Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature
Arctic areas of deep-water convection have a large potential for export of organic carbon from surface waters into the deep sea and, therefore, are an important part of the global carbon cycle. As the Arctic is reportedly heating up faster than any other part of the planet, temperature-driven change...
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Online Access: | http://hdl.handle.net/10261/59698 https://doi.org/10.1007/s00300-010-0799-7 |
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ftcsic:oai:digital.csic.es:10261/59698 2024-02-11T10:00:40+01:00 Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature Kritzberg, Emma S. Duarte, Carlos M. Wassmann, Paul F. 2010 http://hdl.handle.net/10261/59698 https://doi.org/10.1007/s00300-010-0799-7 en eng Springer #PLACEHOLDER_PARENT_METADATA_VALUE# 176096/S30; doi:10.1007/s00300-010-0799-7 issn: 0722-4060 Polar Biology 33: 1673- 1682 (2010) http://hdl.handle.net/10261/59698 none artículo http://purl.org/coar/resource_type/c_6501 2010 ftcsic https://doi.org/10.1007/s00300-010-0799-7 2024-01-16T09:42:14Z Arctic areas of deep-water convection have a large potential for export of organic carbon from surface waters into the deep sea and, therefore, are an important part of the global carbon cycle. As the Arctic is reportedly heating up faster than any other part of the planet, temperature-driven changes in the biogeochemical cycling in these areas can be very significant. Here, we study the regulation of bacterial carbon metabolism, which process vast amounts of organic carbon, by temperature and the availability of resources. The response of bacterial production and respiration of natural bacterial assemblages from the Fram Strait was studied by experimental manipulations of temperature and resources in combination. Both bacterial production and respiration were enhanced by temperature so that the total bacterial carbon demand increased sixfold following a temperature increase of 6°C. Respiration responded more strongly than production so that bacterial growth efficiency decreased with increasing temperature. Although neither production nor respiration was limited by resource availability under in situ conditions, the response to temperature was higher in resource-amended treatments, indicative of a substrate-temperature interaction regulating both components of bacterial metabolism. In conclusion, the results show that warming can result in a substantial increase of the carbon flow through bacteria and that most of the carbon consumed would be released as CO2. Moreover, the results suggest that both temperature and availability of resources need to be considered to accurately be able to predict changes in bacterial carbon metabolism in response to climate change. © 2010 Springer-Verlag. This research is a contribution to the Arctic Tipping Points project (www.eu-atp.org) funded by FP7 of the European Union (contract Peer Reviewed Article in Journal/Newspaper Arctic Climate change Fram Strait Polar Biology Digital.CSIC (Spanish National Research Council) Arctic Polar Biology 33 12 1673 1682 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
Arctic areas of deep-water convection have a large potential for export of organic carbon from surface waters into the deep sea and, therefore, are an important part of the global carbon cycle. As the Arctic is reportedly heating up faster than any other part of the planet, temperature-driven changes in the biogeochemical cycling in these areas can be very significant. Here, we study the regulation of bacterial carbon metabolism, which process vast amounts of organic carbon, by temperature and the availability of resources. The response of bacterial production and respiration of natural bacterial assemblages from the Fram Strait was studied by experimental manipulations of temperature and resources in combination. Both bacterial production and respiration were enhanced by temperature so that the total bacterial carbon demand increased sixfold following a temperature increase of 6°C. Respiration responded more strongly than production so that bacterial growth efficiency decreased with increasing temperature. Although neither production nor respiration was limited by resource availability under in situ conditions, the response to temperature was higher in resource-amended treatments, indicative of a substrate-temperature interaction regulating both components of bacterial metabolism. In conclusion, the results show that warming can result in a substantial increase of the carbon flow through bacteria and that most of the carbon consumed would be released as CO2. Moreover, the results suggest that both temperature and availability of resources need to be considered to accurately be able to predict changes in bacterial carbon metabolism in response to climate change. © 2010 Springer-Verlag. This research is a contribution to the Arctic Tipping Points project (www.eu-atp.org) funded by FP7 of the European Union (contract Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Kritzberg, Emma S. Duarte, Carlos M. Wassmann, Paul F. |
spellingShingle |
Kritzberg, Emma S. Duarte, Carlos M. Wassmann, Paul F. Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
author_facet |
Kritzberg, Emma S. Duarte, Carlos M. Wassmann, Paul F. |
author_sort |
Kritzberg, Emma S. |
title |
Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
title_short |
Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
title_full |
Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
title_fullStr |
Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
title_full_unstemmed |
Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature |
title_sort |
changes in arctic marine bacterial carbon metabolism in response to increasing temperature |
publisher |
Springer |
publishDate |
2010 |
url |
http://hdl.handle.net/10261/59698 https://doi.org/10.1007/s00300-010-0799-7 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Fram Strait Polar Biology |
genre_facet |
Arctic Climate change Fram Strait Polar Biology |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# 176096/S30; doi:10.1007/s00300-010-0799-7 issn: 0722-4060 Polar Biology 33: 1673- 1682 (2010) http://hdl.handle.net/10261/59698 |
op_rights |
none |
op_doi |
https://doi.org/10.1007/s00300-010-0799-7 |
container_title |
Polar Biology |
container_volume |
33 |
container_issue |
12 |
container_start_page |
1673 |
op_container_end_page |
1682 |
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1790596377893404672 |