Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients
The extracellular release of dissolved organic carbon (DOC) by phytoplankton is a potentially important source of labile organic carbon for bacterioplankton in pelagic ecosystems. In the context of increasing seawater partial pressure of CO 2 (pCO 2 ), via the oceanic absorption of elevated atmosphe...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Language: | English |
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2016
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ftuhipublicatio:oai:pure.atira.dk:publications/dc5f7000-2da8-4980-9a58-b5064c112a8a 2024-01-28T10:02:25+01:00 Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients Poulton, Alex J. Daniels, Chris J. Esposito, Mario Humphreys, Matthew P. Mitchell, Elaine Ribas-Ribas, Mariana Russell, Benjamin C. Stinchcombe, Mark C. Tynan, Eithne Richier, Sophie 2016-05-01 https://pure.uhi.ac.uk/en/publications/dc5f7000-2da8-4980-9a58-b5064c112a8a https://doi.org/10.1016/j.dsr2.2016.01.002 http://www.scopus.com/inward/record.url?scp=84955604335&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84955604335&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Poulton , A J , Daniels , C J , Esposito , M , Humphreys , M P , Mitchell , E , Ribas-Ribas , M , Russell , B C , Stinchcombe , M C , Tynan , E & Richier , S 2016 , ' Production of dissolved organic carbon by Arctic plankton communities : Responses to elevated carbon dioxide and the availability of light and nutrients ' , Deep-Sea Research Part II: Topical Studies in Oceanography , vol. 127 , pp. 60-74 . https://doi.org/10.1016/j.dsr2.2016.01.002 Arctic Ocean Bacteria Diatoms Dissolved organic carbon Ocean acidification Phytoplankton article 2016 ftuhipublicatio https://doi.org/10.1016/j.dsr2.2016.01.002 2024-01-04T23:21:43Z The extracellular release of dissolved organic carbon (DOC) by phytoplankton is a potentially important source of labile organic carbon for bacterioplankton in pelagic ecosystems. In the context of increasing seawater partial pressure of CO 2 (pCO 2 ), via the oceanic absorption of elevated atmospheric CO 2 (ocean acidification), several previous studies have reported increases to the relative amount of carbon fixed into particulates, via primary production (PP), and dissolved phases (DOC). During the summer of 2012 we measured DOC production by phytoplankton communities in the Nordic seas of the Arctic Ocean (Greenland, Norwegian and Barents Sea) from both in situ sampling and during three bioassay experiments where pCO 2 levels (targets ~550 μatm, ~750 μatm, ~1000 μatm) were elevated relative to ambient conditions. Measurements of DOC production and PP came from 24 h incubations and therefore represent net DOC production rates, where an unknown portion of the DOC released has potentially been utilised by heterotrophic organisms. Production of DOC (net pDOC) by in situ communities varied from 0.09 to 0.64 mmol C m -3 d -1 (average 0.25 mmol C m -3 d -1 ), with comparative rates in two of the experimental bioassays (0.04-1.23 mmol C m -3 d -1 ) and increasing dramatically in the third (up to 5.88 mmol C m -3 d -1 ). When expressed as a fraction of total carbon fixation (i.e., PP plus pDOC), percentage extracellular release (PER) was 14% on average (range 2-46%) for in situ measurements, with PER in the three bioassays having a very similar range (2-50%). A marked increase in pDOC (and PER) was only observed in one of the bioassays where nutrient levels (nitrate, silicic acid) dropped dramatically relative to starting (ambient) concentrations; no pCO 2 treatment effect on pDOC (or PER) was evident across the three experiments. Examination of in situ net pDOC (and PER) found significant correlations with decreasing silicic acid and increasing euphotic zone depth, indicating that nutrient and light availability ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Greenland Nordic Seas Ocean acidification Phytoplankton University of the Highlands and Islands: Research Database of UHI Arctic Arctic Ocean Barents Sea Greenland Deep Sea Research Part II: Topical Studies in Oceanography 127 60 74 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
Arctic Ocean Bacteria Diatoms Dissolved organic carbon Ocean acidification Phytoplankton |
spellingShingle |
Arctic Ocean Bacteria Diatoms Dissolved organic carbon Ocean acidification Phytoplankton Poulton, Alex J. Daniels, Chris J. Esposito, Mario Humphreys, Matthew P. Mitchell, Elaine Ribas-Ribas, Mariana Russell, Benjamin C. Stinchcombe, Mark C. Tynan, Eithne Richier, Sophie Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
