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Auteur Jeanmougin, M.; Leprieur, F.; Lois, G.; Clergeau, P. url  doi
openurl 
  Titre Fine-scale urbanization affects Odonata species diversity in ponds of a megacity (Paris, France) Type Article scientifique
  Année 2014 Publication Revue Abrégée Acta Oecologica-International Journal of Ecology  
  Volume 59 Numéro (up) Pages 26-34  
  Mots-Clés Evenness; Landscape composition; Model averaging; Ponds; Species diversity; Urban ecology; agricultural landscape; comparative biodiversity; conservation; dragonflies odonata; ecology; fresh-water habitat; patterns; richness; selection; urban  
  Résumé Current developments in urban ecology include very few studies focused on pond ecosystems, though ponds are recognized as biodiversity hotspots. Using Odonata as an indicator model, we explored changes in species composition in ponds localized along an urban gradient of a megacity (Paris, France). We then assessed the relative importance of local- and landscape-scale variables in shaping Odonata alpha-diversity patterns using a model-averaging approach. Analyses were performed for adult (A) and adult plus exuviae (AE) census data. At 26 ponds, we recorded 657 adults and 815 exuviae belonging to 17 Odonata species. The results showed that the Odonata species assemblage composition was not determined by pond localization along the urban gradient. Similarly, pond characteristics were found to be similar among urban, suburban and periurban ponds. The analyses of AE census data revealed that fine-scale urbanization (i.e., increased density of buildings surrounding ponds) negatively affects Odonata alpha-diversity. In contrast, pond localization along the urban gradient weakly explained the alpha-diversity patterns. Several local-scale variables, such as the coverage of submerged macrophytes, were found to be significant drivers of Odonata alpha-diversity. Together, these results show that the degree of urbanization around ponds must be considered instead of pond localization along the urban gradient when assessing the potential impacts of urbanization on Odonata species diversity This work also indicates the importance of exuviae sampling in understanding the response of Odonata to urbanization. (C) 2014 Elsevier Masson SAS. All rights reserved.  
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  Langue English Langue du Résumé Titre Original  
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  ISSN 1146-609x ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 602  
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Auteur Bourjea, J.; Clermont, S.; Delgado, A.; Murua, H.; Ruiz, J.; Ciccione, S.; Chavance, P. url  doi
openurl 
  Titre Marine turtle interaction with purse-seine fishery in the Atlantic and Indian oceans: Lessons for management Type Article scientifique
  Année 2014 Publication Revue Abrégée Biological Conservation  
  Volume 178 Numéro (up) Pages 74-87  
  Mots-Clés Atlantic Ocean; Bycatch; Fishery impacts; fishery management; Indian Ocean; Marine turtle  
  Résumé Bycatch of endangered marine turtles is a growing issue for the management of all fisheries, including the oceanic purse-seine fishery. The aim of this study was to assess the spatial and temporal variation in bycatch rates of these species in the entire European purse-seine fishery operating in the Atlantic and Indian oceans. The study was based on data collected through observer programs from 1995 to 2011. During that period, a total of 15 913 fishing sets were observed, including 6 515 on Drifting Fish Aggregating Devices (DFADs) and 9 398 on free swimming schools, representing a global coverage of 10.3% and 5.1% of the total fishing activity in the Atlantic and Indian Ocean, respectively. Moreover, from 2003 to 2011, 14 124 specific observations were carried out on DFADs to check turtle entanglement in the net covering DFADs. We found that the purse-seine fishery has a very low impact on marine turtles. We estimated that the annual number of individuals incidentally captured was 218 (SD = 150) and 250 (SD = 157) in the Atlantic and Indian Ocean, respectively, with more than 75% being released alive. The present study also investigated the impact of DFADs; which is considered a key conservation issue for this fishery. Drifting objects may play a key role in aggregating juveniles of marine turtles, implying the need for improving their construction to avoid entanglement (e.g. avoiding nets in the structure); however, based on our study it is not the main source of incidental captures of marine turtles in this fishery.  
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  ISSN 0006-3207 ISBN Médium  
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  Numéro d'Appel LL @ pixluser @ collection 349  
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Auteur van den Hout, P.J.; van Gils, J.A.; Robin, F.; van der Geest, M.; Dekinga, A.; Piersma, T. openurl 
  Titre Interference from adults forces young red knots to forage for longer and in dangerous places Type Article scientifique
  Année 2014 Publication Revue Abrégée Animal Behaviour  
  Volume 88 Numéro (up) Pages 137-146  
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  Numéro d'Appel MARBEC @ alain.herve @ 1072 collection 1374  
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Auteur Benazzouz, A.; Mordane, S.; Orbi, A.; Chagdali, M.; Hilmi, K.; Atillah, A.; Pelegri, J.L.; Demarcq, H. url  doi
openurl 
  Titre An improved coastal upwelling index from sea surface temperature using satellite-based approach : the case of the Canary Current upwelling system Type Article scientifique
  Année 2014 Publication Revue Abrégée Continental Shelf Research  
  Volume 81 Numéro (up) Pages 38-54  
  Mots-Clés Canary upwelling system; Coastal upwelling; Coastal upwelling index; Remote sensing; Sea surface temperature; West Africa  
  Résumé A new methodology to derive an SST-based upwelling index was based on a rigorous spatial analysis of satellite SST fields and their variability, by referring to previous works, from Wooster et al. (1976) to Santos et al. (2011). The data was precautiously processed by considering data quality aspects (including cloud cover) and the best way to derive accurate coastal SST and its offshore reference. The relevance of the developed index was evaluated by comparing its spatial and seasonal consistency against two wind-based indices as well as with the previous SST-based indices, largely superseding these later ones in term of overall quality and spatio-temporal dynamic. Our index adequately describes the spatio-temporal variability of the coastal upwelling intensity in the Canary Current upwelling system and has the advantage of describing complementary aspects of the coastal dynamics of the region that were not covered by Ekman-based indices. The proposed methodology is generic and can be easily applicable to various coastal upwelling systems, especially the four major eastern boundary upwelling ecosystems.  
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  ISSN 0278-4343 ISBN Médium  
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  Numéro d'Appel LL @ pixluser @ collection 351  
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Auteur van der Geest, M.; Sall, A.A.; Ely, S.O.; Nauta, R.W.; van Gils, J.A.; Piersma, T. doi  openurl
  Titre Nutritional and reproductive strategies in a chemsoymbiotic bivalve living in a tropical intertidal seagrass bed Type Article scientifique
  Année 2014 Publication Revue Abrégée Marine Ecology Progress Series  
  Volume 501 Numéro (up) Pages 113-126  
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  Numéro d'Appel MARBEC @ alain.herve @ 848 collection 1378  
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