Contrasting migratory responses of two closely related seabirds to long-term climate change
Many marine predators migrate between breeding and non-breeding areas to target resources that are seasonal but spatio-temporally predictable, and so are vulnerable to climate-induced changes in prey phenology and abundance. In the Southern Ocean, small petrels are major consumers, but perturbations...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/515554/ https://nora.nerc.ac.uk/id/eprint/515554/1/Grecian.pdf https://doi.org/10.3354/meps11875 |
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ftnerc:oai:nora.nerc.ac.uk:515554 2023-05-15T13:49:33+02:00 Contrasting migratory responses of two closely related seabirds to long-term climate change Grecian, W. James Taylor, Graeme A. Loh, Graeme McGill, Rona A.R. Miskelly, Colin M. Phillips, Richard A. Thompson, David R. Furness, Robert W. 2016-11 text http://nora.nerc.ac.uk/id/eprint/515554/ https://nora.nerc.ac.uk/id/eprint/515554/1/Grecian.pdf https://doi.org/10.3354/meps11875 en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/515554/1/Grecian.pdf Grecian, W. James; Taylor, Graeme A.; Loh, Graeme; McGill, Rona A.R.; Miskelly, Colin M.; Phillips, Richard A.; Thompson, David R.; Furness, Robert W. 2016 Contrasting migratory responses of two closely related seabirds to long-term climate change. Marine Ecology Progress Series, 559. 231-242. https://doi.org/10.3354/meps11875 <https://doi.org/10.3354/meps11875> cc_by_4 CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.3354/meps11875 2023-02-04T19:44:05Z Many marine predators migrate between breeding and non-breeding areas to target resources that are seasonal but spatio-temporally predictable, and so are vulnerable to climate-induced changes in prey phenology and abundance. In the Southern Ocean, small petrels are major consumers, but perturbations in the ecosystem through ocean warming are altering food-web structure and have been linked to poleward shifts in the distribution of their cold-water zooplankton prey. In this study, we focused on 2 small congeneric petrels: the broad-billed prion Pachyptila vittata and the Antarctic prion P. desolata. Both are planktivorous, but the broad-billed prion specialises in feeding on large copepods. We investigated historical trends in non-breeding distribution by analysing feather stable isotope ratios from a time-series dating back to 1926, and examined contemporary non-breeding distributions of broad-billed prions tracked using miniaturised geolocation-immersion loggers. After controlling temporally for the Suess effect, we found that the δ13C signatures of Antarctic prions, but not broad-billed prions, declined during the study period. This suggests a southward shift in Antarctic prion non-breeding distribution over the last century. Both species exhibited significant declines in δ15N during the same period, indicative of long-term decreases in marine productivity in their moulting areas, or changes in the trophic structure of prey communities. Tracked broad-billed prions migrated ca. 1000 km to an area east of the breeding colony where the Louisville seamount chain bisects the subtropical front. Topographically driven upwellings are stable and predictable features and may be crucial in aggregating plankton. Targeting seamounts could therefore mitigate the impact of climate-induced prey shifts by providing refugia for the broad-billed prion. Article in Journal/Newspaper Antarc* Antarctic Antarctic prion Southern Ocean Copepods Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Marine Ecology Progress Series 559 231 242 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Many marine predators migrate between breeding and non-breeding areas to target resources that are seasonal but spatio-temporally predictable, and so are vulnerable to climate-induced changes in prey phenology and abundance. In the Southern Ocean, small petrels are major consumers, but perturbations in the ecosystem through ocean warming are altering food-web structure and have been linked to poleward shifts in the distribution of their cold-water zooplankton prey. In this study, we focused on 2 small congeneric petrels: the broad-billed prion Pachyptila vittata and the Antarctic prion P. desolata. Both are planktivorous, but the broad-billed prion specialises in feeding on large copepods. We investigated historical trends in non-breeding distribution by analysing feather stable isotope ratios from a time-series dating back to 1926, and examined contemporary non-breeding distributions of broad-billed prions tracked using miniaturised geolocation-immersion loggers. After controlling temporally for the Suess effect, we found that the δ13C signatures of Antarctic prions, but not broad-billed prions, declined during the study period. This suggests a southward shift in Antarctic prion non-breeding distribution over the last century. Both species exhibited significant declines in δ15N during the same period, indicative of long-term decreases in marine productivity in their moulting areas, or changes in the trophic structure of prey communities. Tracked broad-billed prions migrated ca. 1000 km to an area east of the breeding colony where the Louisville seamount chain bisects the subtropical front. Topographically driven upwellings are stable and predictable features and may be crucial in aggregating plankton. Targeting seamounts could therefore mitigate the impact of climate-induced prey shifts by providing refugia for the broad-billed prion. |
format |
Article in Journal/Newspaper |
author |
Grecian, W. James Taylor, Graeme A. Loh, Graeme McGill, Rona A.R. Miskelly, Colin M. Phillips, Richard A. Thompson, David R. Furness, Robert W. |
spellingShingle |
Grecian, W. James Taylor, Graeme A. Loh, Graeme McGill, Rona A.R. Miskelly, Colin M. Phillips, Richard A. Thompson, David R. Furness, Robert W. Contrasting migratory responses of two closely related seabirds to long-term climate change |
author_facet |
Grecian, W. James Taylor, Graeme A. Loh, Graeme McGill, Rona A.R. Miskelly, Colin M. Phillips, Richard A. Thompson, David R. Furness, Robert W. |
author_sort |
Grecian, W. James |
title |
Contrasting migratory responses of two closely related seabirds to long-term climate change |
title_short |
Contrasting migratory responses of two closely related seabirds to long-term climate change |
title_full |
Contrasting migratory responses of two closely related seabirds to long-term climate change |
title_fullStr |
Contrasting migratory responses of two closely related seabirds to long-term climate change |
title_full_unstemmed |
Contrasting migratory responses of two closely related seabirds to long-term climate change |
title_sort |
contrasting migratory responses of two closely related seabirds to long-term climate change |
publisher |
Inter-Research |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/515554/ https://nora.nerc.ac.uk/id/eprint/515554/1/Grecian.pdf https://doi.org/10.3354/meps11875 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic prion Southern Ocean Copepods |
genre_facet |
Antarc* Antarctic Antarctic prion Southern Ocean Copepods |
op_relation |
https://nora.nerc.ac.uk/id/eprint/515554/1/Grecian.pdf Grecian, W. James; Taylor, Graeme A.; Loh, Graeme; McGill, Rona A.R.; Miskelly, Colin M.; Phillips, Richard A.; Thompson, David R.; Furness, Robert W. 2016 Contrasting migratory responses of two closely related seabirds to long-term climate change. Marine Ecology Progress Series, 559. 231-242. https://doi.org/10.3354/meps11875 <https://doi.org/10.3354/meps11875> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3354/meps11875 |
container_title |
Marine Ecology Progress Series |
container_volume |
559 |
container_start_page |
231 |
op_container_end_page |
242 |
_version_ |
1766251612111634432 |