Cross-continental migratory connectivity and spatiotemporal migratory patterns in the great reed warbler

0458945 - ÚBO 2017 RIV DK eng J - Článek v odborném periodiku
Koleček, Jaroslav - Procházka, Petr - El-Arabany, N. - Tarka, M. - Ilieva, M. - Hahn, S. - Honza, Marcel - de la Puente, J. - Bermejo, A. - Gürsoy, A. - Bensch, S. - Zehtindjiev, P. - Hasselquist, D. - Hansson, B.
Cross-continental migratory connectivity and spatiotemporal migratory patterns in the great reed warbler.
Journal of Avian Biology. Roč. 47, č. 6 (2016), s. 756-767. ISSN 0908-8857. E-ISSN 1600-048X
Grant CEP: GA ČR GA13-06451S
Institucionální podpora: RVO:68081766
Klíčová slova: Light-level geolocators * Acrocephalus arundinaceus * Bird migration * Palearctic passerines * Wintering ground * Migrant birds * Wide tracking * Complete molt * Annual cycle * West Africa
Kód oboru RIV: EG - Zoologie
Impakt faktor: 2.228, rok: 2016

Migratory connectivity describes to which degree different breeding populations have distinct non-breeding sites. Uncovering the level of migratory connectivity is crucial for effective conservation and for understanding of the evolution of migration. Here we investigate migration patterns in the great reed warbler over its Western Palearctic breeding range using geolocators from Spain, Sweden, Czech Republic, Bulgaria and Turkey. We found moderate migratory connectivity: a significant spatial structure in the connections between breeding and sub-Saharan non-breeding grounds, but at the same time a partial overlap between individual populations, particularly along the Gulf of Guinea where the majority of the Spanish, Swedish and Czech populations spent their non-breeding period. The post-breeding migration routes were similar in direction and rather parallel for the five populations. Birds from Turkey showed the most distinctive migratory routes and non-breeding range, with a post-breeding migration to east Africa and, together with birds from Bulgaria, a previously unknown pre-breeding migration over the Arabian Peninsula indicating loop migration. The distances between breeding and non-breeding sites, as well as between first and final non-breeding sites, differed among populations. However, the total speed of migration did not differ significantly between populations; neither during post-breeding migration, nor pre-breeding migration. There was also no significant relationship between the total speed of migration and distance between breeding and non-breeding sites and, surprisingly, the total speed of migration generally did not differ significantly between post-breeding and pre-breeding migration. Future challenges include understanding whether environmental conditions may have influenced the differences in migratory patterns that we observed between populations, and to which extent habitat fluctuations and loss may affect population sizes of migrants.

Trvalý link: http://hdl.handle.net/11104/0259152