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Demographic drivers of decline and recovery in an Afro-Palaearctic migratory bird population [Royal Society Open Science]

Keywords : population dynamics, integrated population models, carry-over effects, migration, demography

par Frédéric Magné - publié le

Across Europe, rapid population declines are ongoing in many Afro-Palaearctic migratory bird species, but the development of appropriate conservation actions across such large migratory ranges is severely constrained by lack of understanding of the demographic drivers of these declines. By constructing regional integrated population models (IPMs) for one of the suite of migratory species that is declining in the southeast of Britain but increasing in the northwest, we show that, while annual population growth rates in both regions vary with adult survival, the divergent regional trajectories are primarily a consequence of differences in productivity. (...)

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