Effects of CO\(_2\) concentration on a late summer surface sea ice community
Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the sam...
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ftunivtasmania:oai:eprints.utas.edu.au:24827 2023-05-15T13:31:52+02:00 Effects of CO\(_2\) concentration on a late summer surface sea ice community McMinn, A Muller, MN Martin, A Ugalde, SC Lee, SH Castrisios, K Ryan, KG 2017 https://eprints.utas.edu.au/24827/ https://doi.org/10.1007/s00227-017-3102-4 unknown Springer-Verlag McMinn, A orcid:0000-0002-2133-3854 , Muller, MN, Martin, A orcid:0000-0001-8260-5529 , Ugalde, SC, Lee, SH, Castrisios, K and Ryan, KG 2017 , 'Effects of CO\(_2\) concentration on a late summer surface sea ice community' , Marine Biology, vol. 164, no. 4 , pp. 1-10 , doi:10.1007/s00227-017-3102-4 <http://dx.doi.org/10.1007/s00227-017-3102-4>. sea ice algae CO2 Antarctica pH brine summer Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1007/s00227-017-3102-4 2021-08-16T22:17:34Z Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the same time, pH levels can rise above 9 and nutrients can become limiting. In January 2014, the sea ice microbial community from the top 30 cm of the ice was exposed to a gradient of pH and CO2 (5 treatments) that ranged from 8.87 to 7.12 and 5–215 µmol CO2 kg−1, respectively, and incubated in situ. While growth rates were reduced at the highest and lowest pH, the differences were not significant. Likewise, there were no significant differences in maximum quantum yield of PSII (Fv/Fm) or relative maximum electron transfer rates (rETRmax) among treatments. In a parallel experiment, a CO2 gradient of 26–230 µmol CO2 kg−1 (5 treatments) was tested, keeping pH constant. In this experiment, growth rates increased by approximately 40% with increasing CO2, although differences among treatments were not significant. As in the previous experiment, there was no significant response in Fv/Fm or rETRmax. A synchronous grazing dilution experiment found grazing rates to be inconclusive These results suggest that the summer sea ice brine communities were not limited by in situ CO2 concentrations and were not adversely affected by pH values down to 7.1. Article in Journal/Newspaper Antarc* Antarctica ice algae Sea ice University of Tasmania: UTas ePrints Scott Base ENVELOPE(166.766,166.766,-77.849,-77.849) Marine Biology 164 4 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
sea ice algae CO2 Antarctica pH brine summer |
spellingShingle |
sea ice algae CO2 Antarctica pH brine summer McMinn, A Muller, MN Martin, A Ugalde, SC Lee, SH Castrisios, K Ryan, KG Effects of CO\(_2\) concentration on a late summer surface sea ice community |
topic_facet |
sea ice algae CO2 Antarctica pH brine summer |
description |
Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the same time, pH levels can rise above 9 and nutrients can become limiting. In January 2014, the sea ice microbial community from the top 30 cm of the ice was exposed to a gradient of pH and CO2 (5 treatments) that ranged from 8.87 to 7.12 and 5–215 µmol CO2 kg−1, respectively, and incubated in situ. While growth rates were reduced at the highest and lowest pH, the differences were not significant. Likewise, there were no significant differences in maximum quantum yield of PSII (Fv/Fm) or relative maximum electron transfer rates (rETRmax) among treatments. In a parallel experiment, a CO2 gradient of 26–230 µmol CO2 kg−1 (5 treatments) was tested, keeping pH constant. In this experiment, growth rates increased by approximately 40% with increasing CO2, although differences among treatments were not significant. As in the previous experiment, there was no significant response in Fv/Fm or rETRmax. A synchronous grazing dilution experiment found grazing rates to be inconclusive These results suggest that the summer sea ice brine communities were not limited by in situ CO2 concentrations and were not adversely affected by pH values down to 7.1. |
format |
Article in Journal/Newspaper |
author |
McMinn, A Muller, MN Martin, A Ugalde, SC Lee, SH Castrisios, K Ryan, KG |
author_facet |
McMinn, A Muller, MN Martin, A Ugalde, SC Lee, SH Castrisios, K Ryan, KG |
author_sort |
McMinn, A |
title |
Effects of CO\(_2\) concentration on a late summer surface sea ice community |
title_short |
Effects of CO\(_2\) concentration on a late summer surface sea ice community |
title_full |
Effects of CO\(_2\) concentration on a late summer surface sea ice community |
title_fullStr |
Effects of CO\(_2\) concentration on a late summer surface sea ice community |
title_full_unstemmed |
Effects of CO\(_2\) concentration on a late summer surface sea ice community |
title_sort |
effects of co\(_2\) concentration on a late summer surface sea ice community |
publisher |
Springer-Verlag |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/24827/ https://doi.org/10.1007/s00227-017-3102-4 |
long_lat |
ENVELOPE(166.766,166.766,-77.849,-77.849) |
geographic |
Scott Base |
geographic_facet |
Scott Base |
genre |
Antarc* Antarctica ice algae Sea ice |
genre_facet |
Antarc* Antarctica ice algae Sea ice |
op_relation |
McMinn, A orcid:0000-0002-2133-3854 , Muller, MN, Martin, A orcid:0000-0001-8260-5529 , Ugalde, SC, Lee, SH, Castrisios, K and Ryan, KG 2017 , 'Effects of CO\(_2\) concentration on a late summer surface sea ice community' , Marine Biology, vol. 164, no. 4 , pp. 1-10 , doi:10.1007/s00227-017-3102-4 <http://dx.doi.org/10.1007/s00227-017-3102-4>. |
op_doi |
https://doi.org/10.1007/s00227-017-3102-4 |
container_title |
Marine Biology |
container_volume |
164 |
container_issue |
4 |
_version_ |
1766021653340356608 |