topic_facet |
Arctic Ocean Bacteria Diatoms Dissolved organic carbon Ocean acidification Phytoplankton |
description |
The extracellular release of dissolved organic carbon (DOC) by phytoplankton is a potentially important source of labile organic carbon for bacterioplankton in pelagic ecosystems. In the context of increasing seawater partial pressure of CO 2 (pCO 2 ), via the oceanic absorption of elevated atmospheric CO 2 (ocean acidification), several previous studies have reported increases to the relative amount of carbon fixed into particulates, via primary production (PP), and dissolved phases (DOC). During the summer of 2012 we measured DOC production by phytoplankton communities in the Nordic seas of the Arctic Ocean (Greenland, Norwegian and Barents Sea) from both in situ sampling and during three bioassay experiments where pCO 2 levels (targets ~550 μatm, ~750 μatm, ~1000 μatm) were elevated relative to ambient conditions. Measurements of DOC production and PP came from 24 h incubations and therefore represent net DOC production rates, where an unknown portion of the DOC released has potentially been utilised by heterotrophic organisms. Production of DOC (net pDOC) by in situ communities varied from 0.09 to 0.64 mmol C m -3 d -1 (average 0.25 mmol C m -3 d -1 ), with comparative rates in two of the experimental bioassays (0.04-1.23 mmol C m -3 d -1 ) and increasing dramatically in the third (up to 5.88 mmol C m -3 d -1 ). When expressed as a fraction of total carbon fixation (i.e., PP plus pDOC), percentage extracellular release (PER) was 14% on average (range 2-46%) for in situ measurements, with PER in the three bioassays having a very similar range (2-50%). A marked increase in pDOC (and PER) was only observed in one of the bioassays where nutrient levels (nitrate, silicic acid) dropped dramatically relative to starting (ambient) concentrations; no pCO 2 treatment effect on pDOC (or PER) was evident across the three experiments. Examination of in situ net pDOC (and PER) found significant correlations with decreasing silicic acid and increasing euphotic zone depth, indicating that nutrient and light availability ... |
format |
Article in Journal/Newspaper |
author |
Poulton, Alex J. Daniels, Chris J. Esposito, Mario Humphreys, Matthew P. Mitchell, Elaine Ribas-Ribas, Mariana Russell, Benjamin C. Stinchcombe, Mark C. Tynan, Eithne Richier, Sophie |
author_facet |
Poulton, Alex J. Daniels, Chris J. Esposito, Mario Humphreys, Matthew P. Mitchell, Elaine Ribas-Ribas, Mariana Russell, Benjamin C. Stinchcombe, Mark C. Tynan, Eithne Richier, Sophie |
author_sort |
Poulton, Alex J. |
title |
Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
title_short |
Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
title_full |
Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
title_fullStr |
Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
title_full_unstemmed |
Production of dissolved organic carbon by Arctic plankton communities:Responses to elevated carbon dioxide and the availability of light and nutrients |
title_sort |
production of dissolved organic carbon by arctic plankton communities:responses to elevated carbon dioxide and the availability of light and nutrients |
publishDate |
2016 |
url |
https://pure.uhi.ac.uk/en/publications/dc5f7000-2da8-4980-9a58-b5064c112a8a https://doi.org/10.1016/j.dsr2.2016.01.002 http://www.scopus.com/inward/record.url?scp=84955604335&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84955604335&partnerID=8YFLogxK |
geographic |
Arctic Arctic Ocean Barents Sea Greenland |
geographic_facet |
Arctic Arctic Ocean Barents Sea Greenland |
genre |
Arctic Arctic Arctic Ocean Barents Sea Greenland Nordic Seas Ocean acidification Phytoplankton |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Greenland Nordic Seas Ocean acidification Phytoplankton |
op_source |
Poulton , A J , Daniels , C J , Esposito , M , Humphreys , M P , Mitchell , E , Ribas-Ribas , M , Russell , B C , Stinchcombe , M C , Tynan , E & Richier , S 2016 , ' Production of dissolved organic carbon by Arctic plankton communities : Responses to elevated carbon dioxide and the availability of light and nutrients ' , Deep-Sea Research Part II: Topical Studies in Oceanography , vol. 127 , pp. 60-74 . https://doi.org/10.1016/j.dsr2.2016.01.002 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2016.01.002 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
127 |
container_start_page |
60 |
op_container_end_page |
74 |
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1789327803059011584 |