TY  - GEN
A1  - Heim, Wieland
A1  - Eccard, Jana
A1  - Bairlein, Franz
T1  - Migration phenology determines niche use of East Asian buntings (Emberizidae) during stopover
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Stopover niche utilization of birds during migration has not gained much attention so far, since the majority of the studies focuses on breeding or wintering areas. However, stopover sites are crucial for migratory birds. They are often used by a multitude of species, which could lead to increased competition. In this work, we investigated niche use of 8 migratory and closely related Emberiza bunting species at a stopover site in Far East Russia, situated on the poorly studied East Asian flyway. We used bird ringing data to evaluate morphological similarity as well as niche overlap on the trophic, spatial, and temporal dimension. Bill morphology was used as a proxy for their trophic niche. We were able to prove that a majority of the species occupies well-defined stopover niches on at least one of the dimensions. Niche breadth and niche overlap differ between spring and autumn season with higher overlap found during spring. Morphological differences are mostly related to overall size and wing pointedness. The temporal dimension is most important for segregation among the studied species. Furthermore, all species seem to exhibit a rather strict and consistent phenological pattern. Their occurrence at the study site is highly correlated with their geographic origin and the length of their migration route. We assume that buntings are able to use available resources opportunistically during stopover, while trying to follow a precise schedule in order to avoid competition and to ensure individual fitness.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1038 
KW  - bird migration
KW  - Emberiza
KW  - habitat use
KW  - non-breeding
KW  - phenology
KW  - stopover
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-470607
SN  - 1866-8372
IS  - 1038
SP  - 681
EP  - 692
ER  - 
TY  - JOUR
A1  - Heim, Wieland
A1  - Eccard, Jana
A1  - Bairlein, Franz
T1  - Migration phenology determines niche use of East Asian buntings (Emberizidae) during stopover
JF  - Current zoology
N2  - Stopover niche utilization of birds during migration has not gained much attention so far, since the majority of the studies focuses on breeding or wintering areas. However, stopover sites are crucial for migratory birds. They are often used by a multitude of species, which could lead to increased competition. In this work, we investigated niche use of 8 migratory and closely related Emberiza bunting species at a stopover site in Far East Russia, situated on the poorly studied East Asian fly-way. We used bird ringing data to evaluate morphological similarity as well as niche overlap on the trophic, spatial, and temporal dimension. Bill morphology was used as a proxy for their trophic niche. We were able to prove that a majority of the species occupies well-defined stopover niches on at least one of the dimensions. Niche breadth and niche overlap differ between spring and autumn season with higher overlap found during spring. Morphological differences are mostly related to overall size and wing pointedness. The temporal dimension is most important for segregation among the studied species. Furthermore, all species seem to exhibit a rather strict and consistent phenological pattern. Their occurrence at the study site is highly correlated with their geographic origin and the length of their migration route. We assume that buntings are able to use available resources opportunistically during stopover, while trying to follow a precise schedule in order to avoid competition and to ensure individual fitness.
KW  - bird migration
KW  - Emberiza
KW  - habitat use
KW  - non-breeding
KW  - phenology
KW  - stopover
Y1  - 2018
U6  - https://doi.org/10.1093/cz/zoy016
SN  - 1674-5507
SN  - 2396-9814
VL  - 64
IS  - 6
SP  - 681
EP  - 692
PB  - Oxford Univ. Press
CY  - Oxford
ER  -