Are long-distance migrants limited by climate on breeding or wintering grounds?

0454993 - ÚBO 2016 ES eng A - Abstract
Telenský, Tomáš - Klvaňa, P. - Cepák, J. - Jelínek, M. - Reif, J.
Are long-distance migrants limited by climate on breeding or wintering grounds?
10th conference of the European Ornithologist's Union, 24-28 August 2015, Badajoz: programme and abstracts. Badajoz: European Ornithologist's Union, 2015 - (Martin, G.; Marzal, A.). s. 129
[Conference of the European Ornithologist's Union /10./. 24.08.2015-28.08.2015, Badajoz]
R&D Projects: GA ČR GA13-06451S
Institutional support: RVO:68081766
Keywords : bird migration
Subject RIV: EG - Zoology

Currently there are two most discussed hypotheses explaining impact of climate on bird populations. First, conditions in wintering sites in sub-Saharan Africa, particularly droughts, negatively affect survival of long-distance migrants. Second, increasing spring temperatures negatively affect breeding productivity of long-distance migrants due to mismatch of the peak of seasonal food supply with the arrival of long-distance migrants to the breeding grounds (mismatch hypothesis). Both of these hypotheses have been proven by many studies, however, a complex, multiple-species study comparing the strength of both of these effects is still lacking. Here we correlate survival and productivity from Constant Effort Sites data in Czech Republic with spring temperature on breeding grounds and precipitation and moisture on wintering grounds. This way we are able to compare the strength of both hypotheses across wide species spectrum. Our study will hopefully increase our understanding of the mechanisms how climate change affects bird populations.
Permanent Link: http://hdl.handle.net/11104/0255758