Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels
A large-scale multidisciplinary mesocosm experiment in an Arctic fjord (Kongsfjorden, Svalbard; 78°56.2′N) was used to study Arctic marine food webs and biogeochemical elements cycling at natural and elevated future carbon dioxide (CO2) levels. At the start of the experiment, marine-derived chromoph...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | https://hdl.handle.net/10037/26502 https://doi.org/10.1002/2013JG002587 |
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ftunivtroemsoe:oai:munin.uit.no:10037/26502 2023-05-15T14:27:25+02:00 Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels Pavlov, Alexey K. Silyakova, Anna Granskog, Mats A. Bellerby, Richard Engel, Anja Schulz, Kai G. Brussaard, Corina P. D. 2014-05-22 https://hdl.handle.net/10037/26502 https://doi.org/10.1002/2013JG002587 eng eng American Geophysical Union (AGU) Journal of Geophysical Research (JGR): Biogeosciences Norges forskningsråd: 223259 Norges forskningsråd: 184860 info:eu-repo/grantAgreement/EC/FP7/211384/EU/European Project on Ocean Acidification/EPOCA/ Pavlov, Silyakova A, Granskog MA, Bellerby R, Engel A, Schulz KG, Brussaard CPD. Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels. Journal of Geophysical Research (JGR): Biogeosciences. 2014;119(6):1216-1230 FRIDAID 1176440 doi:10.1002/2013JG002587 2169-8953 2169-8961 https://hdl.handle.net/10037/26502 openAccess Copyright 2014 AGU Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2014 ftunivtroemsoe https://doi.org/10.1002/2013JG002587 2022-08-31T23:00:14Z A large-scale multidisciplinary mesocosm experiment in an Arctic fjord (Kongsfjorden, Svalbard; 78°56.2′N) was used to study Arctic marine food webs and biogeochemical elements cycling at natural and elevated future carbon dioxide (CO2) levels. At the start of the experiment, marine-derived chromophoric dissolved organic matter (CDOM) dominated the CDOM pool. Thus, this experiment constituted a convenient case to study production of autochthonous CDOM, which is typically masked by high levels of CDOM of terrestrial origin in the Arctic Ocean proper. CDOM accumulated during the experiment in line with an increase in bacterial abundance; however, no response was observed to increased pCO 2 levels. Changes in CDOM absorption spectral slopes indicate that bacteria were most likely responsible for the observed CDOM dynamics. Distinct absorption peaks (at ~ 330 and ~ 360 nm) were likely associated with mycosporine-like amino acids (MAAs). Due to the experimental setup, MAAs were produced in absence of ultraviolet exposure providing evidence for MAAs to be considered as multipurpose metabolites rather than simple photoprotective compounds. We showed that a small increase in CDOM during the experiment made it a major contributor to total absorption in a range of photosynthetically active radiation (PAR, 400–700 nm) and, therefore, is important for spectral light availability and may be important for photosynthesis and phytoplankton groups composition in a rapidly changing Arctic marine ecosystem. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Kongsfjord* Kongsfjorden Phytoplankton Svalbard University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Svalbard Journal of Geophysical Research: Biogeosciences 119 6 1216 1230 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
A large-scale multidisciplinary mesocosm experiment in an Arctic fjord (Kongsfjorden, Svalbard; 78°56.2′N) was used to study Arctic marine food webs and biogeochemical elements cycling at natural and elevated future carbon dioxide (CO2) levels. At the start of the experiment, marine-derived chromophoric dissolved organic matter (CDOM) dominated the CDOM pool. Thus, this experiment constituted a convenient case to study production of autochthonous CDOM, which is typically masked by high levels of CDOM of terrestrial origin in the Arctic Ocean proper. CDOM accumulated during the experiment in line with an increase in bacterial abundance; however, no response was observed to increased pCO 2 levels. Changes in CDOM absorption spectral slopes indicate that bacteria were most likely responsible for the observed CDOM dynamics. Distinct absorption peaks (at ~ 330 and ~ 360 nm) were likely associated with mycosporine-like amino acids (MAAs). Due to the experimental setup, MAAs were produced in absence of ultraviolet exposure providing evidence for MAAs to be considered as multipurpose metabolites rather than simple photoprotective compounds. We showed that a small increase in CDOM during the experiment made it a major contributor to total absorption in a range of photosynthetically active radiation (PAR, 400–700 nm) and, therefore, is important for spectral light availability and may be important for photosynthesis and phytoplankton groups composition in a rapidly changing Arctic marine ecosystem. |
format |
Article in Journal/Newspaper |
author |
Pavlov, Alexey K. Silyakova, Anna Granskog, Mats A. Bellerby, Richard Engel, Anja Schulz, Kai G. Brussaard, Corina P. D. |
spellingShingle |
Pavlov, Alexey K. Silyakova, Anna Granskog, Mats A. Bellerby, Richard Engel, Anja Schulz, Kai G. Brussaard, Corina P. D. Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
author_facet |
Pavlov, Alexey K. Silyakova, Anna Granskog, Mats A. Bellerby, Richard Engel, Anja Schulz, Kai G. Brussaard, Corina P. D. |
author_sort |
Pavlov, Alexey K. |
title |
Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
title_short |
Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
title_full |
Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
title_fullStr |
Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
title_full_unstemmed |
Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels |
title_sort |
marine cdom accumulation during a coastal arctic mesocosm experiment: no response to elevated pco2 levels |
publisher |
American Geophysical Union (AGU) |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/26502 https://doi.org/10.1002/2013JG002587 |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Arctic Ocean Kongsfjord* Kongsfjorden Phytoplankton Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Kongsfjord* Kongsfjorden Phytoplankton Svalbard |
op_relation |
Journal of Geophysical Research (JGR): Biogeosciences Norges forskningsråd: 223259 Norges forskningsråd: 184860 info:eu-repo/grantAgreement/EC/FP7/211384/EU/European Project on Ocean Acidification/EPOCA/ Pavlov, Silyakova A, Granskog MA, Bellerby R, Engel A, Schulz KG, Brussaard CPD. Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels. Journal of Geophysical Research (JGR): Biogeosciences. 2014;119(6):1216-1230 FRIDAID 1176440 doi:10.1002/2013JG002587 2169-8953 2169-8961 https://hdl.handle.net/10037/26502 |
op_rights |
openAccess Copyright 2014 AGU |
op_doi |
https://doi.org/10.1002/2013JG002587 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
119 |
container_issue |
6 |
container_start_page |
1216 |
op_container_end_page |
1230 |
_version_ |
1766301159023181824 |