Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei
Increasing atmospheric CO2 levels are driving changes in the seawater carbonate system, resulting in higher pCO2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased pCO2, and few on slow-growing polar organisms with a...
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ftpubmed:oai:pubmedcentral.nih.gov:4614754 2023-05-15T13:30:39+02:00 Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela 2015-09-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614754/ http://www.ncbi.nlm.nih.gov/pubmed/26354939 https://doi.org/10.1098/rspb.2015.1513 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614754/ http://www.ncbi.nlm.nih.gov/pubmed/26354939 http://dx.doi.org/10.1098/rspb.2015.1513 © 2015 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Research Articles Text 2015 ftpubmed https://doi.org/10.1098/rspb.2015.1513 2016-09-25T00:01:36Z Increasing atmospheric CO2 levels are driving changes in the seawater carbonate system, resulting in higher pCO2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased pCO2, and few on slow-growing polar organisms with a relative low adaptation potential. In order to recognize the consequences of climate change in biological systems, acclimation and adaptation to new environments are crucial to address. In this study, physiological responses to long-term acclimation (194 days, approx. 60 asexual generations) of three pCO2 levels (280, 390 and 960 µatm) were investigated in the psychrophilic sea ice diatom Nitzschia lecointei. After 147 days, a small reduction in growth was detected at 960 µatm pCO2. Previous short-term experiments have failed to detect altered growth in N. lecointei at high pCO2, which illustrates the importance of experimental duration in studies of climate change. In addition, carbon metabolism was significantly affected by the long-term treatments, resulting in higher cellular release of dissolved organic carbon (DOC). In turn, the release of labile organic carbon stimulated bacterial productivity in this system. We conclude that long-term acclimation to ocean acidification is important for N. lecointei and that carbon overconsumption and DOC exudation may increase in a high-CO2 world. Text Antarc* Antarctic Ocean acidification Sea ice PubMed Central (PMC) Antarctic The Antarctic Proceedings of the Royal Society B: Biological Sciences 282 1815 20151513 |
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Research Articles Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
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Research Articles |
description |
Increasing atmospheric CO2 levels are driving changes in the seawater carbonate system, resulting in higher pCO2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased pCO2, and few on slow-growing polar organisms with a relative low adaptation potential. In order to recognize the consequences of climate change in biological systems, acclimation and adaptation to new environments are crucial to address. In this study, physiological responses to long-term acclimation (194 days, approx. 60 asexual generations) of three pCO2 levels (280, 390 and 960 µatm) were investigated in the psychrophilic sea ice diatom Nitzschia lecointei. After 147 days, a small reduction in growth was detected at 960 µatm pCO2. Previous short-term experiments have failed to detect altered growth in N. lecointei at high pCO2, which illustrates the importance of experimental duration in studies of climate change. In addition, carbon metabolism was significantly affected by the long-term treatments, resulting in higher cellular release of dissolved organic carbon (DOC). In turn, the release of labile organic carbon stimulated bacterial productivity in this system. We conclude that long-term acclimation to ocean acidification is important for N. lecointei and that carbon overconsumption and DOC exudation may increase in a high-CO2 world. |
format |
Text |
author |
Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela |
author_facet |
Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela |
author_sort |
Torstensson, Anders |
title |
Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_short |
Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_full |
Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_fullStr |
Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_full_unstemmed |
Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_sort |
long-term acclimation to elevated pco2 alters carbon metabolism and reduces growth in the antarctic diatom nitzschia lecointei |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614754/ http://www.ncbi.nlm.nih.gov/pubmed/26354939 https://doi.org/10.1098/rspb.2015.1513 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ocean acidification Sea ice |
genre_facet |
Antarc* Antarctic Ocean acidification Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4614754/ http://www.ncbi.nlm.nih.gov/pubmed/26354939 http://dx.doi.org/10.1098/rspb.2015.1513 |
op_rights |
© 2015 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rspb.2015.1513 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
282 |
container_issue |
1815 |
container_start_page |
20151513 |
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1766011118440939520 |