The limitations of diversity metrics in directing global marine conservation |
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| Institution: | 1. Université Lille Nord de France, Université Lille 1 Sciences et Technologies, Laboratoire d''Océanologie et de Géosciences, CNRS, UMR 8187, Station Marine de Wimereux, 28 Avenue Foch, 62930 Wimereux, France;2. Université Lille Nord de France, Université du Littoral Côte d''Opale, Laboratoire d''Océanologie et de Géosciences, CNRS, UMR 8187, Maison de la Recherche en Environnement Naturel, 32 Avenue Foch, 62930 Wimereux, France |
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| Abstract: | Biodiversity hotspots have been used extensively in setting conservation priorities for marine ecosystems. A recent Nature publication claims to have uncovered new latitudinal gradients in the evenness of reef communities and new reef hotspots based on functional diversity. Simulation models show that the purported evenness gradient is a mathematical inevitability of differences in species richness and detectability between vastly different marine ecosystems, namely ‘reefs’ in tropical, temperate, and polar regions. Constraints on evenness, along with disparity amongst communities in possible functional traits, cast doubt on the utility of global functional diversity comparisons for management of marine systems. |
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| Keywords: | Evenness Functional diversity Macroecology Marine fish Reef ecosystems Underwater visual census |
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