A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels
The effect of CO2 on carbon fluxes (production, consumption, and export) in Arctic plankton communities was investigated during the 2010 EPOCA (European project on Ocean Acidification) mesocosm study off Ny Ålesund, Svalbard. 13C labelled bicarbonate was added to nine mesocosms with a range in pCO2...
Published in: | Biogeosciences |
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Online Access: | https://epubs.scu.edu.au/esm_pubs/1671 https://doi.org/10.5194/bg-10-1425-2013 |
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ftsoutherncu:oai:epubs.scu.edu.au:esm_pubs-2684 2023-05-15T14:59:18+02:00 A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels de Kluijver, A Soetaert, K Czerny, J Schulz, Kai G Boxhammer, T Riebesell, U Middelburg, J J 2013-01-01T08:00:00Z https://epubs.scu.edu.au/esm_pubs/1671 https://doi.org/10.5194/bg-10-1425-2013 unknown ePublications@SCU School of Environment, Science and Engineering Papers Environmental Sciences article 2013 ftsoutherncu https://doi.org/10.5194/bg-10-1425-2013 2019-08-06T12:55:44Z The effect of CO2 on carbon fluxes (production, consumption, and export) in Arctic plankton communities was investigated during the 2010 EPOCA (European project on Ocean Acidification) mesocosm study off Ny Ålesund, Svalbard. 13C labelled bicarbonate was added to nine mesocosms with a range in pCO2 (185 to 1420 μatm) to follow the transfer of carbon from dissolved inorganic carbon (DIC) into phytoplankton, bacterial and zooplankton consumers, and export. A nutrient–phytoplankton–zooplankton–detritus model amended with 13C dynamics was constructed and fitted to the data to quantify uptake rates and carbon fluxes in the plankton community. The plankton community structure was characteristic for a post-bloom situation and retention food web and showed high bacterial production (∼31% of primary production), high abundance of mixotrophic phytoplankton, low mesozooplankton grazing (∼6% of primary production) and low export (∼7% of primary production). Zooplankton grazing and export of detritus were sensitive to CO2: grazing decreased and export increased with increasing pCO2. Nutrient addition halfway through the experiment increased the export, but not the production rates. Although mixotrophs showed initially higher production rates with increasing CO2, the overall production of POC (particulate organic carbon) after nutrient addition decreased with increasing CO2. Interestingly, and contrary to the low nutrient situation, much more material settled down in the sediment traps at low CO2. The observed CO2 related effects potentially alter future organic carbon flows and export, with possible consequences for the efficiency of the biological pump. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Ocean acidification Phytoplankton Svalbard Zooplankton Southern Cross University: epublications@SCU Arctic Svalbard Ny-Ålesund Biogeosciences 10 3 1425 1440 |
institution |
Open Polar |
collection |
Southern Cross University: epublications@SCU |
op_collection_id |
ftsoutherncu |
language |
unknown |
topic |
Environmental Sciences |
spellingShingle |
Environmental Sciences de Kluijver, A Soetaert, K Czerny, J Schulz, Kai G Boxhammer, T Riebesell, U Middelburg, J J A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
topic_facet |
Environmental Sciences |
description |
The effect of CO2 on carbon fluxes (production, consumption, and export) in Arctic plankton communities was investigated during the 2010 EPOCA (European project on Ocean Acidification) mesocosm study off Ny Ålesund, Svalbard. 13C labelled bicarbonate was added to nine mesocosms with a range in pCO2 (185 to 1420 μatm) to follow the transfer of carbon from dissolved inorganic carbon (DIC) into phytoplankton, bacterial and zooplankton consumers, and export. A nutrient–phytoplankton–zooplankton–detritus model amended with 13C dynamics was constructed and fitted to the data to quantify uptake rates and carbon fluxes in the plankton community. The plankton community structure was characteristic for a post-bloom situation and retention food web and showed high bacterial production (∼31% of primary production), high abundance of mixotrophic phytoplankton, low mesozooplankton grazing (∼6% of primary production) and low export (∼7% of primary production). Zooplankton grazing and export of detritus were sensitive to CO2: grazing decreased and export increased with increasing pCO2. Nutrient addition halfway through the experiment increased the export, but not the production rates. Although mixotrophs showed initially higher production rates with increasing CO2, the overall production of POC (particulate organic carbon) after nutrient addition decreased with increasing CO2. Interestingly, and contrary to the low nutrient situation, much more material settled down in the sediment traps at low CO2. The observed CO2 related effects potentially alter future organic carbon flows and export, with possible consequences for the efficiency of the biological pump. |
format |
Article in Journal/Newspaper |
author |
de Kluijver, A Soetaert, K Czerny, J Schulz, Kai G Boxhammer, T Riebesell, U Middelburg, J J |
author_facet |
de Kluijver, A Soetaert, K Czerny, J Schulz, Kai G Boxhammer, T Riebesell, U Middelburg, J J |
author_sort |
de Kluijver, A |
title |
A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
title_short |
A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
title_full |
A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
title_fullStr |
A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
title_full_unstemmed |
A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels |
title_sort |
13c labelling study on carbon fluxes in arctic plankton communities under elevated co2 levels |
publisher |
ePublications@SCU |
publishDate |
2013 |
url |
https://epubs.scu.edu.au/esm_pubs/1671 https://doi.org/10.5194/bg-10-1425-2013 |
geographic |
Arctic Svalbard Ny-Ålesund |
geographic_facet |
Arctic Svalbard Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund Ocean acidification Phytoplankton Svalbard Zooplankton |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Ocean acidification Phytoplankton Svalbard Zooplankton |
op_source |
School of Environment, Science and Engineering Papers |
op_doi |
https://doi.org/10.5194/bg-10-1425-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
1425 |
op_container_end_page |
1440 |
_version_ |
1766331404154568704 |