU; Indo-Malayan hot spot; Molecular phylogenetics; Sympatric speciation. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00495/60623/64108.pdf |
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| Registros recuperados: 24 | |
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