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Auteur Tedesco, P.A.; Leprieur, F.; Hugueny, B.; Brosse, S.; Dürr, H.H.; Beauchard, O.; Busson, F.; Oberdorff, T.
Titre Patterns and processes of global riverine fish endemism Type Article scientifique
Année (down) 2012 Publication Revue Abrégée Global Ecology and Biogeography
Volume 21 Numéro 10 Pages 977-987
Mots-Clés Dispersal ability; freshwater fish; glacial maximum; global distribution; island biogeography; isolation; neo-endemism; palaeo-endemism; speciation
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Editeur Lieu de Publication Éditeur
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Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 1466-8238 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 776
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Auteur Pommier, T.; Douzery, E.J.P.; Mouillot, D.
Titre Environment drives high phylogenetic turnover among oceanic bacterial communities Type Article scientifique
Année (down) 2012 Publication Revue Abrégée Biol. Lett.
Volume 8 Numéro 4 Pages 562-566
Mots-Clés Biogeography; connectivity; diversity; dynamics; patterns; phylogenetic turnover
Résumé Although environmental filtering has been observed to influence the biodiversity patterns of marine bacterial communities, it was restricted to the regional scale and to the species level, leaving the main drivers unknown at large biogeographic scales and higher taxonomic levels. Bacterial communities with different species compositions may nevertheless share phylogenetic lineages, and phylogenetic turnover (PT) among those communities may be surprisingly low along any biogeographic or environmental gradient. Here, we investigated the relative influence of environmental filtering and geographical distance on the PT between marine bacterial communities living more than 8000 km apart in contrasted abiotic conditions. PT was high between communities and was more structured by local environmental factors than by geographical distance, suggesting the predominance of a lineage filtering process. Strong phenotype-environment mismatches observed in the ocean may surpass high connectivity between marine microbial communities.
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Auteur institutionnel Thèse
Editeur Lieu de Publication Éditeur
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 1744-9561 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 567
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Auteur Demarcq, H.; Reygondeau, G.; Alvain, S.; Vantrepotte, V.
Titre Monitoring marine phytoplankton seasonality from space Type Article scientifique
Année (down) 2012 Publication Revue Abrégée Remote Sensing of Environment
Volume 117 Numéro Pages 211-222
Mots-Clés Biogeography; Phytoplankton; Phytoplankton Functional; remote sensing; seasonality; Seasonal parameters; Surface chlorophyll concentration; Types; Wavelet transform
Résumé Remote sensing techniques are used to study the large scale patterns related to the seasonal modes of variability of the marine phytoplankton. Ten years of monthly composite maps of sea surface chlorophyll-a concentration and the PHYSAT database of four Phytoplanktonic Functional Types (PFTs), both from SeaWiFS, are used to investigate characteristics of phytoplankton seasonality in the trades and westerlies wind oceanic biomes, where data density is adequate. We use a combination of wavelet transform and statistical techniques that allow us to quantify both intensity and duration of the seasonal oscillation of chlorophyll-a concentration and PFTs relative occurrence, and to map these relationships. Next, the seasonal oscillations detected are related to four PFTs revealing six major global phytoplanktonic associations. Our results elucidate the intensity and duration of the seasonal dynamic of the chlorophyll-a concentration and of the relative occurrence of four PFTs at a global scale. Thus, the typology of the different types of seasonality is investigated. Finally, an overall agreement between the results and the biogeochemical provinces partition proposed by Longhurst is found, revealing a strong environmental control on the seasonal oscillation of primary producers and a clear latitudinal organization in the succession of the phytoplankton types. Results provided in this study quantify the seasonal oscillation of key structural parameters of the global ocean, and their potential implications for our understanding of ecosystem dynamics.
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ISSN 0034-4257 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 182
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Auteur REYGONDEAU, G.; MAURY, O.; BEAUGRAND, G.; FROMENTIN, J.-M.; FONTENEAU, A.; CURY, P.
Titre Biogeography of tuna and billfish communities Type Article scientifique
Année (down) 2012 Publication Journal Of Biogeography Revue Abrégée
Volume 39 Numéro 1 Pages 114-129
Mots-Clés Biogeochemical provinces; global ocean; Istiophorus; Katsuwonus; macroecology; Makaira; marine biogeography; Tetrapturus; Thunnus; Xiphias
Résumé Aim The aims of this study were: (1) to identify global communities of tuna and billfish species through quantitative statistical analyses of global fisheries data; (2) to describe the spatial distribution, main environmental drivers and species composition of each community detected; and (3) to determine whether the spatial distribution of each community could be linked to the environmental conditions that affect lower trophic levels by comparing the partitions identified in this study with Longhursts biogeochemical provinces. Location The global ocean from 60 degrees S to 65 degrees N. Methods We implemented a new numerical procedure based on a hierarchical clustering method and a nonparametric probabilistic test to divide the oceanic biosphere into biomes and ecoregions. This procedure was applied to a database that comprised standardized data on commercial longline catches for 15 different species of tuna and billfish over a period of more than 50 years (i.e. 1953-2007). For each ecoregion identified (i.e. characteristic tuna and billfish community), we analysed the relationships between species composition and environmental factors. Finally, we compared the biogeochemical provinces of Longhurst with the ecoregions that we identified. Results Tuna and billfish species form nine well-defined communities across the global ocean. Each community occurs in regions with specific environmental conditions and shows a distinctive species composition. High similarity (68.8% homogeneity) between the spatial distribution of the communities of tuna and billfish and the biogeochemical provinces suggests a strong relationship between these species and the physical and chemical characteristics of the global ocean. Main conclusions Despite their high tolerance for a wide range of environmental conditions, these highly migratory species are partitioned into clear geographical communities in the ocean at a global scale. The similarity between biogeochemical and biotic divisions in the ocean suggests that the global ocean is a mosaic of large biogeographical ecosystems, each characterized by specific environmental conditions that have a strong effect on the composition of the trophic web.
Adresse IFREMER, Ctr Rech Halieut Mediterraneennes & Trop, UMR EME 212, F-34203 Sete, France.
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Editeur Wiley-blackwell Lieu de Publication Éditeur
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Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0305-0270 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ 17141 collection 1002
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Auteur Charmantier, G.; Anger, K.
Titre Ontogeny of osmoregulatory patterns in the South American shrimp Macrobrachium amazonicum: Loss of hypo-regulation in a land-locked population indicates phylogenetic separation from estuarine ancestors Type Article scientifique
Année (down) 2011 Publication Revue Abrégée Journal of Experimental Marine Biology and Ecology
Volume 396 Numéro 2 Pages 89-98
Mots-Clés Biogeography; Crustacea; Life-history adaptations; Osmoregulation; ontogeny; speciation
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Volume de collection Numéro de collection Edition
ISSN 0022-0981 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 757
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