Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord
In the frame of the European Project on Ocean Acidification (EPOCA), the response of an Arctic pelagic community (<3 mm) to a gradient of seawater p CO 2 was investigated. For this purpose 9 large-scale in situ mesocosms were deployed in Kongsfjorden, Svalbard (78°56.2´ N, 11°53.6´ E), in 2010. T...
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ftdoajarticles:oai:doaj.org/article:7fcbad0c1b124087ae2cf9c413c8cee1 2023-05-15T15:00:54+02:00 Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord S. Romac U. Riebesell J. I. Nissimov L. Bittner J. Gilbert J. La Roche A.-S. Roy H. Schunck A. Wichels G. Gerdts J. Piontek M. Sperling A. Engel 2013-01-01T00:00:00Z https://doi.org/10.5194/bg-10-181-2013 https://doaj.org/article/7fcbad0c1b124087ae2cf9c413c8cee1 EN eng Copernicus Publications http://www.biogeosciences.net/10/181/2013/bg-10-181-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-181-2013 1726-4170 1726-4189 https://doaj.org/article/7fcbad0c1b124087ae2cf9c413c8cee1 Biogeosciences, Vol 10, Iss 1, Pp 181-191 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-181-2013 2022-12-31T10:52:51Z In the frame of the European Project on Ocean Acidification (EPOCA), the response of an Arctic pelagic community (<3 mm) to a gradient of seawater p CO 2 was investigated. For this purpose 9 large-scale in situ mesocosms were deployed in Kongsfjorden, Svalbard (78°56.2´ N, 11°53.6´ E), in 2010. The present study investigates effects on the communities of particle-attached (PA; >3 μm) and free-living (FL; < 3 μm > 0.2 μm) bacteria by Automated Ribosomal Intergenic Spacer Analysis (ARISA) in 6 of the mesocosms, ranging from 185 to 1050 μatm initial p CO 2 , and the surrounding fjord. ARISA was able to resolve, on average, 27 bacterial band classes per sample and allowed for a detailed investigation of the explicit richness and diversity. Both, the PA and the FL bacterioplankton community exhibited a strong temporal development, which was driven mainly by temperature and phytoplankton development. In response to the breakdown of a picophytoplankton bloom, numbers of ARISA band classes in the PA community were reduced at low and medium CO 2 (~ 185–685 μatm) by about 25%, while they were more or less stable at high CO 2 (~ 820–1050 μatm). We hypothesise that enhanced viral lysis and enhanced availability of organic substrates at high CO 2 resulted in a more diverse PA bacterial community in the post-bloom phase. Despite lower cell numbers and extracellular enzyme activities in the post-bloom phase, bacterial protein production was enhanced in high CO 2 mesocosms, suggesting a positive effect of community richness on this function and on carbon cycling by bacteria. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Biogeosciences 10 1 181 191 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. Romac U. Riebesell J. I. Nissimov L. Bittner J. Gilbert J. La Roche A.-S. Roy H. Schunck A. Wichels G. Gerdts J. Piontek M. Sperling A. Engel Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
In the frame of the European Project on Ocean Acidification (EPOCA), the response of an Arctic pelagic community (<3 mm) to a gradient of seawater p CO 2 was investigated. For this purpose 9 large-scale in situ mesocosms were deployed in Kongsfjorden, Svalbard (78°56.2´ N, 11°53.6´ E), in 2010. The present study investigates effects on the communities of particle-attached (PA; >3 μm) and free-living (FL; < 3 μm > 0.2 μm) bacteria by Automated Ribosomal Intergenic Spacer Analysis (ARISA) in 6 of the mesocosms, ranging from 185 to 1050 μatm initial p CO 2 , and the surrounding fjord. ARISA was able to resolve, on average, 27 bacterial band classes per sample and allowed for a detailed investigation of the explicit richness and diversity. Both, the PA and the FL bacterioplankton community exhibited a strong temporal development, which was driven mainly by temperature and phytoplankton development. In response to the breakdown of a picophytoplankton bloom, numbers of ARISA band classes in the PA community were reduced at low and medium CO 2 (~ 185–685 μatm) by about 25%, while they were more or less stable at high CO 2 (~ 820–1050 μatm). We hypothesise that enhanced viral lysis and enhanced availability of organic substrates at high CO 2 resulted in a more diverse PA bacterial community in the post-bloom phase. Despite lower cell numbers and extracellular enzyme activities in the post-bloom phase, bacterial protein production was enhanced in high CO 2 mesocosms, suggesting a positive effect of community richness on this function and on carbon cycling by bacteria. |
format |
Article in Journal/Newspaper |
author |
S. Romac U. Riebesell J. I. Nissimov L. Bittner J. Gilbert J. La Roche A.-S. Roy H. Schunck A. Wichels G. Gerdts J. Piontek M. Sperling A. Engel |
author_facet |
S. Romac U. Riebesell J. I. Nissimov L. Bittner J. Gilbert J. La Roche A.-S. Roy H. Schunck A. Wichels G. Gerdts J. Piontek M. Sperling A. Engel |
author_sort |
S. Romac |
title |
Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
title_short |
Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
title_full |
Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
title_fullStr |
Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
title_full_unstemmed |
Effect of elevated CO 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an Arctic fjord |
title_sort |
effect of elevated co 2 on the dynamics of particle-attached and free-living bacterioplankton communities in an arctic fjord |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-181-2013 https://doaj.org/article/7fcbad0c1b124087ae2cf9c413c8cee1 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
op_source |
Biogeosciences, Vol 10, Iss 1, Pp 181-191 (2013) |
op_relation |
http://www.biogeosciences.net/10/181/2013/bg-10-181-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-181-2013 1726-4170 1726-4189 https://doaj.org/article/7fcbad0c1b124087ae2cf9c413c8cee1 |
op_doi |
https://doi.org/10.5194/bg-10-181-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
1 |
container_start_page |
181 |
op_container_end_page |
191 |
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1766332944572481536 |