Large-scale geographical variation confirms that climate change causes birds to lay earlier



: Both C, Artemyev AV, Blaauw B, Cowie RJ, Dekhuijzen AJ, Eeva T, Enemar A, Gustafsson L, Ivankina EV, Järvinen A, Metcalfe NB, Nyholm NEI, Potti J, Ravussin PA, Sanz JJ, Silverin B, Slater FM, Sokolov LV, Torok J, Winkel W, Wright J, Zang H, Visser ME

Publisher: ROYAL SOC

: 2004

: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

: P ROY SOC B-BIOL SCI

: 271

: 1549

: 1657

: 1662

: 6

: 0962-8452

DOI: https://doi.org/10.1098/rspb.2004.2770


Advances in the phenology of organisms are often attributed to climate change, but alternatively, may reflect a publication bias towards advances and may be caused by environmental factors unrelated to climate change. Both factors are investigated using the breeding dates of 25 long-term studied populations of Ficedula flycatchers across Europe. Trends in spring temperature varied markedly between study sites, and across populations the advancement of laying date was stronger in areas where the spring temperatures increased more, giving support to the theory that climate change causally affects breeding date advancement.



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