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Migratory diversity predicts population declines in birds [Ecology Letters]

Keywords : afrotropical migrants, behavioural plasticity, climate change ; European birds, migratory strategy, partial migration, population trends

par Frédéric Magné - publié le

Declines in migratory species are a pressing concern worldwide, but the mechanisms underpinning these declines are not fully understood. We hypothesised that species with greater within-population variability in migratory movements and destinations, here termed ‘migratory diversity’, might be more resilient to environmental change. To test this, we related map-based metrics of migratory diversity to recent population trends for 340 European breeding birds.(...)

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