Arctic microbial community dynamics influenced by elevated CO2 levels
The Arctic Ocean ecosystem is particularly vulnerable to ocean acidification (OA) related alterations due to the relatively high CO 2 solubility and low carbonate saturation states of its cold surface waters. Thus far, however, there is only little known about the consequences of OA on the base of t...
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ftcopernicus:oai:publications.copernicus.org:bg16663 2023-05-15T14:44:35+02:00 Arctic microbial community dynamics influenced by elevated CO2 levels Brussaard, C. P. D. Noordeloos, A. A. M. Witte, H. Collenteur, M. C. J. Schulz, K. Ludwig, A. Riebesell, U. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-10-719-2013 https://www.biogeosciences.net/10/719/2013/ eng eng info:eu-repo/grantAgreement/EC/FP7/211384 doi:10.5194/bg-10-719-2013 https://www.biogeosciences.net/10/719/2013/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/bg-10-719-2013 2019-12-24T09:55:35Z The Arctic Ocean ecosystem is particularly vulnerable to ocean acidification (OA) related alterations due to the relatively high CO 2 solubility and low carbonate saturation states of its cold surface waters. Thus far, however, there is only little known about the consequences of OA on the base of the food web. In a mesocosm CO 2 -enrichment experiment (overall CO 2 levels ranged from ~ 180 to 1100 μatm) in Kongsfjorden off Svalbard, we studied the consequences of OA on a natural pelagic microbial community. OA distinctly affected the composition and growth of the Arctic phytoplankton community, i.e. the picoeukaryotic photoautotrophs and to a lesser extent the nanophytoplankton thrived. A shift towards the smallest phytoplankton as a result of OA will have direct consequences for the structure and functioning of the pelagic food web and thus for the biogeochemical cycles. Besides being grazed, the dominant pico- and nanophytoplankton groups were found prone to viral lysis, thereby shunting the carbon accumulation in living organisms into the dissolved pools of organic carbon and subsequently affecting the efficiency of the biological pump in these Arctic waters. Other/Unknown Material Arctic Arctic Ocean Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard Copernicus Publications: E-Journals Arctic Arctic Ocean Svalbard Biogeosciences 10 2 719 731 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The Arctic Ocean ecosystem is particularly vulnerable to ocean acidification (OA) related alterations due to the relatively high CO 2 solubility and low carbonate saturation states of its cold surface waters. Thus far, however, there is only little known about the consequences of OA on the base of the food web. In a mesocosm CO 2 -enrichment experiment (overall CO 2 levels ranged from ~ 180 to 1100 μatm) in Kongsfjorden off Svalbard, we studied the consequences of OA on a natural pelagic microbial community. OA distinctly affected the composition and growth of the Arctic phytoplankton community, i.e. the picoeukaryotic photoautotrophs and to a lesser extent the nanophytoplankton thrived. A shift towards the smallest phytoplankton as a result of OA will have direct consequences for the structure and functioning of the pelagic food web and thus for the biogeochemical cycles. Besides being grazed, the dominant pico- and nanophytoplankton groups were found prone to viral lysis, thereby shunting the carbon accumulation in living organisms into the dissolved pools of organic carbon and subsequently affecting the efficiency of the biological pump in these Arctic waters. |
format |
Other/Unknown Material |
author |
Brussaard, C. P. D. Noordeloos, A. A. M. Witte, H. Collenteur, M. C. J. Schulz, K. Ludwig, A. Riebesell, U. |
spellingShingle |
Brussaard, C. P. D. Noordeloos, A. A. M. Witte, H. Collenteur, M. C. J. Schulz, K. Ludwig, A. Riebesell, U. Arctic microbial community dynamics influenced by elevated CO2 levels |
author_facet |
Brussaard, C. P. D. Noordeloos, A. A. M. Witte, H. Collenteur, M. C. J. Schulz, K. Ludwig, A. Riebesell, U. |
author_sort |
Brussaard, C. P. D. |
title |
Arctic microbial community dynamics influenced by elevated CO2 levels |
title_short |
Arctic microbial community dynamics influenced by elevated CO2 levels |
title_full |
Arctic microbial community dynamics influenced by elevated CO2 levels |
title_fullStr |
Arctic microbial community dynamics influenced by elevated CO2 levels |
title_full_unstemmed |
Arctic microbial community dynamics influenced by elevated CO2 levels |
title_sort |
arctic microbial community dynamics influenced by elevated co2 levels |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-10-719-2013 https://www.biogeosciences.net/10/719/2013/ |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Ocean Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
genre_facet |
Arctic Arctic Ocean Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
op_source |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/211384 doi:10.5194/bg-10-719-2013 https://www.biogeosciences.net/10/719/2013/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-10-719-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
2 |
container_start_page |
719 |
op_container_end_page |
731 |
_version_ |
1766316073323331584 |