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Auteur Evans, S.M.; McKenna, C.; Simpson, S.D.; Tournois, J.; Genner, M.J. doi  openurl
  Titre Patterns of species range evolution in Indo-Pacific reef assemblages reveal the Coral Triangle as a net source of transoceanic diversity Type Article scientifique
  Année 2016 Publication Revue Abrégée Biol. Lett.  
  Volume 12 Numéro 6 Pages (down) 20160090  
  Mots-Clés Bayesian skyline plot; biogeography; climate change; coral reef; fishes global patterns; marine biodiversity; ocean; phylogeography; refugia; species distributions  
  Résumé The Coral Triangle in the Indo-Pacific is a region renowned for exceptional marine biodiversity. The area could have acted as a 'centre of origin' where speciation has been prolific or a 'centre of survival' by providing refuge during major environmental shifts such as sea-level changes. The region could also have acted as a 'centre of accumulation' for species with origins outside of the Coral Triangle, owing to it being at a central position between the Indian and Pacific oceans. Here, we investigated support for these hypotheses using population-level DNA sequence-based reconstructions of the range evolution of 45 species (314 populations) of Indo-Pacific reef-associated organisms. Our results show that populations undergoing the most ancient establishment were significantly more likely to be closer to the centre of the Coral Triangle than to peripheral locations. The data are consistent with the Coral Triangle being a net source of coral-reef biodiversity for the Indo-Pacific region, suggesting that the region has acted primarily as a centre of survival, a centre of origin or both. These results provide evidence of how a key location can influence the large-scale distributions of biodiversity over evolutionary timescales.  
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  Langue English Langue du Résumé Titre Original  
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  Volume de collection Numéro de collection Edition  
  ISSN 1744-9561 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 1694  
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Auteur Seddon, N.; Mace, G.M.; Naeem, S.; Tobias, J.A.; Pigot, A.L.; Cavanagh, R.; Mouillot, D.; Vause, J.; Walpole, M. doi  openurl
  Titre Biodiversity in the Anthropocene: prospects and policy Type Article scientifique
  Année 2016 Publication Revue Abrégée Proc. R. Soc. B-Biol. Sci.  
  Volume 283 Numéro 1844 Pages (down) 20162094  
  Mots-Clés environment; productivity; functional diversity; ecosystem; conservation; land-use; species richness; extinction; ecosystem services; plant diversity; values; biodiversity services; ecological resilience; interdisciplinary; sustainable development  
  Résumé Meeting the ever-increasing needs of the Earth's human population without excessively reducing biological diversity is one of the greatest challenges facing humanity, suggesting that newapproaches to biodiversity conservation are required. One idea rapidly gaining momentum-as well as opposition-is to incorporate the values of biodiversity into decision-making using economic methods. Here, we develop several lines of argument for how biodiversity might be valued, building on recent developments in natural science, economics and science-policy processes. Then we provide a synoptic guide to the papers in this special feature, summarizing recent research advances relevant to biodiversity valuation and management. Current evidence suggests that more biodiverse systems have greater stability and resilience, and that by maximizing key components of biodiversity we maximize an ecosystem's long-term value. Moreover, many services and values arising from biodiversity are interdependent, and often poorly captured by standard economic models. We conclude that economic valuation approaches to biodiversity conservation should (i) account for interdependency and (ii) complement rather than replace traditional approaches. To identify possible solutions, we present a framework for understanding the foundational role of hard-to-quantify ` biodiversity services' in sustaining the value of ecosystems to humanity, and then use this framework to highlight new directions for pure and applied research. In most cases, clarifying the links between biodiversity and ecosystem services, and developing effective policy and practice for managing biodiversity, will require a genuinely interdisciplinary approach.  
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  Volume de collection Numéro de collection Edition  
  ISSN 0962-8452 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 2248  
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Auteur Montano, S.; Fattorini, S.; Parravicini, V.; Berumen, M.L.; Galli, P.; Maggioni, D.; Arrigoni, R.; Seveso, D.; Strona, G. doi  openurl
  Titre Corals hosting symbiotic hydrozoans are less susceptible to predation and disease Type Article scientifique
  Année 2017 Publication Revue Abrégée Proc. R. Soc. B-Biol. Sci.  
