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Life history tactics shape amphibians’ demographic responses to the North Atlantic Oscillation [Global Change Biology]

Keywords : amphibians, Bombina variegata, climate, fast–slow continuum, life history tactics, North Atlantic Oscillation, Salamandra salamandra, Triturus cristatus

par Frédéric Magné - publié le , mis à jour le

Over the last three decades, climate abnormalities have been reported to be involved in biodiversity decline by affecting population dynamics. A growing number of studies have shown that the North Atlantic Oscillation (NAO) influences the demographic parameters of a wide range of plant and animal taxa in different ways. Life history theory could help to understand these different demographic responses to the NAO. Indeed, theory states that the impact of weather variation on a species’ demographic traits should depend on its position along the fast–slow continuum. In particular, it is expected that NAO would have a higher impact on recruitment than on adult survival in slow species, while the opposite pattern is expected occur in fast species. To test these predictions, we used long-term capture–recapture datasets (more than 15,000 individuals marked from 1965 to 2015) on different surveyed populations of three amphibian species in Western Europe : Triturus cristatus, Bombina variegata, and Salamandra salamandra.(...)

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