Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales.
Bryozoans exhibit a highly variable chemistry within their calcium carbonate skeletons. Previous studies have shown that the level of Mg-calcite in skeletons increases with increasing seawater temperature. For high-latitude regions such as the Antarctic, which have a low range of annual sea-temperat...
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ftnerc:oai:nora.nerc.ac.uk:503960 2023-05-15T13:03:59+02:00 Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. Loxton, Jennifer Kuklinski, Piotr Barnes, David K. A. Najorka, Jens Spencer Jones, Mary Porter, Joanne S. 2014-07-17 http://nora.nerc.ac.uk/id/eprint/503960/ unknown Inter-Research Loxton, Jennifer; Kuklinski, Piotr; Barnes, David K. A. orcid:0000-0002-9076-7867 Najorka, Jens; Spencer Jones, Mary; Porter, Joanne S. 2014 Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. Marine Ecology Progress Series, 507. 169-180. https://doi.org/10.3354/meps10826 <https://doi.org/10.3354/meps10826> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.3354/meps10826 2023-02-04T19:38:10Z Bryozoans exhibit a highly variable chemistry within their calcium carbonate skeletons. Previous studies have shown that the level of Mg-calcite in skeletons increases with increasing seawater temperature. For high-latitude regions such as the Antarctic, which have a low range of annual sea-temperature variation, there have been no studies on bryozoan skeletons with replicated sampling approaches suitable for statistical testing. Our aim was to conduct high-replicate, multi-site sampling to determine the variability in skeletal mineralogy of bryozoans from a site in Antarctica. During an expedition in January 2012, a total of 584 specimens representing 4 bryozoan species were collected from 8 sites at Adelaide Island, West Antarctic Peninsula, by SCUBA diving. All specimens were sampled within a 3 wk period and were selected to be of similar size, age and breeding status. We compared the variability in the wt% MgCO3 in calcite of skeletons among species and investigated the relative influence of environmental and biological factors on skeleton chemistry. The results of X-ray diffraction analysis showed that the wt% MgCO3 in calcite in bryozoan skeletons was statistically different among sites for all study species. The difference in wt% MgCO3 among sites may be explained by habitat fragmentation driving directional adaptation of isolated populations to local environmental conditions. The relationship between Mg-calcite and temperature was inconsistent among species, and the predicted positive correlation between seawater temperature and Mg-calcite was not exhibited in any of the species examined. On this basis, we suggest that Antarctic bryozoan Mg-calcite should not be considered a reliable indicator of paleo-temperature. Article in Journal/Newspaper Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Adelaide Island ENVELOPE(-68.914,-68.914,-67.762,-67.762) Marine Ecology Progress Series 507 169 180 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Bryozoans exhibit a highly variable chemistry within their calcium carbonate skeletons. Previous studies have shown that the level of Mg-calcite in skeletons increases with increasing seawater temperature. For high-latitude regions such as the Antarctic, which have a low range of annual sea-temperature variation, there have been no studies on bryozoan skeletons with replicated sampling approaches suitable for statistical testing. Our aim was to conduct high-replicate, multi-site sampling to determine the variability in skeletal mineralogy of bryozoans from a site in Antarctica. During an expedition in January 2012, a total of 584 specimens representing 4 bryozoan species were collected from 8 sites at Adelaide Island, West Antarctic Peninsula, by SCUBA diving. All specimens were sampled within a 3 wk period and were selected to be of similar size, age and breeding status. We compared the variability in the wt% MgCO3 in calcite of skeletons among species and investigated the relative influence of environmental and biological factors on skeleton chemistry. The results of X-ray diffraction analysis showed that the wt% MgCO3 in calcite in bryozoan skeletons was statistically different among sites for all study species. The difference in wt% MgCO3 among sites may be explained by habitat fragmentation driving directional adaptation of isolated populations to local environmental conditions. The relationship between Mg-calcite and temperature was inconsistent among species, and the predicted positive correlation between seawater temperature and Mg-calcite was not exhibited in any of the species examined. On this basis, we suggest that Antarctic bryozoan Mg-calcite should not be considered a reliable indicator of paleo-temperature. |
format |
Article in Journal/Newspaper |
author |
Loxton, Jennifer Kuklinski, Piotr Barnes, David K. A. Najorka, Jens Spencer Jones, Mary Porter, Joanne S. |
spellingShingle |
Loxton, Jennifer Kuklinski, Piotr Barnes, David K. A. Najorka, Jens Spencer Jones, Mary Porter, Joanne S. Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
author_facet |
Loxton, Jennifer Kuklinski, Piotr Barnes, David K. A. Najorka, Jens Spencer Jones, Mary Porter, Joanne S. |
author_sort |
Loxton, Jennifer |
title |
Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
title_short |
Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
title_full |
Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
title_fullStr |
Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
title_full_unstemmed |
Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. |
title_sort |
variability of mg-calcite in antarctic bryozoan skeletons across spatial scales. |
publisher |
Inter-Research |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/503960/ |
long_lat |
ENVELOPE(-68.914,-68.914,-67.762,-67.762) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Adelaide Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Adelaide Island |
genre |
Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Loxton, Jennifer; Kuklinski, Piotr; Barnes, David K. A. orcid:0000-0002-9076-7867 Najorka, Jens; Spencer Jones, Mary; Porter, Joanne S. 2014 Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. Marine Ecology Progress Series, 507. 169-180. https://doi.org/10.3354/meps10826 <https://doi.org/10.3354/meps10826> |
op_doi |
https://doi.org/10.3354/meps10826 |
container_title |
Marine Ecology Progress Series |
container_volume |
507 |
container_start_page |
169 |
op_container_end_page |
180 |
_version_ |
1766349558626910208 |