Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei
Increasing atmospheric CO 2 levels are driving changes in the seawater carbonate system, resulting in higher p CO 2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased p CO 2 , and few on slow-growing polar organisms...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2015
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.1513 |
id |
crroyalsociety:10.1098/rspb.2015.1513 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rspb.2015.1513 2024-06-23T07:47:52+00:00 Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela 2015 http://dx.doi.org/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.1513 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1815, page 20151513 ISSN 0962-8452 1471-2954 journal-article 2015 crroyalsociety https://doi.org/10.1098/rspb.2015.1513 2024-06-10T04:15:14Z Increasing atmospheric CO 2 levels are driving changes in the seawater carbonate system, resulting in higher p CO 2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased p CO 2 , 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 p CO 2 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 p CO 2 . Previous short-term experiments have failed to detect altered growth in N. lecointei at high p CO 2 , 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-CO 2 world. Article in Journal/Newspaper Antarc* Antarctic Ocean acidification Sea ice The Royal Society Antarctic The Antarctic Proceedings of the Royal Society B: Biological Sciences 282 1815 20151513 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Increasing atmospheric CO 2 levels are driving changes in the seawater carbonate system, resulting in higher p CO 2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased p CO 2 , 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 p CO 2 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 p CO 2 . Previous short-term experiments have failed to detect altered growth in N. lecointei at high p CO 2 , 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-CO 2 world. |
format |
Article in Journal/Newspaper |
author |
Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela |
spellingShingle |
Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
author_facet |
Torstensson, Anders Hedblom, Mikael Mattsdotter Björk, My Chierici, Melissa Wulff, Angela |
author_sort |
Torstensson, Anders |
title |
Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_short |
Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_full |
Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_fullStr |
Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_full_unstemmed |
Long-term acclimation to elevated p CO 2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei |
title_sort |
long-term acclimation to elevated p co 2 alters carbon metabolism and reduces growth in the antarctic diatom nitzschia lecointei |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://dx.doi.org/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1513 https://royalsocietypublishing.org/doi/full-xml/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_source |
Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1815, page 20151513 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
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 |
_version_ |
1802638093417709568 |