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Life history tactics shape amphibians’ demographic responses to the North Atlantic Oscillation
Authors:Hugo Cayuela  Pierre Joly  Benedikt R. Schmidt  Julian Pichenot  Eric Bonnaire  Pauline Priol  Olivier Peyronel  Mathias Laville  Aurélien Besnard
Affiliation:1. UMR 5023 LEHNA, Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés, Villeurbanne, France;2. CNRS, EPHE, UM, SupAgro, IRD, INRA, UMR 5175 CEFE, PSL Research University, Montpellier, France;3. Karch, Neuchatel, Switzerland;4. Institut für Evolutionsbiologie und Umweltwissenschaften, Universit?t Zürich, Zürich, Switzerland;5. CERFE, Centre de Recherche et Formation en Eco‐Ethologie, Boult‐aux‐Bois, France;6. ONF, Office National des Forêts, Agence de Verdun, Verdun, France;7. Scientific Consulting, Ganges, France;8. Syndicat des Gorges de l'Ardèche, Saint‐Remèze, France
Abstract: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. Despite substantial intraspecific variation, our study revealed that these three species differ in their position on a slow–fast gradient of pace of life. Our results also suggest that the differences in life history tactics influence amphibian responses to NAO fluctuations: Adult survival was most affected by the NAO in the species with the fastest pace of life (Tcristatus), whereas recruitment was most impacted in species with a slower pace of life (Bvariegata and Ssalamandra). In the context of climate change, our findings suggest that the capacity of organisms to deal with future changes in NAO values could be closely linked to their position on the fast–slow continuum.
Keywords:amphibians     Bombina variegata     climate  fast–  slow continuum  life history tactics  North Atlantic Oscillation     Salamandra salamandra        Triturus cristatus   
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