|   | 
Détails
   web
Enregistrements
Auteur Reygondeau, G.; Longhurst, A.; Martinez, E.; Beaugrand, G.; Antoine, D.; Maury, O.
Titre Dynamic biogeochemical provinces in the global ocean Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Global Biogeochemical Cycles
Volume 27 Numéro 4 Pages 1046-1058
Mots-Clés biogeochemical province; Biogeography; biome; meteo-oceanic oscillations; seasonality
Résumé In recent decades, it has been found useful to partition the pelagic environment using the concept of biogeochemical provinces, or BGCPs, within each of which it is assumed that environmental conditions are distinguishable and unique at global scale. The boundaries between provinces respond to features of physical oceanography and, ideally, should follow seasonal and interannual changes in ocean dynamics. But this ideal has not been fulfilled except for small regions of the oceans. Moreover, BGCPs have been used only as static entities having boundaries that were originally established to compute global primary production. In the present study, a new statistical methodology based on non-parametric procedures is implemented to capture the environmental characteristics within 56 BGCPs. Four main environmental parameters (bathymetry, chlorophyll a concentration, surface temperature, and salinity) are used to infer the spatial distribution of each BGCP over 1997–2007. The resulting dynamic partition allows us to integrate changes in the distribution of BGCPs at seasonal and interannual timescales, and so introduces the possibility of detecting spatial shifts in environmental conditions.
Adresse
Auteur institutionnel Thèse
Editeur Lieu de Publication Éditeur
Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 1944-9224 ISBN Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel LL @ pixluser @ collection 279
Lien permanent pour cet enregistrement
 

 
Auteur Péron, C.; Gremillet, D.; Prudor, A.; Pettex, E.; Saraux, C.; Soriano-Redondo, A.; Authier, M.; Fort, J.
Titre Importance of coastal Marine Protected Areas for the conservation of pelagic seabirds: The case of Vulnerable yelkouan shearwaters in the Mediterranean Sea Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Biological Conservation
Volume 168 Numéro Pages 210-221
Mots-Clés Aerial surveys; At-sea observations; Biotelemetry; Conservation biogeography; Spatial planning; Stable isotope analysis
Résumé Marine Protected Areas (MPAs) are being established across all marine regions but their validity for the conservation of highly mobile marine vertebrates has been questioned. We tested the hypothesis that French coastal MPAs primarily designed for coastal and benthic biota are also beneficial for the conservation of a pelagic seabird, the Vulnerable yelkouan shearwater (Puffinus yelkouan), an endemic species to the Mediterranean Sea. We used a vast spectrum of electronic devices (GPS, temperature-depth-recorders, satellite transmitters and geolocators) and stable isotopic analyses to study the year-round movements and the trophic status of yelkouan shearwaters from the Hyères archipelago (France). In addition we conducted large-scale ship and aircrafts observation surveys to investigate spatio-temporal density patterns of shearwaters (genus Puffinus) in the western Mediterranean Sea. This extensive investigation permitted the first comprehensive study of the at-sea ecology of yelkouan shearwaters showing strikingly coastal habits, partial migration, unsuspected diving capabilities (max dive depth of 30 m), and a broad diet ranging from zooplankton to small pelagic fish. Importantly, 31% of yelkouan shearwaters GPS positions associated with foraging, 38% of diving positions, and 27% of resting positions were within the three French MPAs during the breeding season. These high scores confirmed by year-round distribution derived from GLS, PTTs, at-sea and aerial observations, validated our hypothesis of the major importance of coastal MPAs for the conservation of yelkouan shearwater. Our case-study is therefore a major contribution to research efforts aiming at linking the spatial ecology of highly mobile marine vertebrates with effective conservation of marine biodiversity.
Adresse
Auteur institutionnel Thèse
Editeur Lieu de Publication Éditeur
Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0006-3207 ISBN Médium
Région Expédition Conférence
Notes The following values have no corresponding Zotero field:<br/>Author Address: CEFE-CNRS, UMR5175, 1919 route de Mende, 34293 Montpellier, France<br/>Author Address: University of Cape Town, FitzPatrick Institute, DST-NRF Centre of Excellence , Rondebosch 7701, South Africa<br/>Author Address: Université de La Rochelle,CNRS,Observatoire PELAGIS, Systèmes d’Observation pour la Conservation des Mammifères et des Oiseaux Marins, UMS 3462, Pôle Analytique, 5 allées de l’Océan, 17000 La Rochelle, France<br/>Author Address: IFREMER, (Institut Français de Recherche pour l’Exploitation de la Mer) UMR 212 EME, Sète, France<br/>Author Address: Aarhus University, Department of Bioscience, Frederiksborgvej 399, 4000 Roskilde, Denmark<br/>PB – Elsevier<br/> Approuvé pas de
Numéro d'Appel LL @ pixluser @ collection 285
Lien permanent pour cet enregistrement
 

