Climate Change and Trophic Response of the Antarctic Bottom Fauna
Background: As Earth warms, temperate and subpolar marine species will increasingly shift their geographic ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the durophagous (shell-break...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.358.4634 2023-05-15T13:41:56+02:00 Climate Change and Trophic Response of the Antarctic Bottom Fauna Richard B. Aronson Ryan M. Moody Linda C. Ivany Daniel B. Blake John E. Werner ¤a Alexander Glass ¤b The Pennsylvania State University CiteSeerX Archives application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.4634 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.4634 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/cf/2a/PLoS_ONE_2009_Feb_5_4(2)_e4385.tar.gz text ftciteseerx 2016-01-08T00:40:53Z Background: As Earth warms, temperate and subpolar marine species will increasingly shift their geographic ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the durophagous (shell-breaking) predators that structure shallow-benthic communities elsewhere. Methodology/Principal Findings: We used the Eocene fossil record from Seymour Island, Antarctic Peninsula, to project specifically how global warming will reorganize the nearshore benthos of Antarctica. A long-term cooling trend, which began with a sharp temperature drop,41 Ma (million years ago), eliminated durophagous predators—teleosts (modern bony fish), decapod crustaceans (crabs and lobsters) and almost all neoselachian elasmobranchs (modern sharks and rays)— from Antarctic nearshore waters after the Eocene. Even prior to those extinctions, durophagous predators became less active as coastal sea temperatures declined from 41 Ma to the end of the Eocene,,33.5 Ma. In response, dense populations of suspension-feeding ophiuroids and crinoids abruptly appeared. Dense aggregations of brachiopods transcended the cooling event with no apparent change in predation pressure, nor were there changes in the frequency of shell-drilling predation on venerid bivalves. Conclusions/Significance: Rapid warming in the Southern Ocean is now removing the physiological barriers to shellbreaking Text Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean Unknown Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Southern Ocean The Antarctic |
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English |
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Background: As Earth warms, temperate and subpolar marine species will increasingly shift their geographic ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the durophagous (shell-breaking) predators that structure shallow-benthic communities elsewhere. Methodology/Principal Findings: We used the Eocene fossil record from Seymour Island, Antarctic Peninsula, to project specifically how global warming will reorganize the nearshore benthos of Antarctica. A long-term cooling trend, which began with a sharp temperature drop,41 Ma (million years ago), eliminated durophagous predators—teleosts (modern bony fish), decapod crustaceans (crabs and lobsters) and almost all neoselachian elasmobranchs (modern sharks and rays)— from Antarctic nearshore waters after the Eocene. Even prior to those extinctions, durophagous predators became less active as coastal sea temperatures declined from 41 Ma to the end of the Eocene,,33.5 Ma. In response, dense populations of suspension-feeding ophiuroids and crinoids abruptly appeared. Dense aggregations of brachiopods transcended the cooling event with no apparent change in predation pressure, nor were there changes in the frequency of shell-drilling predation on venerid bivalves. Conclusions/Significance: Rapid warming in the Southern Ocean is now removing the physiological barriers to shellbreaking |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Richard B. Aronson Ryan M. Moody Linda C. Ivany Daniel B. Blake John E. Werner ¤a Alexander Glass ¤b |
spellingShingle |
Richard B. Aronson Ryan M. Moody Linda C. Ivany Daniel B. Blake John E. Werner ¤a Alexander Glass ¤b Climate Change and Trophic Response of the Antarctic Bottom Fauna |
author_facet |
Richard B. Aronson Ryan M. Moody Linda C. Ivany Daniel B. Blake John E. Werner ¤a Alexander Glass ¤b |
author_sort |
Richard B. Aronson |
title |
Climate Change and Trophic Response of the Antarctic Bottom Fauna |
title_short |
Climate Change and Trophic Response of the Antarctic Bottom Fauna |
title_full |
Climate Change and Trophic Response of the Antarctic Bottom Fauna |
title_fullStr |
Climate Change and Trophic Response of the Antarctic Bottom Fauna |
title_full_unstemmed |
Climate Change and Trophic Response of the Antarctic Bottom Fauna |
title_sort |
climate change and trophic response of the antarctic bottom fauna |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.4634 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Seymour Seymour Island Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Seymour Island Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean |
op_source |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/cf/2a/PLoS_ONE_2009_Feb_5_4(2)_e4385.tar.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.4634 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766160677721866240 |