Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling?
Abstract Wide-ranging, surface-feeding pelagic seabirds are the most numerous functional group of birds in the Southern Ocean. The mesoscale habitat use of these birds is increasingly being quantified by relating their movements to remotely sensed, near surface properties of the ocean. However, prey...
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2012
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Online Access: | http://dx.doi.org/10.1017/s0954102012000132 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000132 |
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crcambridgeupr:10.1017/s0954102012000132 2024-03-03T08:38:12+00:00 Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? Wakefield, Ewan D. Phillips, Richard A. Belchier, Mark 2012 http://dx.doi.org/10.1017/s0954102012000132 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000132 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 24, issue 3, page 269-280 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0954102012000132 2024-02-08T08:36:18Z Abstract Wide-ranging, surface-feeding pelagic seabirds are the most numerous functional group of birds in the Southern Ocean. The mesoscale habitat use of these birds is increasingly being quantified by relating their movements to remotely sensed, near surface properties of the ocean. However, prey availability at the sea surface may also be determined by habitat characteristics not measurable from space. For instance, benthic-pelagic coupling, which occurs when seabed processes affect productivity in the epipelagic zone, can link benthic habitat type to availability of surface prey. We combined acoustically derived maps of the substrate of the South Georgia shelf with GPS tracking to quantify the sub-mesoscale habitat use of breeding black-browed albatrosses. We show that albatrosses preferentially used waters overlaying glacial moraine banks near the shelf edge and that this was unrelated to the presence of trawlers targeting mackerel icefish, which are also associated with these features. Stomach temperature profiles suggest that albatrosses primarily caught krill and fish over the banks. We hypothesize that black-browed albatrosses target waters overlaying moraine banks due to upward benthic-pelagic coupling, mediated by an increase in abundance of zooplankton such as Antarctic krill. Our findings suggest that the potential effects of such processes on pelagic seabird distribution warrant wider investigation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Science Icefish Southern Ocean Cambridge University Press Antarctic Southern Ocean Antarctic Science 24 3 269 280 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Wakefield, Ewan D. Phillips, Richard A. Belchier, Mark Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Wide-ranging, surface-feeding pelagic seabirds are the most numerous functional group of birds in the Southern Ocean. The mesoscale habitat use of these birds is increasingly being quantified by relating their movements to remotely sensed, near surface properties of the ocean. However, prey availability at the sea surface may also be determined by habitat characteristics not measurable from space. For instance, benthic-pelagic coupling, which occurs when seabed processes affect productivity in the epipelagic zone, can link benthic habitat type to availability of surface prey. We combined acoustically derived maps of the substrate of the South Georgia shelf with GPS tracking to quantify the sub-mesoscale habitat use of breeding black-browed albatrosses. We show that albatrosses preferentially used waters overlaying glacial moraine banks near the shelf edge and that this was unrelated to the presence of trawlers targeting mackerel icefish, which are also associated with these features. Stomach temperature profiles suggest that albatrosses primarily caught krill and fish over the banks. We hypothesize that black-browed albatrosses target waters overlaying moraine banks due to upward benthic-pelagic coupling, mediated by an increase in abundance of zooplankton such as Antarctic krill. Our findings suggest that the potential effects of such processes on pelagic seabird distribution warrant wider investigation. |
format |
Article in Journal/Newspaper |
author |
Wakefield, Ewan D. Phillips, Richard A. Belchier, Mark |
author_facet |
Wakefield, Ewan D. Phillips, Richard A. Belchier, Mark |
author_sort |
Wakefield, Ewan D. |
title |
Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
title_short |
Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
title_full |
Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
title_fullStr |
Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
title_full_unstemmed |
Foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
title_sort |
foraging black-browed albatrosses target waters overlaying moraine banks - a consequence of upward benthic-pelagic coupling? |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0954102012000132 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012000132 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Science Icefish Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Science Icefish Southern Ocean |
op_source |
Antarctic Science volume 24, issue 3, page 269-280 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102012000132 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
3 |
container_start_page |
269 |
op_container_end_page |
280 |
_version_ |
1792505547560321024 |