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Auteur Gaboriau, T.; Albouy, C.; Descombes, P.; Mouillot, D.; Pellissier, L.; Leprieur, F.
Titre Ecological constraints coupled with deep-time habitat dynamics predict the latitudinal diversity gradient in reef fishes Type Article scientifique
Année 2019 Publication (down) Revue Abrégée Proc. R. Soc. B-Biol. Sci.
Volume 286 Numéro 1911 Pages 20191506
Mots-Clés biodiversity; climate; diversification; environmental-changes; global patterns; latitudinal diversity gradient; mechanistic model; niche conservatism; palaeohabitat; plate-tectonics; rates; reef fish; relative roles; species richness
Résumé We develop a spatially explicit model of diversification based on palaeohabitat to explore the predictions of four major hypotheses potentially explaining the latitudinal diversity gradient (LDG), namely, the 'time-area', 'tropical niche conservatism', 'ecological limits' and 'evolutionary speed' livpotheses. We compare simulation outputs to observed diversity gradients in the global reef fish fauna. Our simulations show that these hypotheses are nonmutually exclusive and that their relative influence depends on the time scale considered. Simulations suggest that reef habitat dynamics produced the LDG during deep geological time, while ecological constraints shaped the modern LDG, with a strong influence of the reduction in the latitudinal extent of tropical reefs during the Neogene. Overall, this study illustrates how mechanistic models in ecology and evolution can provide a temporal and spatial understanding of the role of speciation, extinction and dispersal in generating biodiversity patterns.
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Volume de collection Numéro de collection Edition
ISSN 0962-8452 ISBN Médium
Région Expédition Conférence
Notes WOS:000486417800008 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2650
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Auteur McLean, M.; Auber, A.; Graham, N.A.J.; Houk, P.; Villeger, S.; Violle, C.; Thuiller, W.; Wilson, S.K.; Mouillot, D.
Titre Trait structure and redundancy determine sensitivity to disturbance in marine fish communities Type Article scientifique
Année 2019 Publication (down) Revue Abrégée Glob. Change Biol.
Volume 25 Numéro 10 Pages 3424-3437
Mots-Clés biodiversity; climate change; climate-change; coral reefs; coral-reef fish; diversity stability; ecological traits; ecosystem functioning; ecosystem productivity; egg buoyancy; English Channel; functional diversity; functional redundancy; north-sea; regime shifts; response diversity; vulnerability
Résumé Trait diversity is believed to influence ecosystem dynamics through links between organismal traits and ecosystem processes. Theory predicts that key traits and high trait redundancy-large species richness and abundance supporting the same traits-can buffer communities against environmental disturbances. While experiments and data from simple ecological systems lend support, large-scale evidence from diverse, natural systems under major disturbance is lacking. Here, using long-term data from both temperate (English Channel) and tropical (Seychelles Islands) fishes, we show that sensitivity to disturbance depends on communities' initial trait structure and initial trait redundancy. In both ecosystems, we found that increasing dominance by climatically vulnerable traits (e.g., small, fast-growing pelagics/corallivores) rendered fish communities more sensitive to environmental change, while communities with higher trait redundancy were more resistant. To our knowledge, this is the first study demonstrating the influence of trait structure and redundancy on community sensitivity over large temporal and spatial scales in natural systems. Our results exemplify a consistent link between biological structure and community sensitivity that may be transferable across ecosystems and taxa and could help anticipate future disturbance impacts on biodiversity and ecosystem functioning.
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Langue English Langue du Résumé Titre Original
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Volume de collection Numéro de collection Edition
ISSN 1354-1013 ISBN Médium
Région Expédition Conférence
Notes WOS:000486150200018 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2652
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Auteur McLean, M.; Mouillot, D.; Villeger, S.; Graham, N.A.J.; Auber, A.
Titre Interspecific differences in environmental response blur trait dynamics in classic statistical analyses Type Article scientifique
Année 2019 Publication (down) Revue Abrégée Mar. Biol.
Volume 166 Numéro 12 Pages 152
Mots-Clés climate-change; community composition; ecology; framework; functional diversity; impact; rules
Résumé Trait-based ecology strives to better understand how species, through their bio-ecological traits, respond to environmental changes, and influence ecosystem functioning. Identifying which traits are most responsive to environmental changes can provide insight for understanding community structuring and developing sustainable management practices. However, misinterpretations are possible, because standard statistical methods (e.g., principal component analysis and linear regression) for identifying and ranking the responses of different traits to environmental changes ignore interspecific differences. Here, using both artificial data and real-world examples from marine fish communities, we show how considering species-specific responses can lead to drastically different results than standard community-level methods. By demonstrating the potential impacts of interspecific differences on trait dynamics, we illuminate a major, yet rarely discussed issue, highlighting how analytical misinterpretations can confound our basic understanding of trait responses, which could have important consequences for biodiversity conservation.
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Langue English Langue du Résumé Titre Original
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Volume de collection Numéro de collection Edition
ISSN 0025-3162 ISBN Médium
Région Expédition Conférence
Notes WOS:000496131000001 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2660
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Auteur Aubé, J.; Senin, P.; Pringault, O.; Bonin, P.; Deflandre, B.; Bouchez, O.; Bru, N.; Biritxinaga-Etchart, E.; Klopp, C.; Guyoneaud, R.; Goñi-Urriza, M.
Titre The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats Type Article scientifique
Année 2016 Publication (down) Revue Abrégée Marine Pollution Bulletin
Volume 111 Numéro 1 Pages 115-125
Mots-Clés Biogeochemical functioning; diversity; Hydrocarbonoclastic bacteria; Microbial mats
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ISSN 0025-326x ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2155
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Auteur Durant, J.M.; Molinero, J.-C.; Ottersen, G.; Reygondeau, G.; Stige, L.C.; Langangen, O.
Titre Contrasting effects of rising temperatures on trophic interactions in marine ecosystems Type Article scientifique
Année 2019 Publication (down) Revue Abrégée Sci Rep
Volume 9 Numéro Pages 15213
Mots-Clés biodiversity; calanus-finmarchicus; climate-change; fluctuations; life-history; mallotus-villosus; match; mismatch; phenology; thermal tolerance
Résumé In high-latitude marine environments, primary producers and their consumers show seasonal peaks of abundance in response to annual light cycle, water column stability and nutrient availability. Predatory species have adapted to this pattern by synchronising life-history events such as reproduction with prey availability. However, changing temperatures may pose unprecedented challenges by decoupling the predator-prey interactions. Here we build a predator-prey model accounting for the full life-cycle of fish and zooplankton including their phenology. The model assumes that fish production is bottom-up controlled by zooplankton prey abundance and match or mismatch between predator and prey phenology, and is parameterised based on empirical findings of how climate influences phenology and prey abundance. With this model, we project possible climate-warming effects on match-mismatch dynamics in Arcto-boreal and temperate biomes. We find a strong dependence on synchrony with zooplankton prey in the Arcto-boreal fish population, pointing towards a possible pronounced population decline with warming because of frequent desynchronization with its zooplankton prey. In contrast, the temperate fish population appears better able to track changes in prey timing and hence avoid strong population decline. These results underline that climate change may enhance the risks of predator-prey seasonal asynchrony and fish population declines at higher latitudes.
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ISSN 2045-2322 ISBN Médium
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Notes WOS:000491859500003 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2668
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