[article]
| Titre : |
Birds are tracking climate warming, but not fast enough |
| Type de document : |
Électronique |
| Auteurs : |
Vincent Devictor (1978-) ; Romain Julliard ; Denis Couvet (1960-) ; Frédéric Jiguet (1972-) |
| Année de publication : |
2008 |
| Article en page(s) : |
2743–2748 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Thématique] Plantes subspontanées, naturalisées, envahissantes
[Thématique] Relations climat-végétation
|
| Résumé : |
Range shifts of many species are now documented as a response to global warming. But whether these observed changes are occurring fast enough remains uncertain and hardly quantifiable. Here, we developed a simple framework to measure change in community composition in response to climate warming. This framework is based on a community temperature index (CTI) that directly reflects, for a given species assemblage, the balance between low- and high-temperature dwelling species. Using data from the French breeding bird survey, we first found a strong increase in CTI over the last two decades revealing that birds are rapidly tracking climate warming. This increase corresponds to a 91 km northward shift in bird community composition, which is much higher than previous estimates based on changes in species range edges. During the same period, temperature increase corresponds to a 273 km northward shift in temperature. Change in community composition was thus insufficient to keep up with temperature increase: birds are lagging approximately 182 km behind climate warming. Our method is applicable to any taxa with large-scale survey data, using either abundance or occurrence data. This approach can be further used to test whether different delays are found across groups or in different land-use contexts. |
| Lien pérenne : |
DOI : 10.1098/rspb.2008.0878  |
in Proceedings of the Royal Society. Biological Sciences > 275 (2008) . - 2743–2748
Devictor, V., Julliard, R., Couvet, D., Jiguet, F.
2008.
Birds are tracking climate warming, but not fast enough.
Proceedings of the Royal Society. Biological Sciences, 275: 2743–2748.
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