Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean
Anthropogenic inputs of CO2 are altering ocean chemistry and may alter the role of marine calcifiers in ocean ecosystems. Laboratory research and ocean models suggest calcifiers in polar waters are especially at risk, particularly pteropods: pelagic aragonite-shelled molluscs. However, baseline data...
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ftunivtasecite:oai:ecite.utas.edu.au:70527 2023-05-15T13:34:56+02:00 Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean Roberts, D Howard, W Moy, AD Roberts, JL Trull, T Bray, SG Hopcroft, RR 2011 application/pdf https://doi.org/10.1007/s00300-011-1024-z http://ecite.utas.edu.au/70527 en eng Springer-Verlag http://ecite.utas.edu.au/70527/2/interannual pteropod (print version).pdf http://dx.doi.org/10.1007/s00300-011-1024-z Roberts, D and Howard, W and Moy, AD and Roberts, JL and Trull, T and Bray, SG and Hopcroft, RR, Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean, Polar Biology, 34, (11) pp. 1739-1750. ISSN 0722-4060 (2011) [Refereed Article] http://ecite.utas.edu.au/70527 Environmental Sciences Ecological Applications Ecological Impacts of Climate Change Refereed Article PeerReviewed 2011 ftunivtasecite https://doi.org/10.1007/s00300-011-1024-z 2019-12-13T21:38:14Z Anthropogenic inputs of CO2 are altering ocean chemistry and may alter the role of marine calcifiers in ocean ecosystems. Laboratory research and ocean models suggest calcifiers in polar waters are especially at risk, particularly pteropods: pelagic aragonite-shelled molluscs. However, baseline data for natural populations of pteropods are limited, especially for polar and sub-polar waters. In order to establish baseline data on diversity, preservation state and shell flux of in situ populations of Sub-Antarctic Southern Ocean pteropods, we deployed sediment traps above (1,000 m) and below (2,000 m) the aragonite saturation horizon (ASH) (currently at 1,200 m) from 1997 to 2006 at 47S, 142E. We identified seven pteropod taxa. We applied a shell opacity index to each shell collected and found 50% of shells collected above the ASH to be in pristine condition but only 3% of the shells collected below the ASH showed such a high degree of preservation. We estimated pteropod shell mass fluxes for the region (0.174.99 mg m2 day1), and we identified significant reductions in shell flux for Limacina helicina antarctica forma rangi and Clio recurva to the trap series above the ASH and for Limacina helicina antarctica forma rangi and Limacina helicina antarctica forma antarctica to the trap series below the ASH over the interval 19972006. Our data establish a temporal and vertical snapshot of the current Sub-Antarctic pelagic pteropod community and provide a baseline against which to monitor Southern Ocean pteropods responses, if any, to changing ocean conditions projected for the region in the coming decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica Limacina helicina Polar Biology Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Polar Biology 34 11 1739 1750 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Environmental Sciences Ecological Applications Ecological Impacts of Climate Change |
spellingShingle |
Environmental Sciences Ecological Applications Ecological Impacts of Climate Change Roberts, D Howard, W Moy, AD Roberts, JL Trull, T Bray, SG Hopcroft, RR Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
topic_facet |
Environmental Sciences Ecological Applications Ecological Impacts of Climate Change |
description |
Anthropogenic inputs of CO2 are altering ocean chemistry and may alter the role of marine calcifiers in ocean ecosystems. Laboratory research and ocean models suggest calcifiers in polar waters are especially at risk, particularly pteropods: pelagic aragonite-shelled molluscs. However, baseline data for natural populations of pteropods are limited, especially for polar and sub-polar waters. In order to establish baseline data on diversity, preservation state and shell flux of in situ populations of Sub-Antarctic Southern Ocean pteropods, we deployed sediment traps above (1,000 m) and below (2,000 m) the aragonite saturation horizon (ASH) (currently at 1,200 m) from 1997 to 2006 at 47S, 142E. We identified seven pteropod taxa. We applied a shell opacity index to each shell collected and found 50% of shells collected above the ASH to be in pristine condition but only 3% of the shells collected below the ASH showed such a high degree of preservation. We estimated pteropod shell mass fluxes for the region (0.174.99 mg m2 day1), and we identified significant reductions in shell flux for Limacina helicina antarctica forma rangi and Clio recurva to the trap series above the ASH and for Limacina helicina antarctica forma rangi and Limacina helicina antarctica forma antarctica to the trap series below the ASH over the interval 19972006. Our data establish a temporal and vertical snapshot of the current Sub-Antarctic pelagic pteropod community and provide a baseline against which to monitor Southern Ocean pteropods responses, if any, to changing ocean conditions projected for the region in the coming decades. |
format |
Article in Journal/Newspaper |
author |
Roberts, D Howard, W Moy, AD Roberts, JL Trull, T Bray, SG Hopcroft, RR |
author_facet |
Roberts, D Howard, W Moy, AD Roberts, JL Trull, T Bray, SG Hopcroft, RR |
author_sort |
Roberts, D |
title |
Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
title_short |
Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
title_full |
Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
title_fullStr |
Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
title_full_unstemmed |
Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean |
title_sort |
interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the sub-antarctic southern ocean |
publisher |
Springer-Verlag |
publishDate |
2011 |
url |
https://doi.org/10.1007/s00300-011-1024-z http://ecite.utas.edu.au/70527 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Limacina helicina Polar Biology Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Limacina helicina Polar Biology Southern Ocean |
op_relation |
http://ecite.utas.edu.au/70527/2/interannual pteropod (print version).pdf http://dx.doi.org/10.1007/s00300-011-1024-z Roberts, D and Howard, W and Moy, AD and Roberts, JL and Trull, T and Bray, SG and Hopcroft, RR, Interannual pteropod variability in sediment traps deployed above and below the aragonite saturation horizon in the Sub-Antarctic Southern Ocean, Polar Biology, 34, (11) pp. 1739-1750. ISSN 0722-4060 (2011) [Refereed Article] http://ecite.utas.edu.au/70527 |
op_doi |
https://doi.org/10.1007/s00300-011-1024-z |
container_title |
Polar Biology |
container_volume |
34 |
container_issue |
11 |
container_start_page |
1739 |
op_container_end_page |
1750 |
_version_ |
1766059183265808384 |