ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean
Abstract During the last few years, extensive sea ice melting in the Arctic due to climate change has been detected, which could potentially modify the organic carbon fluxes in these waters. In this study, the effect of sea ice melting on bacterial carbon channelling by phages and protists has been...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.661.6207 2023-05-15T14:50:21+02:00 ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean Susana Agustı Carlos M. Duarte The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.661.6207 http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.661.6207 http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf text ftciteseerx 2016-01-08T16:54:13Z Abstract During the last few years, extensive sea ice melting in the Arctic due to climate change has been detected, which could potentially modify the organic carbon fluxes in these waters. In this study, the effect of sea ice melting on bacterial carbon channelling by phages and protists has been evaluated in the northern Greenland Sea and Arctic Ocean. Grazing on bacteria by protists was evaluated using the FLB disappearance method. Lysis of bacteria due to viral infections was measured using the virus reduction approach. Losses of bacterial production caused by protists (PMMBP) dominated losses caused by viruses (VMMBP) throughout the study. Lysogenic viral production was detected in 7 out of 21 measurements and constituted from 33.9 to 100.0 % of the total viral produc-tion. Significantly higher PMMBP and lower VMMBP were detected in waters affected by ice melting compared with unaffected waters. Consequently, significantly more bacterial carbon was channelled to the higher trophic levels in affected waters (13.05 ± 5.98 lgC l-1 day-1) than in unaffected waters (8.91 ± 8.33 lgC l-1 day-1). Viruses channelled 2.63 ± 2.45 lgC l-1 day-1 in affected waters and 4.27 ± 5.54 lgC l-1 day-1 in unaffected waters. We conclude that sea ice melting in the Arctic could modify the carbon flow through the microbial food web. This process may be especially important in the case of massive sea ice melting due to climate change. Text Arctic Arctic Ocean Climate change Greenland Greenland Sea Sea ice Unknown Arctic Arctic Ocean Greenland |
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Abstract During the last few years, extensive sea ice melting in the Arctic due to climate change has been detected, which could potentially modify the organic carbon fluxes in these waters. In this study, the effect of sea ice melting on bacterial carbon channelling by phages and protists has been evaluated in the northern Greenland Sea and Arctic Ocean. Grazing on bacteria by protists was evaluated using the FLB disappearance method. Lysis of bacteria due to viral infections was measured using the virus reduction approach. Losses of bacterial production caused by protists (PMMBP) dominated losses caused by viruses (VMMBP) throughout the study. Lysogenic viral production was detected in 7 out of 21 measurements and constituted from 33.9 to 100.0 % of the total viral produc-tion. Significantly higher PMMBP and lower VMMBP were detected in waters affected by ice melting compared with unaffected waters. Consequently, significantly more bacterial carbon was channelled to the higher trophic levels in affected waters (13.05 ± 5.98 lgC l-1 day-1) than in unaffected waters (8.91 ± 8.33 lgC l-1 day-1). Viruses channelled 2.63 ± 2.45 lgC l-1 day-1 in affected waters and 4.27 ± 5.54 lgC l-1 day-1 in unaffected waters. We conclude that sea ice melting in the Arctic could modify the carbon flow through the microbial food web. This process may be especially important in the case of massive sea ice melting due to climate change. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Susana Agustı Carlos M. Duarte |
spellingShingle |
Susana Agustı Carlos M. Duarte ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
author_facet |
Susana Agustı Carlos M. Duarte |
author_sort |
Susana Agustı |
title |
ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
title_short |
ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
title_full |
ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
title_fullStr |
ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
title_full_unstemmed |
ORIGINAL PAPER Effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the Arctic Ocean |
title_sort |
original paper effect of ice melting on bacterial carbon fluxes channelled by viruses and protists in the arctic ocean |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.661.6207 http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Climate change Greenland Greenland Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Greenland Greenland Sea Sea ice |
op_source |
http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.661.6207 http://www.imedea.uib-csic.es/%7Etxetxu/Publications/Boras_2010_Effect.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766321395123355648 |