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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ftcdlib:oai:escholarship.org/ark:/13030/qt1bx5m6dx 2023-05-15T14:00:50+02:00 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 e56939 2013-01-01 application/pdf https://escholarship.org/uc/item/1bx5m6dx unknown eScholarship, University of California qt1bx5m6dx https://escholarship.org/uc/item/1bx5m6dx public PloS one, vol 8, iss 2 Animals Porifera Biomass Ice Cover Geography Time Factors Antarctic Regions Oceans and Seas General Science & Technology article 2013 ftcdlib 2020-06-06T07:53:09Z 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 University of California: eScholarship Antarctic Ross Sea |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Animals Porifera Biomass Ice Cover Geography Time Factors Antarctic Regions Oceans and Seas General Science & Technology |
spellingShingle |
Animals Porifera Biomass Ice Cover Geography Time Factors Antarctic Regions Oceans and Seas General Science & Technology 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. |
topic_facet |
Animals Porifera Biomass Ice Cover Geography Time Factors Antarctic Regions Oceans and Seas General Science & Technology |
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. |
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 |
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 |
eScholarship, University of California |
publishDate |
2013 |
url |
https://escholarship.org/uc/item/1bx5m6dx |
op_coverage |
e56939 |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Iceberg* Ross Sea |
genre_facet |
Antarc* Antarctic Iceberg* Ross Sea |
op_source |
PloS one, vol 8, iss 2 |
op_relation |
qt1bx5m6dx https://escholarship.org/uc/item/1bx5m6dx |
op_rights |
public |
_version_ |
1766270173728210944 |