Organic matter turnover by pelagic microorganisms under the impact of ocean acidification
Marine bacteria are the main consumers of the organic matter and largely control 2 and CO 2 budgets in the ocean. The present increase in anthropogenic O 2 emissions is constantly decreasing seawater pH. This ocean acidification is expected to affect enzymatic hydrolysis of organic compounds with so...
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ftawi:oai:epic.awi.de:33365 2024-09-15T18:27:36+00:00 Organic matter turnover by pelagic microorganisms under the impact of ocean acidification Endres, Sonja Flerus, Ruth Galgani, Luisa Roa, Jon Engel, Anja 2013-02 https://epic.awi.de/id/eprint/33365/ https://hdl.handle.net/10013/epic.41989 unknown Endres, S. , Flerus, R. , Galgani, L. , Roa, J. and Engel, A. (2013) Organic matter turnover by pelagic microorganisms under the impact of ocean acidification , ASLO Aquatic Science Meeting, New Orleans, USA . hdl:10013/epic.41989 EPIC3ASLO Aquatic Science Meeting, New Orleans, USA Conference notRev 2013 ftawi 2024-06-24T04:07:26Z Marine bacteria are the main consumers of the organic matter and largely control 2 and CO 2 budgets in the ocean. The present increase in anthropogenic O 2 emissions is constantly decreasing seawater pH. This ocean acidification is expected to affect enzymatic hydrolysis of organic compounds with so-far unknown consequences for microbial physiology, organic matter cycling and marine biogeochemistry. We studied the effect of ocean acidification on a natural plankton community during a large-scale mesocosm study in the Raunefjord (Norway). We determined the concentration and composition of dissolved organic matter, in particular combined carbohydrates and amino acid, as well as marine gel particles, bacterial growth and enzymatic rates of organic matter hydrolysis. Dissolved organic carbon concentrations were increasing over time in all treatments while dissolved organic nitrogen concentrations remained stable. We observed higher protein hydrolysis rates, gel particle concentrations, and bacterial cell numbers in the low pH treatments. We conclude that ocean acidification may favor bacterial growth and degradation activities and therewith potentially change organic matter composition and cycling in the future ocean. Conference Object Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Marine bacteria are the main consumers of the organic matter and largely control 2 and CO 2 budgets in the ocean. The present increase in anthropogenic O 2 emissions is constantly decreasing seawater pH. This ocean acidification is expected to affect enzymatic hydrolysis of organic compounds with so-far unknown consequences for microbial physiology, organic matter cycling and marine biogeochemistry. We studied the effect of ocean acidification on a natural plankton community during a large-scale mesocosm study in the Raunefjord (Norway). We determined the concentration and composition of dissolved organic matter, in particular combined carbohydrates and amino acid, as well as marine gel particles, bacterial growth and enzymatic rates of organic matter hydrolysis. Dissolved organic carbon concentrations were increasing over time in all treatments while dissolved organic nitrogen concentrations remained stable. We observed higher protein hydrolysis rates, gel particle concentrations, and bacterial cell numbers in the low pH treatments. We conclude that ocean acidification may favor bacterial growth and degradation activities and therewith potentially change organic matter composition and cycling in the future ocean. |
format |
Conference Object |
author |
Endres, Sonja Flerus, Ruth Galgani, Luisa Roa, Jon Engel, Anja |
spellingShingle |
Endres, Sonja Flerus, Ruth Galgani, Luisa Roa, Jon Engel, Anja Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
author_facet |
Endres, Sonja Flerus, Ruth Galgani, Luisa Roa, Jon Engel, Anja |
author_sort |
Endres, Sonja |
title |
Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
title_short |
Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
title_full |
Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
title_fullStr |
Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
title_full_unstemmed |
Organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
title_sort |
organic matter turnover by pelagic microorganisms under the impact of ocean acidification |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/33365/ https://hdl.handle.net/10013/epic.41989 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3ASLO Aquatic Science Meeting, New Orleans, USA |
op_relation |
Endres, S. , Flerus, R. , Galgani, L. , Roa, J. and Engel, A. (2013) Organic matter turnover by pelagic microorganisms under the impact of ocean acidification , ASLO Aquatic Science Meeting, New Orleans, USA . hdl:10013/epic.41989 |
_version_ |
1810468843755143168 |