Intrinsic Markers Reveal Breeding Origin and Geographically-Structured Migration Timing of Two Songbird Species at a Coastal Stopover Site
| Autor: | Jennifer R. Smetzer, David I. King |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nova scotia
Setophaga striata Provenance red-eyed vireo Ecology biology QH301-705.5 Hydrogen isotope wing length migration biology.organism_classification Latitude Songbird Geography Vireo Feather visual_art visual_art.visual_art_medium Animal Science and Zoology Biology (General) blackpoll isotope geographic locations Ecology Evolution Behavior and Systematics |
| Zdroj: | Animal Migration, Vol 7, Iss 1, Pp 42-51 (2020) |
| ISSN: | 2084-8838 |
| DOI: | 10.1515/ami-2020-0005 |
| Popis: | We used stable hydrogen isotope markers to identify geographic provenance of Blackpoll Warblers (Setophaga striata) and Red-eyed Vireos (Vireo olivaceus) passing through a coastal stopover area in the Gulf of Maine on fall migration, and supplemented δ2 H signatures from feathers with wing length data as an additional proxy for migration origin, since geographic size variation has been documented for this species. We captured migrant blackpolls with putative origins from as close as the Adirondacks, New Brunswick, and northwestern Maine, and potentially as far as Alaska. We captured vireos with putative origins from as close as Maine and Nova Scotia, and potentially as far as British Columbia and Alberta. We found a significant relationship between blackpoll wing length and capture date indicating that birds with longer wings– and thus likely from more western and northern breeding regions – passed through the capture site earlier in the season than more local breeders. In contrast, vireos from more distant breeding latitudes passed through the capture site later in the season. These results demonstrate that mid-coast Maine serves as a catchment area for both Blackpoll Warblers, and Red-eyed Vireos, and provides some evidence that connectivity between breeding areas and stopover sites may be strong for blackpolls; however, additional study linking breeding and stopover sites across the migratory range of both species is necessary to understand more fully how strong connectivity is between breeding and stopover areas for these species. |
| Databáze: | OpenAIRE |
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