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Auteur (up) Coll, M.; Steenbeek, J.; Lasram, F.B.; Mouillot, D.; Cury, P. url  doi
openurl 
  Titre 'Low-hanging fruit' for conservation of marine vertebrate species at risk in the Mediterranean Sea Type Article scientifique
  Année 2015 Publication Frontiers in Microbiology Revue Abrégée  
  Volume 24 Numéro 2 Pages 226-239  
  Mots-Clés Conservation priorities; cumulative threats; IUCN diversities; marine biodiversity; Marine Protected Areas; Mediterranean Sea  
  Résumé AimConservation priorities need to take the feasibility of protection measures into account. In times of economic pressure it is essential to identify the low-hanging fruit' for conservation: areas where human impacts are lower and biological diversity is still high, and thus conservation is more feasible. LocationWe used the Mediterranean large marine ecosystem (LME) as a case study to identify the overlapping areas of low threats and high diversity of vertebrate species at risk. MethodsThis LME is the first in the world to have a complete regional IUCN Red List assessment of the native marine fish. We augmented these data with distributions of marine mammals, marine turtles and seabirds at risk, and we calculated the spatial distributions of species at risk (IUCN densities). Using cumulative threats we identified priority areas for conservation of species at risk' (PACS), where IUCN diversities are high and threats are low. We assessed whether IUCN diversities and PACS were spatially congruent among taxa and we quantified whether PACS corresponded to current and proposed protected areas. ResultsIUCN densities and PACS were not highly correlated spatially among taxa. Continental shelves and deep-sea slopes of the Alboran Sea, western Mediterranean and Tunisian Plateau/Gulf of Sidra are identified as relevant for fish species at risk. The eastern side of the western Mediterranean and the Adriatic Sea are identified as most relevant for endemic fish, and shelf and open sea areas distributed through the LME are most important for marine mammals and turtles at risk, while specific locations of the western Mediterranean Sea and the Aegean and Levantine seas are highlighted for seabirds. Main conclusionsLarge parts of the areas of PACS fell outside current or proposed frameworks to be prioritized for conservation. PACS may be suitable candidates for contributing to the 10% protection target for the Mediterranean Sea by 2020.  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1102  
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Auteur (up) Collet, A.; Durand, J.-D.; Desmarais, E.; Cerqueira, F.; Cantinelli, T.; Valade, P.; Ponton, D. doi  openurl
  Titre DNA barcoding post-larvae can improve the knowledge about fish biodiversity: an example from La Reunion, SW Indian Ocean Type Article scientifique
  Année 2018 Publication Revue Abrégée Mitochondrial DNA Part A  
  Volume 29 Numéro 6 Pages 905-918  
  Mots-Clés DNA barcoding; estimating diversity; fauna; fish larvae; ichthyoplankton; island; Mascarene Archipelago; reef; species richness  
  Résumé The aim of this study was to demonstrate that fish larvae identified using their COI sequences offer a unique opportunity for improving the knowledge of local fish richness. Fish larvae were sampled at the end of their pelagic phase using light-traps set off the West Coast of La Reunion Island, southwestern Indian Ocean, once per month from October 2014 to March 2015. Among the 5174 larvae caught, 214 morphologically different specimens were selected, 196 successfully barcoded, giving a total of 101 different Barcode Index Numbers (BINs). Among these BINs, 55 had never been recorded in La Reunion exclusive economic zone (EEZ), and 13 were new for the BOLD database. Even if the sampling effort for collecting fish post-larvae during this study was relatively low, it allowed adding at least nine new species to an updated checklist of fishes of La Reunion EEZ.  
