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Estimating local biodiversity change : a critique of papers claiming no net loss of local diversity [Ecology]

Keywords : anthropocene, biodiversity monitoring, species richness, meta-analysis, extinction, invasion, time series, baselines

par Frédéric Magné - publié le

Global species extinction rates are orders of magnitude above the background rate documented in the fossil record. However, recent data syntheses have found mixed evidence for patterns of net species loss at local spatial scales. For example, two recent data meta-analyses have found that species richness is decreasing in some locations and is increasing in others. When these trends are combined, these papers argued there has been no net change in species richness, and suggested this pattern is globally representative of biodiversity change at local scales. Here we re-analyze results of these data syntheses and outline why this conclusion is unfounded.(...)

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