 
Auteur Parravicini, V.; Kulbicki, M.; Bellwood, D.R.; Friedlander, A.M.; Arias-Gonzalez, J.E.; Chabanet, P.; Floeter, S.R.; Myers, R.; Vigliola, L.; D'Agata, S.; Mouillot, D.
Titre Global patterns and predictors of tropical reef fish species richness Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Ecography
Volume 36 Numéro 12 Pages 1254-1262
Mots-Clés Biogeography; constraints; coral-reefs; dispersal; diversity; eastern; gradients; marine biodiversity; ocean; pacific; spatial autocorrelation
Résumé In the marine realm, the tropics host an extraordinary diversity of taxa but the drivers underlying the global distribution of marine organisms are still under scrutiny and we still lack an accurate global predictive model. Using a spatial database for 6336 tropical reef fishes, we attempted to predict species richness according to geometric, biogeographical and environmental explanatory variables. In particular, we aimed to evaluate and disentangle the predictive performances of temperature, habitat area, connectivity, mid-domain effect and biogeographical region on reef fish species richness. We used boosted regression trees, a flexible machine-learning technique, to build our predictive model and structural equation modeling to test for potential mediation effects' among predictors. Our model proved to be accurate, explaining 80% of the total deviance in fish richness using a cross-validated procedure. Coral reef area and biogeographical region were the primary predictors of reef fish species richness, followed by coast length, connectivity, mid-domain effect and sea surface temperature, with interactions between the region and other predictors. Important indirect effects of water temperature on reef fish richness, mediated by coral reef area, were also identified. The relationship between environmental predictors and species richness varied markedly among biogeographical regions. Our analysis revealed that a few easily accessible variables can accurately predict reef fish species richness. They also highlight concerns regarding ongoing environmental declines, with region-specific responses to variation in environmental conditions predicting a variable response to anthropogenic impacts.
Adresse
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 0906-7590 ISBN Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 623
Lien permanent pour cet enregistrement
 

 
Auteur Mouillot, D.; De Bortoli, J.; Leprieur, F.; Parravicini, V.; Kulbicki, M.; Bellwood, D.R.
Titre The challenge of delineating biogeographical regions: nestedness matters for Indo-Pacific coral reef fishes Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Journal of Biogeography
Volume 40 Numéro 12 Pages 2228-2237
Mots-Clés -diversity; Archipelago; Coral Triangle; Indo-Australian; Pae; beta-diversity; biodiversity hotspots; conservation; delineation; dissimilarity; dung beetles; endemicity; evolutionary history; global; historical biogeography; nestedness; parsimony analysis; partitioning; patterns; reef fish assemblages; spatial-patterns; turnover
Résumé AimThe delineation of regions is a critical procedure in biogeography, but there is still no consensus about the best approach. Traditionally, a compositional dissimilarity index and a clustering algorithm are used to partition locations into regions. However, the choice of index and algorithm may have a profound impact on the final result, particularly when locations display different levels of species richness and when they are nested within each other. Our objective was to estimate the influence of species nestedness among locations on the delineation of biogeographical regions. LocationAs a case study, we used coral reef fishes (families Chaetodontidae, Pomacentridae and Labridae) from the Indo-Pacific, where a large richness gradient extends, often as a series of nested assemblages, from the species-rich Indo-Australian Archipelago (Coral Triangle) to species-poor peripheral locations. MethodsWe used the turnover and nestedness components of the SOrensen and Jaccard dissimilarity indices to estimate the effect of nestedness on the delineation of biogeographical regions. In addition, we compared the results with those obtained using a parsimony analysis of endemicity (PAE). ResultsLow Mantel correlation values revealed that the PAE method assembled locations in a very different way than methods based on dissimilarity indices for Indo-Pacific coral reef fishes. We also found that nestedness mattered when delineating biogeographical units because, for both the SOrensen and the Jaccard indices, reef fish assemblages were grouped differently depending on whether we used the turnover component of each index or the complete index, including the nestedness component. The turnover component ignored variation in species richness attributable to differences in habitat area between locations, and permitted a delineation based solely on species replacement. Main conclusionsWe demonstrate that the choice of the component used to measure dissimilarity between species assemblages is critical, because it may strongly influence regional delineations, at least for Indo-Pacific coral reef fishes. We conclude that the two components of the dissimilarity indices can reveal complementary insights into the role that history may have played in shaping extant patterns of biodiversity.
Adresse
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 0305-0270 ISBN Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 879
Lien permanent pour cet enregistrement
 

 
Auteur Marr, S.M.; Olden, J.D.; Leprieur, F.; Arismendi, I.; Ćaleta, M.; Morgan, D.L.; Nocita, A.; Šanda, R.; Serhan Tarkan, A.; García-Berthou, E.
Titre A global assessment of freshwater fish introductions in mediterranean-climate regions Type Article scientifique
Année (down) 2013 Publication Revue Abrégée Hydrobiologia
Volume Numéro Pages 1-13
Mots-Clés Conservation biogeography; Functional homogenisation; Introduced species; Non-native species; Taxonomic homogenisation
Résumé
Adresse
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 0018-8158 ISBN Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 403
Lien permanent pour cet enregistrement