Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts
During the 1960s there was extensive formation of anchor ice to depths of 30 meters at McMurdo Station, Antarctica. During this period the sponge Homaxinella balfourensis was rare, as were its predators in that depth zone. Most of the existing sponges were killed by anchor ice. During the 1970s, anc...
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1989
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craaas:10.1126/science.245.4925.1484 2024-09-15T17:41:59+00:00 Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts Dayton, Paul K. 1989 http://dx.doi.org/10.1126/science.245.4925.1484 https://www.science.org/doi/pdf/10.1126/science.245.4925.1484 en eng American Association for the Advancement of Science (AAAS) Science volume 245, issue 4925, page 1484-1486 ISSN 0036-8075 1095-9203 journal-article 1989 craaas https://doi.org/10.1126/science.245.4925.1484 2024-08-01T04:00:53Z During the 1960s there was extensive formation of anchor ice to depths of 30 meters at McMurdo Station, Antarctica. During this period the sponge Homaxinella balfourensis was rare, as were its predators in that depth zone. Most of the existing sponges were killed by anchor ice. During the 1970s, anchor ice formation was reduced, and there was a massive recruitment of Homaxinella , which covered as much as 80 percent of the substrata in that zone. Many predators appeared but did not control the sponge population, and it continued to grow through that decade. The early 1980s were characterized by ice formation and almost all of the Homaxinella were eliminated, leaving an order of magnitude more predators in that zone. The interdecadal increases in anchor ice probably result from local upwelling of extremely cold deep water, possibly in response to shifts in the strengths of regional currents. Article in Journal/Newspaper Antarc* Antarctic Antarctica AAAS Resource Center (American Association for the Advancement of Science) Science 245 4925 1484 1486 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
During the 1960s there was extensive formation of anchor ice to depths of 30 meters at McMurdo Station, Antarctica. During this period the sponge Homaxinella balfourensis was rare, as were its predators in that depth zone. Most of the existing sponges were killed by anchor ice. During the 1970s, anchor ice formation was reduced, and there was a massive recruitment of Homaxinella , which covered as much as 80 percent of the substrata in that zone. Many predators appeared but did not control the sponge population, and it continued to grow through that decade. The early 1980s were characterized by ice formation and almost all of the Homaxinella were eliminated, leaving an order of magnitude more predators in that zone. The interdecadal increases in anchor ice probably result from local upwelling of extremely cold deep water, possibly in response to shifts in the strengths of regional currents. |
format |
Article in Journal/Newspaper |
author |
Dayton, Paul K. |
spellingShingle |
Dayton, Paul K. Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
author_facet |
Dayton, Paul K. |
author_sort |
Dayton, Paul K. |
title |
Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
title_short |
Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
title_full |
Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
title_fullStr |
Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
title_full_unstemmed |
Interdecadal Variation in an Antarctic Sponge and Its Predators from Oceanographic Climate Shifts |
title_sort |
interdecadal variation in an antarctic sponge and its predators from oceanographic climate shifts |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1126/science.245.4925.1484 https://www.science.org/doi/pdf/10.1126/science.245.4925.1484 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Science volume 245, issue 4925, page 1484-1486 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.245.4925.1484 |
container_title |
Science |
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245 |
container_issue |
4925 |
container_start_page |
1484 |
op_container_end_page |
1486 |
_version_ |
1810488314543734784 |