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Auteur Tisseuil, C.; Leprieur, F.; Grenouillet, G.; Vrac, M.; Lek, S.
Titre Projected impacts of climate change on spatio-temporal patterns of freshwater fish beta diversity: a deconstructing approach Type Article scientifique
Année 2012 Publication Revue Abrégée Global Ecology and Biogeography
Volume 21 Numéro 12 Pages 1213-1222
Mots-Clés Beta diversity; France; ensemble forecasting; freshwater fish; nestedness; species distribution model; temporal changes; turnover
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ISSN 1466-8238 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 799
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Auteur Miloslavich, P.; Bax, N.J.; Simmons, S.E.; Klein, E.; Appeltans, W.; Aburto‐Oropeza, O.; Garcia, M.A.; Batten, S.D.; Benedetti‐Cecchi, L.; Checkley, D.M.; Chiba, S.; Duffy, J.E.; Dunn, D.C.; Fischer, A.; Gunn, J.; Kudela, R.; Marsac, F.; Muller‐Karger, F.E.; Obura, D.; Shin, Y.-J.
Titre Essential ocean variables for global sustained observations of biodiversity and ecosystem changes Type Article scientifique
Année 2018 Publication Revue Abrégée Global Change Biology
Volume 24 Numéro 6 Pages 2416-2433
Mots-Clés driver-pressure-state-impact-response; essential ocean variables; framework for ocean observing; global ocean observing system; marine biodiversity changes; Marine Biodiversity Observation Network; ocean change
Résumé Sustained observations of marine biodiversity and ecosystems focused on specific conservation and management problems are needed around the world to effectively mitigate or manage changes resulting from anthropogenic pressures. These observations, while complex and expensive, are required by the international scientific, governance and policy communities to provide baselines against which the effects of human pressures and climate change may be measured and reported, and resources allocated to implement solutions. To identify biological and ecological essential ocean variables (EOVs) for implementation within a global ocean observing system that is relevant for science, informs society, and technologically feasible, we used a driver-pressure-state-impact-response (DPSIR) model. We (1) examined relevant international agreements to identify societal drivers and pressures on marine resources and ecosystems, (2) evaluated the temporal and spatial scales of variables measured by 100+ observing programs, and (3) analysed the impact and scalability of these variables and how they contribute to address societal and scientific issues. EOVs were related to the status of ecosystem components (phytoplankton and zooplankton biomass and diversity, and abundance and distribution of fish, marine turtles, birds and mammals), and to the extent and health of ecosystems (cover and composition of hard coral, seagrass, mangrove and macroalgal canopy). Benthic invertebrate abundance and distribution and microbe diversity and biomass were identified as emerging EOVs to be developed based on emerging requirements and new technologies. The temporal scale at which any shifts in biological systems will be detected will vary across the EOVs, the properties being monitored and the length of the existing time-series. Global implementation to deliver useful products will require collaboration of the scientific and policy sectors and a significant commitment to improve human and infrastructure capacity across the globe, including the development of new, more automated observing technologies, and encouraging the application of international standards and best practices.
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ISSN 1365-2486 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2336
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Auteur Pellissier, L.; Leprieur, F.; Parravicini, V.; Cowman, P.F.; Kulbicki, M.; Litsios, G.; Olsen, S.M.; Wisz, M.S.; Bellwood, D.R.; Mouillot, D.
Titre Quaternary coral reef refugia preserved fish diversity Type Article scientifique
Année 2014 Publication Revue Abrégée Science
Volume 344 Numéro 6187 Pages 1016-1019
Mots-Clés abundance; areas; assembly rules; cradles; global patterns; gradient; hotspots; marine biodiversity; museums; species richness
Résumé The most prominent pattern in global marine biogeography is the biodiversity peak in the Indo-Australian Archipelago. Yet the processes that underpin this pattern are still actively debated. By reconstructing global marine paleoenvironments over the past 3 million years on the basis of sediment cores, we assessed the extent to which Quaternary climate fluctuations can explain global variation in current reef fish richness. Comparing global historical coral reef habitat availability with the present-day distribution of 6316 reef fish species, we find that distance from stable coral reef habitats during historical periods of habitat loss explains 62% of the variation in fish richness, outweighing present-day environmental factors. Our results highlight the importance of habitat persistence during periods of climate change for preserving marine biodiversity.
