Acidification increases microbial polysaccharide degradation in the ocean
With the accumulation of anthropogenic carbon dioxide (CO2), a proceeding decline in seawater pH has been induced that is referred to as ocean acidification. The ocean's capacity for CO2 storage is strongly affected by biological processes, whose feedback potential is difficult to evaluate. The...
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Copernicus Publications (EGU)
2010
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Online Access: | https://oceanrep.geomar.de/id/eprint/12186/ https://oceanrep.geomar.de/id/eprint/12186/1/bg-7-1615-2010.pdf https://doi.org/10.5194/bg-7-1615-2010 |
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ftoceanrep:oai:oceanrep.geomar.de:12186 2023-05-15T17:49:42+02:00 Acidification increases microbial polysaccharide degradation in the ocean Piontek, Judith Lunau, M. Händel, N. Borchard, Corinna Wurst, M. Engel, Anja 2010 text https://oceanrep.geomar.de/id/eprint/12186/ https://oceanrep.geomar.de/id/eprint/12186/1/bg-7-1615-2010.pdf https://doi.org/10.5194/bg-7-1615-2010 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/12186/1/bg-7-1615-2010.pdf Piontek, J., Lunau, M., Händel, N., Borchard, C., Wurst, M. and Engel, A. (2010) Acidification increases microbial polysaccharide degradation in the ocean. Open Access Biogeosciences (BG), 7 (5). pp. 1615-1624. DOI 10.5194/bg-7-1615-2010 <https://doi.org/10.5194/bg-7-1615-2010>. doi:10.5194/bg-7-1615-2010 info:eu-repo/semantics/openAccess Article PeerReviewed 2010 ftoceanrep https://doi.org/10.5194/bg-7-1615-2010 2023-04-07T15:00:31Z With the accumulation of anthropogenic carbon dioxide (CO2), a proceeding decline in seawater pH has been induced that is referred to as ocean acidification. The ocean's capacity for CO2 storage is strongly affected by biological processes, whose feedback potential is difficult to evaluate. The main source of CO2 in the ocean is the decomposition and subsequent respiration of organic molecules by heterotrophic bacteria. However, very little is known about potential effects of ocean acidification on bacterial degradation activity. This study reveals that the degradation of polysaccharides, a major component of marine organic matter, by bacterial extracellular enzymes was significantly accelerated during experimental simulation of ocean acidification. Results were obtained from pH perturbation experiments, where rates of extracellular α- and β-glucosidase were measured and the loss of neutral and acidic sugars from phytoplankton-derived polysaccharides was determined. Our study suggests that a faster bacterial turnover of polysaccharides at lowered ocean pH has the potential to reduce carbon export and to enhance the respiratory CO2 production in the future ocean. Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Biogeosciences 7 5 1615 1624 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
With the accumulation of anthropogenic carbon dioxide (CO2), a proceeding decline in seawater pH has been induced that is referred to as ocean acidification. The ocean's capacity for CO2 storage is strongly affected by biological processes, whose feedback potential is difficult to evaluate. The main source of CO2 in the ocean is the decomposition and subsequent respiration of organic molecules by heterotrophic bacteria. However, very little is known about potential effects of ocean acidification on bacterial degradation activity. This study reveals that the degradation of polysaccharides, a major component of marine organic matter, by bacterial extracellular enzymes was significantly accelerated during experimental simulation of ocean acidification. Results were obtained from pH perturbation experiments, where rates of extracellular α- and β-glucosidase were measured and the loss of neutral and acidic sugars from phytoplankton-derived polysaccharides was determined. Our study suggests that a faster bacterial turnover of polysaccharides at lowered ocean pH has the potential to reduce carbon export and to enhance the respiratory CO2 production in the future ocean. |
format |
Article in Journal/Newspaper |
author |
Piontek, Judith Lunau, M. Händel, N. Borchard, Corinna Wurst, M. Engel, Anja |
spellingShingle |
Piontek, Judith Lunau, M. Händel, N. Borchard, Corinna Wurst, M. Engel, Anja Acidification increases microbial polysaccharide degradation in the ocean |
author_facet |
Piontek, Judith Lunau, M. Händel, N. Borchard, Corinna Wurst, M. Engel, Anja |
author_sort |
Piontek, Judith |
title |
Acidification increases microbial polysaccharide degradation in the ocean |
title_short |
Acidification increases microbial polysaccharide degradation in the ocean |
title_full |
Acidification increases microbial polysaccharide degradation in the ocean |
title_fullStr |
Acidification increases microbial polysaccharide degradation in the ocean |
title_full_unstemmed |
Acidification increases microbial polysaccharide degradation in the ocean |
title_sort |
acidification increases microbial polysaccharide degradation in the ocean |
publisher |
Copernicus Publications (EGU) |
publishDate |
2010 |
url |
https://oceanrep.geomar.de/id/eprint/12186/ https://oceanrep.geomar.de/id/eprint/12186/1/bg-7-1615-2010.pdf https://doi.org/10.5194/bg-7-1615-2010 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/12186/1/bg-7-1615-2010.pdf Piontek, J., Lunau, M., Händel, N., Borchard, C., Wurst, M. and Engel, A. (2010) Acidification increases microbial polysaccharide degradation in the ocean. Open Access Biogeosciences (BG), 7 (5). pp. 1615-1624. DOI 10.5194/bg-7-1615-2010 <https://doi.org/10.5194/bg-7-1615-2010>. doi:10.5194/bg-7-1615-2010 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-7-1615-2010 |
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Biogeosciences |
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7 |
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5 |
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1615 |
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1624 |
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1766156121141149696 |