Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s
Simultaneous, but contrary, decadal-scale changes in population trajectories of two penguin species in the western Pacific and Ross Sea sectors of the Southern Ocean, during the early/mid-1970s and again during 1988–89, correspond to changes in weather and sea ice patterns. These in turn are related...
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crcambridgeupr:10.1017/s0954102005002567 2024-03-03T08:38:27+00:00 Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s AINLEY, DAVID G. CLARKE, ELIZABETH D. ARRIGO, KEVIN FRASER, WILLIAM R. KATO, AKIKO BARTON, KERRY J. WILSON, PETER R. 2005 http://dx.doi.org/10.1017/s0954102005002567 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002567 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 17, issue 2, page 171-182 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2005 crcambridgeupr https://doi.org/10.1017/s0954102005002567 2024-02-08T08:37:57Z Simultaneous, but contrary, decadal-scale changes in population trajectories of two penguin species in the western Pacific and Ross Sea sectors of the Southern Ocean, during the early/mid-1970s and again during 1988–89, correspond to changes in weather and sea ice patterns. These in turn are related to shifts in the semi-annual and Antarctic oscillations. Populations of the two ecologically dissimilar penguin species - Adélie Pygoscelis adeliae and emperor Aptenodytes forsteri - have been tallied annually since the 1950s making these the longest biological datasets for the Antarctic. Both species are obligates of sea ice and, therefore, allowing for the demographic lags inherent in the response of long-lived species to habitat or environmental variation, the proximate mechanisms responsible for the shifts involved changes in coastal wind strength and air and sea temperatures, which in turn affected the seasonal formation and decay of sea ice and polynyas. The latter probably affected such rates as the proportion of adults breeding and ultimately the reproductive output of populations in ways consistent with the two species' opposing sea ice needs. Corresponding patterns for the mid-1970s shift were reflected also in ice-obligate Weddell seal Leptonychotes weddelli populations and the structure of shallow-water sponge communities in the Ross Sea. The 1988–89 shift, by which time many more datasets had become available, was reflected among several ice-frequenting vertebrate species from all Southern Ocean sectors. Therefore, the patterns most clearly identified in the Pacific Sector were apparently spread throughout the high latitudes of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Aptenodytes forsteri Leptonychotes weddelli Pygoscelis adeliae Ross Sea Sea ice Southern Ocean Weddell Seal Cambridge University Press Antarctic Southern Ocean The Antarctic Ross Sea Pacific Weddell Antarctic Science 17 2 171 182 |
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 AINLEY, DAVID G. CLARKE, ELIZABETH D. ARRIGO, KEVIN FRASER, WILLIAM R. KATO, AKIKO BARTON, KERRY J. WILSON, PETER R. Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Simultaneous, but contrary, decadal-scale changes in population trajectories of two penguin species in the western Pacific and Ross Sea sectors of the Southern Ocean, during the early/mid-1970s and again during 1988–89, correspond to changes in weather and sea ice patterns. These in turn are related to shifts in the semi-annual and Antarctic oscillations. Populations of the two ecologically dissimilar penguin species - Adélie Pygoscelis adeliae and emperor Aptenodytes forsteri - have been tallied annually since the 1950s making these the longest biological datasets for the Antarctic. Both species are obligates of sea ice and, therefore, allowing for the demographic lags inherent in the response of long-lived species to habitat or environmental variation, the proximate mechanisms responsible for the shifts involved changes in coastal wind strength and air and sea temperatures, which in turn affected the seasonal formation and decay of sea ice and polynyas. The latter probably affected such rates as the proportion of adults breeding and ultimately the reproductive output of populations in ways consistent with the two species' opposing sea ice needs. Corresponding patterns for the mid-1970s shift were reflected also in ice-obligate Weddell seal Leptonychotes weddelli populations and the structure of shallow-water sponge communities in the Ross Sea. The 1988–89 shift, by which time many more datasets had become available, was reflected among several ice-frequenting vertebrate species from all Southern Ocean sectors. Therefore, the patterns most clearly identified in the Pacific Sector were apparently spread throughout the high latitudes of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
AINLEY, DAVID G. CLARKE, ELIZABETH D. ARRIGO, KEVIN FRASER, WILLIAM R. KATO, AKIKO BARTON, KERRY J. WILSON, PETER R. |
author_facet |
AINLEY, DAVID G. CLARKE, ELIZABETH D. ARRIGO, KEVIN FRASER, WILLIAM R. KATO, AKIKO BARTON, KERRY J. WILSON, PETER R. |
author_sort |
AINLEY, DAVID G. |
title |
Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
title_short |
Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
title_full |
Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
title_fullStr |
Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
title_full_unstemmed |
Decadal-scale changes in the climate and biota of the Pacific sector of the Southern Ocean, 1950s to the 1990s |
title_sort |
decadal-scale changes in the climate and biota of the pacific sector of the southern ocean, 1950s to the 1990s |
publisher |
Cambridge University Press (CUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1017/s0954102005002567 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002567 |
geographic |
Antarctic Southern Ocean The Antarctic Ross Sea Pacific Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Ross Sea Pacific Weddell |
genre |
Antarc* Antarctic Antarctic Science Aptenodytes forsteri Leptonychotes weddelli Pygoscelis adeliae Ross Sea Sea ice Southern Ocean Weddell Seal |
genre_facet |
Antarc* Antarctic Antarctic Science Aptenodytes forsteri Leptonychotes weddelli Pygoscelis adeliae Ross Sea Sea ice Southern Ocean Weddell Seal |
op_source |
Antarctic Science volume 17, issue 2, page 171-182 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102005002567 |
container_title |
Antarctic Science |
container_volume |
17 |
container_issue |
2 |
container_start_page |
171 |
op_container_end_page |
182 |
_version_ |
1792506838989668352 |