Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus)
Antarctic sea ice provides an ephemeral but important habitat for algal productivity and is characterised by extreme physiochemical variations. In this study, we assess the ability of a sea ice diatom (Fragilariopsis cylindrus) to cope with physiochemical changes through examination of physiological...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | https://doi.org/10.1016/j.jembe.2013.05.022 http://ecite.utas.edu.au/86104 |
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ftunivtasecite:oai:ecite.utas.edu.au:86104 2023-05-15T13:37:23+02:00 Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) Ugalde, SC Meiners, K Davidson, A Westwood, KJ McMinn, A 2013 https://doi.org/10.1016/j.jembe.2013.05.022 http://ecite.utas.edu.au/86104 en eng Elsevier Science BV http://dx.doi.org/10.1016/j.jembe.2013.05.022 http://purl.org/au-research/grants/arc/DP0880212 Ugalde, SC and Meiners, K and Davidson, A and Westwood, KJ and McMinn, A, Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus), Journal of Experimental Marine Biology and Ecology, 446 pp. 228-235. ISSN 0022-0981 (2013) [Refereed Article] http://ecite.utas.edu.au/86104 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2013 ftunivtasecite https://doi.org/10.1016/j.jembe.2013.05.022 2019-12-13T21:50:14Z Antarctic sea ice provides an ephemeral but important habitat for algal productivity and is characterised by extreme physiochemical variations. In this study, we assess the ability of a sea ice diatom (Fragilariopsis cylindrus) to cope with physiochemical changes through examination of physiological status and allocation of 14C-incorporated organic carbon into particulate and extracellular fractions, using closed-bottle incubations over 49d. Carbon allocation was found to vary with growth stage and shifts in the physicochemical environment, in particular the carbonate system. Total extracellular organic carbon was comprised of at least 85% low molecular weight 14C-colloidal-organic carbon. The relative contribution of 14C-extracellular polymeric substances and 14C-total extracellular organic carbon to 14C-total primary production varied from lag to senescent growth phases, increasing from 0 to 5.7% and 32.9% to 69.5%, respectively. Carbon allocation into 14C-extracellular polymeric substances was correlated with a decline in CO2 availability and increased pH. Overall, the results demonstrate that carbon exudation may play an important role in adaptive algal physiology by buffering cells against biogeochemical shifts within brine channels, induced through photosynthetic activity. 2013. Article in Journal/Newspaper Antarc* Antarctic Sea ice eCite UTAS (University of Tasmania) Antarctic Journal of Experimental Marine Biology and Ecology 446 228 235 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Ugalde, SC Meiners, K Davidson, A Westwood, KJ McMinn, A Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Antarctic sea ice provides an ephemeral but important habitat for algal productivity and is characterised by extreme physiochemical variations. In this study, we assess the ability of a sea ice diatom (Fragilariopsis cylindrus) to cope with physiochemical changes through examination of physiological status and allocation of 14C-incorporated organic carbon into particulate and extracellular fractions, using closed-bottle incubations over 49d. Carbon allocation was found to vary with growth stage and shifts in the physicochemical environment, in particular the carbonate system. Total extracellular organic carbon was comprised of at least 85% low molecular weight 14C-colloidal-organic carbon. The relative contribution of 14C-extracellular polymeric substances and 14C-total extracellular organic carbon to 14C-total primary production varied from lag to senescent growth phases, increasing from 0 to 5.7% and 32.9% to 69.5%, respectively. Carbon allocation into 14C-extracellular polymeric substances was correlated with a decline in CO2 availability and increased pH. Overall, the results demonstrate that carbon exudation may play an important role in adaptive algal physiology by buffering cells against biogeochemical shifts within brine channels, induced through photosynthetic activity. 2013. |
format |
Article in Journal/Newspaper |
author |
Ugalde, SC Meiners, K Davidson, A Westwood, KJ McMinn, A |
author_facet |
Ugalde, SC Meiners, K Davidson, A Westwood, KJ McMinn, A |
author_sort |
Ugalde, SC |
title |
Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
title_short |
Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
title_full |
Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
title_fullStr |
Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
title_full_unstemmed |
Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus) |
title_sort |
photosynthetic carbon allocation of an antarctic sea ice diatom (fragilariopsis cylindrus) |
publisher |
Elsevier Science BV |
publishDate |
2013 |
url |
https://doi.org/10.1016/j.jembe.2013.05.022 http://ecite.utas.edu.au/86104 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
http://dx.doi.org/10.1016/j.jembe.2013.05.022 http://purl.org/au-research/grants/arc/DP0880212 Ugalde, SC and Meiners, K and Davidson, A and Westwood, KJ and McMinn, A, Photosynthetic carbon allocation of an Antarctic sea ice diatom (Fragilariopsis cylindrus), Journal of Experimental Marine Biology and Ecology, 446 pp. 228-235. ISSN 0022-0981 (2013) [Refereed Article] http://ecite.utas.edu.au/86104 |
op_doi |
https://doi.org/10.1016/j.jembe.2013.05.022 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
446 |
container_start_page |
228 |
op_container_end_page |
235 |
_version_ |
1766090970241171456 |