Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini
Polar ecosystems are sensitive to climate forcing, and we often lack baselines to evaluate changes. Here we report a nearly 50-year study in which a sudden shift in the population dynamics of an ecologically important, structure-forming hexactinellid sponge, Anoxycalyx joubini was observed. This is...
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ftoregonstate:ir.library.oregonstate.edu:2227mt53g 2024-09-15T17:45:38+00:00 Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini Dayton, Paul K. Kim, Stacy Jarrell, Shannon C. Oliver, John S. Hammerstrom, Kamille Fisher, Jennifer L. O'Connor, Kevin Barber, Julie S. Robilliard, Gordon Barry, James Thurber, Andrew R. Conlan, Kathy College of Earth, Ocean, and Atmospheric Sciences Hatfield Marine Science Center https://ir.library.oregonstate.edu/concern/articles/2227mt53g English [eng] eng unknown Public Library of Science https://ir.library.oregonstate.edu/concern/articles/2227mt53g Attribution 3.0 United States Article ftoregonstate 2024-07-22T18:06:05Z Polar ecosystems are sensitive to climate forcing, and we often lack baselines to evaluate changes. Here we report a nearly 50-year study in which a sudden shift in the population dynamics of an ecologically important, structure-forming hexactinellid sponge, Anoxycalyx joubini was observed. This is the largest Antarctic sponge, with individuals growing over two meters tall. In order to investigate life history characteristics of Antarctic marine invertebrates, artificial substrata were deployed at a number of sites in the southern portion of the Ross Sea between 1967 and 1975. Over a 22-year period, no growth or settlement was recorded for A. joubini on these substrata; however, in 2004 and 2010, A. joubini was observed to have settled and grown to large sizes on some but not all artificial substrata. This single settlement and growth event correlates with a region-wide shift in phytoplankton productivity driven by the calving of a massive iceberg. We also report almost complete mortality of large sponges followed over 40 years. Given our warming global climate, similar system-wide changes are expected in the future. Article in Journal/Newspaper Antarc* Antarctic Iceberg* Ross Sea ScholarsArchive@OSU (Oregon State University) |
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Open Polar |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
language |
English unknown |
description |
Polar ecosystems are sensitive to climate forcing, and we often lack baselines to evaluate changes. Here we report a nearly 50-year study in which a sudden shift in the population dynamics of an ecologically important, structure-forming hexactinellid sponge, Anoxycalyx joubini was observed. This is the largest Antarctic sponge, with individuals growing over two meters tall. In order to investigate life history characteristics of Antarctic marine invertebrates, artificial substrata were deployed at a number of sites in the southern portion of the Ross Sea between 1967 and 1975. Over a 22-year period, no growth or settlement was recorded for A. joubini on these substrata; however, in 2004 and 2010, A. joubini was observed to have settled and grown to large sizes on some but not all artificial substrata. This single settlement and growth event correlates with a region-wide shift in phytoplankton productivity driven by the calving of a massive iceberg. We also report almost complete mortality of large sponges followed over 40 years. Given our warming global climate, similar system-wide changes are expected in the future. |
author2 |
College of Earth, Ocean, and Atmospheric Sciences Hatfield Marine Science Center |
format |
Article in Journal/Newspaper |
author |
Dayton, Paul K. Kim, Stacy Jarrell, Shannon C. Oliver, John S. Hammerstrom, Kamille Fisher, Jennifer L. O'Connor, Kevin Barber, Julie S. Robilliard, Gordon Barry, James Thurber, Andrew R. Conlan, Kathy |
spellingShingle |
Dayton, Paul K. Kim, Stacy Jarrell, Shannon C. Oliver, John S. Hammerstrom, Kamille Fisher, Jennifer L. O'Connor, Kevin Barber, Julie S. Robilliard, Gordon Barry, James Thurber, Andrew R. Conlan, Kathy Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
author_facet |
Dayton, Paul K. Kim, Stacy Jarrell, Shannon C. Oliver, John S. Hammerstrom, Kamille Fisher, Jennifer L. O'Connor, Kevin Barber, Julie S. Robilliard, Gordon Barry, James Thurber, Andrew R. Conlan, Kathy |
author_sort |
Dayton, Paul K. |
title |
Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
title_short |
Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
title_full |
Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
title_fullStr |
Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
title_full_unstemmed |
Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini |
title_sort |
recruitment, growth and mortality of an antarctic hexactinellid sponge, anoxycalyx joubini |
publisher |
Public Library of Science |
url |
https://ir.library.oregonstate.edu/concern/articles/2227mt53g |
genre |
Antarc* Antarctic Iceberg* Ross Sea |
genre_facet |
Antarc* Antarctic Iceberg* Ross Sea |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/2227mt53g |
op_rights |
Attribution 3.0 United States |
_version_ |
1810493521387323392 |