The influence of climate variability on demographic rates of avian Afro-palearctic migrants

0533412 - ÚBO 2021 RIV GB eng J - Journal Article
Telenský, Tomáš - Klvaňa, P. - Jelínek, M. - Cepák, J. - Reif, J.
The influence of climate variability on demographic rates of avian Afro-palearctic migrants.
Scientific Reports. Roč. 10, č. 1 (2020), č. článku 17592. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA ČR(CZ) GA20-00648S
Institutional support: RVO:68081766
Keywords : peak food availability * phenological mismatch * wild bird * migratory connectivity * population declines * Ficedula hypoleuca * spring migration * survival * arrival * Africa
OECD category: Ecology
Impact factor: 4.380, year: 2020
Method of publishing: Open access
https://www.nature.com/articles/s41598-020-74658-w.pdf

Climate is an important driver of changes in animal population size, but its effect on the underlying demographic rates remains insufficiently understood. This is particularly true for avian long-distance migrants which are exposed to different climatic factors at different phases of their annual cycle. To fill this knowledge gap, we used data collected by a national-wide bird ringing scheme for eight migratory species wintering in sub-Saharan Africa and investigated the impact of climate variability on their breeding productivity and adult survival. While temperature at the breeding grounds could relate to the breeding productivity either positively (higher food availability in warmer springs) or negatively (food scarcity in warmer springs due to trophic mismatch), water availability at the non-breeding should limit the adult survival and the breeding productivity. Consistent with the prediction of the trophic mismatch hypothesis, we found that warmer springs at the breeding grounds were linked with lower breeding productivity, explaining 29% of temporal variance across all species. Higher water availability at the sub-Saharan non-breeding grounds was related to higher adult survival (18% temporal variance explained) but did not carry-over to breeding productivity. Our results show that climate variability at both breeding and non-breeding grounds shapes different demographic rates of long-distance migrants.
Permanent Link: http://hdl.handle.net/11104/0311801


Research data: Dryad