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ISSN 0036-8075 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 801
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Auteur Milner-Gulland, E.J.; Garcia, S.; Arlidge, W.; Bull, J.; Charles, A.; Dagorn, L.; Fordham, S.; Zivin, J.G.; Hall, M.; Shrader, J.; Vestergaard, N.; Wilcox, C.; Squires, D.
Titre Translating the terrestrial mitigation hierarchy to marine megafauna by-catch Type Article scientifique
Année 2018 Publication Revue Abrégée Fish. Fish.
Volume 19 Numéro 3 Pages 547-561
Mots-Clés albatrosses; artisanal fisheries; biodiversity offsets; biodiversity offsetting; circle hooks; conservation; economic incentives; fisheries bycatch; fishing effort; harbor porpoise; leatherback turtle; no net loss; seabird bycatch; sharks and rays; turtles
Résumé In terrestrial and coastal systems, the mitigation hierarchy is widely and increasingly used to guide actions to ensure that no net loss of biodiversity ensues from development. We develop a conceptual model which applies this approach to the mitigation of marine megafauna by-catch in fisheries, going from defining an overarching goal with an associated quantitative target, through avoidance, minimization, remediation to offsetting. We demonstrate the framework's utility as a tool for structuring thinking and exposing uncertainties. We draw comparisons between debates ongoing in terrestrial situations and in by-catch mitigation, to show how insights from each could inform the other; these are the hierarchical nature of mitigation, out-of-kind offsets, research as an offset, incentivizing implementation of mitigation measures, societal limits and uncertainty. We explore how economic incentives could be used throughout the hierarchy to improve the achievement of by-catch goals. We conclude by highlighting the importance of clear agreed goals, of thinking beyond single species and individual jurisdictions to account for complex interactions and policy leakage, of taking uncertainty explicitly into account and of thinking creatively about approaches to by-catch mitigation in order to improve outcomes for conservation and fishers. We suggest that the framework set out here could be helpful in supporting efforts to improve by-catch mitigation efforts and highlight the need for a full empirical application to substantiate this.
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ISSN 1467-2960 ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 2337
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Auteur Galiana, N.; Lurgi, M.; Claramunt-Lopez, B.; Fortin, M.-J.; Leroux, S.; Cazelles, K.; Gravel, D.; Montoya, J.M.
Titre The spatial scaling of species interaction networks Type Article scientifique
Année 2018 Publication Revue Abrégée Nat. Ecol. Evol.
Volume 2 Numéro 5 Pages 782-790
Mots-Clés area relationships; biodiversity; competition; diversity; ecological networks; extinction; food-web structure; habitat loss; source-sink metacommunities; trophic interactions
Résumé Species-area relationships (SARs) are pivotal to understand the distribution of biodiversity across spatial scales. We know little, however, about how the network of biotic interactions in which biodiversity is embedded changes with spatial extent. Here we develop a new theoretical framework that enables us to explore how different assembly mechanisms and theoretical models affect multiple properties of ecological networks across space. We present a number of testable predictions on network-area relationships (NARs) for multi-trophic communities. Network structure changes as area increases because of the existence of different SARs across trophic levels, the preferential selection of generalist species at small spatial extents and the effect of dispersal limitation promoting beta-diversity. Developing an understanding of NARs will complement the growing body of knowledge on SARs with potential applications in conservation ecology. Specifically, combined with further empirical evidence, NARs can generate predictions of potential effects on ecological communities of habitat loss and fragmentation in a changing world.
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Langue English Langue du Résumé Titre Original
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ISSN 2397-334x ISBN Médium
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Numéro d'Appel MARBEC @ alain.herve @ collection 2339
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