  Volume 284 Numéro 1869 Pages (down) 20172405  
  Mots-Clés diversity; climate change; climate-change; great-barrier-reef; coral reefs; association; scleractinian corals; cnidaria; 1st record; acanthaster; bleaching; co-evolution; drupella; Drupella; zanclea  
  Résumé In spite of growing evidence that climate change may dramatically affect networks of interacting species, whether- and to what extent-ecological interactions can mediate species' responses to disturbances is an open question. Here we show how a largely overseen association such as that between hydrozoans and scleractinian corals could be possibly associated with a reduction in coral susceptibility to ever-increasing predator and disease outbreaks. We examined 2455 scleractinian colonies (from both Maldivian and the Saudi Arabian coral reefs) searching for non-random patterns in the occurrence of hydrozoans on corals showing signs of different health conditions (i.e. bleaching, algal overgrowth, corallivory and different coral diseases). We show that, after accounting for geographical, ecological and co-evolutionary factors, signs of disease and corallivory are significantly lower in coral colonies hosting hydrozoans than in hydrozoan-free ones. This finding has important implications for our understanding of the ecology of coral reefs, and for their conservation in the current scenario of global change, because it suggests that symbiotic hydrozoans may play an active role in protecting their scleractinian hosts from stresses induced by warming water temperatures.  
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  ISSN 0962-8452 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 2258  
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Auteur Letessier, T.B.; Mouillot, D.; Bouchet, P.J.; Vigliola, L.; Fernandes, M.C.; Thompson, C.; Boussarie, G.; Turner, J.; Juhel, J.-B.; Maire, E.; Caley, M.J.; Koldewey, H.J.; Friedlander, A.; Sala, E.; Meeuwig, J.J. doi  openurl
  Titre Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific Type Article scientifique
  Année 2019 Publication Revue Abrégée PLoS. Biol.  
  Volume 17 Numéro 8 Pages (down) e3000366  
  Mots-Clés biodiversity; coastal; consequences; hotspots; mortality; ocean; patterns; protected areas; shark sanctuary; tracking  
  Résumé Since the 1950s, industrial fisheries have expanded globally, as fishing vessels are required to travel further afield for fishing opportunities. Technological advancements and fishery subsidies have granted ever-increasing access to populations of sharks, tunas, billfishes, and other predators. Wilderness refuges, defined here as areas beyond the detectable range of human influence, are therefore increasingly rare. In order to achieve marine resources sustainability, large no-take marine protected areas (MPAs) with pelagic components are being implemented. However, such conservation efforts require knowledge of the critical habitats for predators, both across shallow reefs and the deeper ocean. Here, we fill this gap in knowledge across the Indo-Pacific by using 1,041 midwater baited videos to survey sharks and other pelagic predators such as rainbow runner (Elagatis bipinnulata), mahimahi (Coryphaena hippurus), and black marlin (Istiompax indica). We modeled three key predator community attributes: vertebrate species richness, mean maximum body size, and shark abundance as a function of geomorphology, environmental conditions, and human pressures. All attributes were primarily driven by geomorphology (35%-62% variance explained) and environmental conditions (14%-49%). While human pressures had no influence on species richness, both body size and shark abundance responded strongly to distance to human markets (12%-20%). Refuges were identified at more than 1,250 km from human markets for body size and for shark abundance. These refuges were identified as remote and shallow seabed features, such as seamounts, submerged banks, and reefs. Worryingly, hotpots of large individuals and of shark abundance are presently under-represented within no-take MPAs that aim to effectively protect marine predators, such as the British Indian Ocean Territory. Population recovery of predators is unlikely to occur without strategic placement and effective enforcement of large no-take MPAs in both coastal and remote locations.  
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  Volume de collection Numéro de collection Edition  
  ISSN 1544-9173 ISBN Médium  
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  Notes WOS:000483408500011 Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2638  
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Auteur Jousset, A.; Eisenhauer, N.; Merker, M.; Mouquet, N.; Scheu, S. doi  openurl
  Titre High functional diversity stimulates diversification in experimental microbial communities Type Article scientifique
  Année 2016 Publication Revue Abrégée Sci. Adv.  
  Volume 2 Numéro 6 Pages (down) e1600124  
  Mots-Clés adaptive radiation; biodiversity; competition; evolution; phase variation; pseudomonas-fluorescens; recombination; root colonization; selection; soil  
  Résumé There is a growing awareness that biodiversity not only drives ecosystem services but also affects evolutionary dynamics. However, different theories predict contrasting outcomes on when do evolutionary processes occur within a context of competition. We tested whether functional diversity can explain diversification patterns. We tracked the survival and diversification of a focal bacterial species (Pseudomonas fluorescens) growing in bacterial communities of variable diversity and composition. We found that high functional diversity reduced the fitness of the focal species and, at the same time, fostered its diversification. This pattern was linked to resource competition: High diversity increased competition on a portion of the resources while leaving most underexploited. The evolved phenotypes of the focal species showed a better use of underexploited resources, albeit at a cost of lower overall growth rates. As a result, diversification alleviated the impact of competition on the fitness of the focal species. We conclude that biodiversity can stimulate evolutionary diversification, provided that sufficient alternative niches are available.  
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  Volume de collection Numéro de collection Edition  
  ISSN 2375-2548 ISBN Médium  
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  Numéro d'Appel MARBEC @ alain.herve @ collection 1649  
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