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  ISSN 2470-1394 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 2394  
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Auteur (up) Cormier-Salem, M.-C.; Van Trai, N.; Burgos, A.; Durand, J.-D.; Bettarel, Y.; Klein, J.; Duc Huy, H.; Panfili, J. url  doi
openurl 
  Titre The mangrove's contribution to people: Interdisciplinary pilot study of the Can Gio Mangrove Biosphere Reserve in Viet Nam Type Article scientifique
  Année 2017 Publication Revue Abrégée Comptes Rendus Geoscience  
  Volume 349 Numéro 6 Pages 341-350  
  Mots-Clés Mangrove; Biodiversity; Coastal environment; Ecosystem services; Interdisciplinary framework; Local knowledge  
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  ISSN 1631-0713 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 2231  
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Auteur (up) Cowart, D.A.; Durand, L.; Cambon-Bonavita, M.-A.; Arnaud-Haond, S. doi  openurl
  Titre Investigation of bacterial communities within the digestive organs of the hydrothermal vent shrimp Rimicaris exoculata provide insights into holobiont geographic clustering Type Article scientifique
  Année 2017 Publication Revue Abrégée PLoS One  
  Volume 12 Numéro 3 Pages e0172543  
  Mots-Clés alignment; chamber; deposits; diversity; Ecology; microbial community; mid-atlantic ridge; population; sequence data; sp nov.  
  Résumé Prokaryotic communities forming symbiotic relationships with the vent shrimp, Rimicaris exoculata, are well studied components of hydrothermal ecosystems at the Mid-Atlantic Ridge (MAR). Despite the tight link between host and symbiont, the observed lack of spatial genetic structure seen in R. exoculata contrasts with the geographic differentiation detected in specific bacterial ectosymbionts. The geographic clustering of bacterial lineages within a seemingly panmictic host suggests either the presence of finer scale restriction to gene flow not yet detected in the host, horizontal transmission (environmental selection) of its endosymbionts as a consequence of unique vent geochemistry, or vertically transmitted endosymbionts that exhibit genetic differentiation. To identify which hypothesis best fits, we tested whether bacterial assemblages exhibit differentiation across sites or host populations by performing a 16S rRNA metabarcoding survey on R. exoculata digestive prokaryote samples (n = 31) taken from three geochemically distinct vents across MAR: Rainbow, Trans-Atlantic Geotraverse (TAG) and Logatchev. Analysis of communities across two organs (digestive tract, stomach), three molt colors (white, red, black) and three life stages (eggs, juveniles, adults) also provided insights into symbiont transmission mode. Examining both whole communities and operational taxonomic units (OTUs) confirmed the presence of three main epibionts: Epsilonproteobacteria, Mollicutes and Deferribacteres. With these findings, we identified a clear pattern of geographic segregation by vent in OTUs assigned to Epsilonproteobacteria. Additionally, we detected evidence for differentiation among all communities associated to vents and life stages. Overall, results suggest a combination of environmental selection and vertical inheritance of some of the symbiotic lineages.  
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  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1932-6203 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 2085  
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Auteur (up) Cucherousset, J.; Villeger, S. url  doi
openurl 
  Titre Quantifying the multiple facets of isotopic diversity: New metrics for stable isotope ecology Type Article scientifique
  Année 2015 Publication Revue Abrégée Ecological Indicators  
  Volume 56 Numéro Pages 152-160  
  Mots-Clés biodiversity; Bioindication; communities; diversity indices; food web; Populations; stable isotope analyses; Trophic diversity  
  Résumé Abstract

Stable isotope analyses have emerged as an insightful tool for ecologists, with quantitative methods being developed to analyse data at the population, community and food web levels. In parallel, functional ecologists have developed metrics to quantify the multiple facets of functional diversity in a n-dimensional space based on functional traits. Here, we transferred and adapted metrics developed by functional ecologists into a set of four isotopic diversity metrics (isotopic divergence, dispersion, evenness and uniqueness) complementary to the existing metrics. Specifically, these new metrics are mathematically independent of the number of organisms analysed and account for the abundance of organisms. They can also be calculated with more than two stable isotopes. In addition, we also provide a procedure for calculating the levels of isotopic overlap (similarity and turnover) between two groups of organisms. These metrics have been implemented into new functions in R made freely available to users and we illustrated their application using stable isotope values from a freshwater fish community. Transferring the framework developed initially for measuring functional diversity to stable isotope ecology will allow more efficient assessments of changes in the multiple facets of isotopic diversity following anthropogenic disturbances.
 
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  ISSN 1470-160x ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 1361  
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