Winter locations of red‐throated divers from geolocation and feather isotope signatures
Abstract Migratory species have geographically separate distributions during their annual cycle, and these areas can vary between populations and individuals. This can lead to differential stress levels being experienced across a species range. Gathering information on the areas used during the annu...
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ftdoajarticles:oai:doaj.org/article:d96e5fcc86624c0fb931c3d75594bec2 2023-05-15T16:49:11+02:00 Winter locations of red‐throated divers from geolocation and feather isotope signatures James Duckworth Susan O'Brien Ib K. Petersen Aevar Petersen Guðmundur Benediktsson Logan Johnson Petteri Lehikoinen David Okill Roni Väisänen Jim Williams Stuart Williams Francis Daunt Jonathan A. Green 2022-08-01T00:00:00Z https://doi.org/10.1002/ece3.9209 https://doaj.org/article/d96e5fcc86624c0fb931c3d75594bec2 EN eng Wiley https://doi.org/10.1002/ece3.9209 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.9209 https://doaj.org/article/d96e5fcc86624c0fb931c3d75594bec2 Ecology and Evolution, Vol 12, Iss 8, Pp n/a-n/a (2022) Gavia GLS isotope loon movement Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.1002/ece3.9209 2022-12-30T22:47:17Z Abstract Migratory species have geographically separate distributions during their annual cycle, and these areas can vary between populations and individuals. This can lead to differential stress levels being experienced across a species range. Gathering information on the areas used during the annual cycle of red‐throated divers (RTDs; Gavia stellata) has become an increasingly pressing issue, as they are a species of concern when considering the effects of disturbance from offshore wind farms and the associated ship traffic. Here, we use light‐based geolocator tags, deployed during the summer breeding season, to determine the non‐breeding winter location of RTDs from breeding locations in Scotland, Finland, and Iceland. We also use δ15N and δ13C isotope signatures, from feather samples, to link population‐level differences in areas used in the molt period to population‐level differences in isotope signatures. We found from geolocator data that RTDs from the three different breeding locations did not overlap in their winter distributions. Differences in isotope signatures suggested this spatial separation was also evident in the molting period, when geolocation data were unavailable. We also found that of the three populations, RTDs breeding in Iceland moved the shortest distance from their breeding grounds to their wintering grounds. In contrast, RTDs breeding in Finland moved the furthest, with a westward migration from the Baltic into the southern North Sea. Overall, these results suggest that RTDs breeding in Finland are likely to encounter anthropogenic activity during the winter period, where they currently overlap with areas of future planned developments. Icelandic and Scottish birds are less likely to be affected, due to less ship activity and few or no offshore wind farms in their wintering distributions. We also demonstrate that separating the three populations isotopically is possible and suggest further work to allocate breeding individuals to wintering areas based solely on feather samples. Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Ecology and Evolution 12 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Gavia GLS isotope loon movement Ecology QH540-549.5 |
spellingShingle |
Gavia GLS isotope loon movement Ecology QH540-549.5 James Duckworth Susan O'Brien Ib K. Petersen Aevar Petersen Guðmundur Benediktsson Logan Johnson Petteri Lehikoinen David Okill Roni Väisänen Jim Williams Stuart Williams Francis Daunt Jonathan A. Green Winter locations of red‐throated divers from geolocation and feather isotope signatures |
topic_facet |
Gavia GLS isotope loon movement Ecology QH540-549.5 |
description |
Abstract Migratory species have geographically separate distributions during their annual cycle, and these areas can vary between populations and individuals. This can lead to differential stress levels being experienced across a species range. Gathering information on the areas used during the annual cycle of red‐throated divers (RTDs; Gavia stellata) has become an increasingly pressing issue, as they are a species of concern when considering the effects of disturbance from offshore wind farms and the associated ship traffic. Here, we use light‐based geolocator tags, deployed during the summer breeding season, to determine the non‐breeding winter location of RTDs from breeding locations in Scotland, Finland, and Iceland. We also use δ15N and δ13C isotope signatures, from feather samples, to link population‐level differences in areas used in the molt period to population‐level differences in isotope signatures. We found from geolocator data that RTDs from the three different breeding locations did not overlap in their winter distributions. Differences in isotope signatures suggested this spatial separation was also evident in the molting period, when geolocation data were unavailable. We also found that of the three populations, RTDs breeding in Iceland moved the shortest distance from their breeding grounds to their wintering grounds. In contrast, RTDs breeding in Finland moved the furthest, with a westward migration from the Baltic into the southern North Sea. Overall, these results suggest that RTDs breeding in Finland are likely to encounter anthropogenic activity during the winter period, where they currently overlap with areas of future planned developments. Icelandic and Scottish birds are less likely to be affected, due to less ship activity and few or no offshore wind farms in their wintering distributions. We also demonstrate that separating the three populations isotopically is possible and suggest further work to allocate breeding individuals to wintering areas based solely on feather samples. |
format |
Article in Journal/Newspaper |
author |
James Duckworth Susan O'Brien Ib K. Petersen Aevar Petersen Guðmundur Benediktsson Logan Johnson Petteri Lehikoinen David Okill Roni Väisänen Jim Williams Stuart Williams Francis Daunt Jonathan A. Green |
author_facet |
James Duckworth Susan O'Brien Ib K. Petersen Aevar Petersen Guðmundur Benediktsson Logan Johnson Petteri Lehikoinen David Okill Roni Väisänen Jim Williams Stuart Williams Francis Daunt Jonathan A. Green |
author_sort |
James Duckworth |
title |
Winter locations of red‐throated divers from geolocation and feather isotope signatures |
title_short |
Winter locations of red‐throated divers from geolocation and feather isotope signatures |
title_full |
Winter locations of red‐throated divers from geolocation and feather isotope signatures |
title_fullStr |
Winter locations of red‐throated divers from geolocation and feather isotope signatures |
title_full_unstemmed |
Winter locations of red‐throated divers from geolocation and feather isotope signatures |
title_sort |
winter locations of red‐throated divers from geolocation and feather isotope signatures |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1002/ece3.9209 https://doaj.org/article/d96e5fcc86624c0fb931c3d75594bec2 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Ecology and Evolution, Vol 12, Iss 8, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1002/ece3.9209 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.9209 https://doaj.org/article/d96e5fcc86624c0fb931c3d75594bec2 |
op_doi |
https://doi.org/10.1002/ece3.9209 |
container_title |
Ecology and Evolution |
container_volume |
12 |
container_issue |
8 |
_version_ |
1766039306579738624 |