Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord
Net community production (NCP) and carbon to nutrient uptake ratios were studied during a large-scale mesocosm experiment on ocean acidification in Kongsfjorden, western Svalbard, during June–July 2010. Nutrient depleted fjord water with natural plankton assemblages, enclosed in nine mesocosms of ~...
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Online Access: | http://hdl.handle.net/11250/193242 https://doi.org/10.5194/bg-10-4847-2013 |
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ftnorskinstvf:oai:niva.brage.unit.no:11250/193242 2023-05-15T14:26:53+02:00 Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord Silyakova, Anna Bellerby, Richard Schulz, Kai G. Czerny, Jan Tanaka, Tsuneo Nondal, Gisle Riebesell, Ulf Engel, Anja De Lange, Tor Ludvig, Andrea 2014-02-16T10:04:37Z application/pdf http://hdl.handle.net/11250/193242 https://doi.org/10.5194/bg-10-4847-2013 eng eng http://www.biogeosciences.net/10/4847/2013/bg-10-4847-2013.pdf Silyakova, A.,Bellerby, R.,Schulz, K.G., et al., 2013. Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord. Biogeosciences 10(7):4847-4859 http://dx.doi.org/10.5194/bg-10-4847-2013 urn:issn:1726-4170 http://hdl.handle.net/11250/193242 https://doi.org/10.5194/bg-10-4847-2013 cristin:1052743 http://creativecommons.org/licenses/by/3.0/ https://creativecommons.org/licenses/by/3.0/ © Author(s) 2013 CC-BY 4847-4859 10 Biogeosciences 7 VDP::Matematikk og Naturvitenskap: 400 VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Journal article Peer reviewed 2014 ftnorskinstvf https://doi.org/10.5194/bg-10-4847-2013 2023-02-21T08:45:13Z Net community production (NCP) and carbon to nutrient uptake ratios were studied during a large-scale mesocosm experiment on ocean acidification in Kongsfjorden, western Svalbard, during June–July 2010. Nutrient depleted fjord water with natural plankton assemblages, enclosed in nine mesocosms of ~ 50 m3 in volume, was exposed to pCO2 levels ranging initially from 185 to 1420 μatm. NCP estimations are the cumulative change in dissolved inorganic carbon concentrations after accounting for gas exchange and total alkalinity variations. Stoichiometric coupling between inorganic carbon and nutrient net uptake is shown as a ratio of NCP to a cumulative change in inorganic nutrients. Phytoplankton growth was stimulated by nutrient addition half way through the experiment and three distinct peaks in chlorophyll a concentration were observed during the experiment. Accordingly, the experiment was divided in three phases. Cumulative NCP was similar in all mesocosms over the duration of the experiment. However, in phases I and II, NCP was higher and in phase III lower at elevated pCO2. Due to relatively low inorganic nutrient concentration in phase I, C : N and C : P uptake ratios were calculated only for the period after nutrient addition (phase II and phase III). For the total post-nutrient period (phase II + phase III) ratios were close to Redfield, however they were lower in phase II and higher in phase III. Variability of NCP, C : N and C : P uptake ratios in different phases reflects the effect of increasing CO2 on phytoplankton community composition and succession. The phytoplankton community was composed predominantly of haptophytes in phase I, prasinophytes, dinoflagellates, and cryptophytes in phase II, and haptophytes, prasinophytes, dinoflagellates and chlorophytes in phase III (Schulz et al., 2013). Increasing ambient inorganic carbon concentrations have also been shown to promote primary production and carbon assimilation. For this study, it is clear that the pelagic ecosystem response to increasing CO2 is ... Article in Journal/Newspaper Arctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Arctic Svalbard Biogeosciences 10 7 4847 4859 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400 VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400 VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Silyakova, Anna Bellerby, Richard Schulz, Kai G. Czerny, Jan Tanaka, Tsuneo Nondal, Gisle Riebesell, Ulf Engel, Anja De Lange, Tor Ludvig, Andrea Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400 VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 |
description |
Net community production (NCP) and carbon to nutrient uptake ratios were studied during a large-scale mesocosm experiment on ocean acidification in Kongsfjorden, western Svalbard, during June–July 2010. Nutrient depleted fjord water with natural plankton assemblages, enclosed in nine mesocosms of ~ 50 m3 in volume, was exposed to pCO2 levels ranging initially from 185 to 1420 μatm. NCP estimations are the cumulative change in dissolved inorganic carbon concentrations after accounting for gas exchange and total alkalinity variations. Stoichiometric coupling between inorganic carbon and nutrient net uptake is shown as a ratio of NCP to a cumulative change in inorganic nutrients. Phytoplankton growth was stimulated by nutrient addition half way through the experiment and three distinct peaks in chlorophyll a concentration were observed during the experiment. Accordingly, the experiment was divided in three phases. Cumulative NCP was similar in all mesocosms over the duration of the experiment. However, in phases I and II, NCP was higher and in phase III lower at elevated pCO2. Due to relatively low inorganic nutrient concentration in phase I, C : N and C : P uptake ratios were calculated only for the period after nutrient addition (phase II and phase III). For the total post-nutrient period (phase II + phase III) ratios were close to Redfield, however they were lower in phase II and higher in phase III. Variability of NCP, C : N and C : P uptake ratios in different phases reflects the effect of increasing CO2 on phytoplankton community composition and succession. The phytoplankton community was composed predominantly of haptophytes in phase I, prasinophytes, dinoflagellates, and cryptophytes in phase II, and haptophytes, prasinophytes, dinoflagellates and chlorophytes in phase III (Schulz et al., 2013). Increasing ambient inorganic carbon concentrations have also been shown to promote primary production and carbon assimilation. For this study, it is clear that the pelagic ecosystem response to increasing CO2 is ... |
format |
Article in Journal/Newspaper |
author |
Silyakova, Anna Bellerby, Richard Schulz, Kai G. Czerny, Jan Tanaka, Tsuneo Nondal, Gisle Riebesell, Ulf Engel, Anja De Lange, Tor Ludvig, Andrea |
author_facet |
Silyakova, Anna Bellerby, Richard Schulz, Kai G. Czerny, Jan Tanaka, Tsuneo Nondal, Gisle Riebesell, Ulf Engel, Anja De Lange, Tor Ludvig, Andrea |
author_sort |
Silyakova, Anna |
title |
Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
title_short |
Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
title_full |
Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
title_fullStr |
Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
title_full_unstemmed |
Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord |
title_sort |
pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an arctic fjord |
publishDate |
2014 |
url |
http://hdl.handle.net/11250/193242 https://doi.org/10.5194/bg-10-4847-2013 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
genre_facet |
Arctic Arctic Kongsfjord* Kongsfjorden Ocean acidification Phytoplankton Svalbard |
op_source |
4847-4859 10 Biogeosciences 7 |
op_relation |
http://www.biogeosciences.net/10/4847/2013/bg-10-4847-2013.pdf Silyakova, A.,Bellerby, R.,Schulz, K.G., et al., 2013. Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord. Biogeosciences 10(7):4847-4859 http://dx.doi.org/10.5194/bg-10-4847-2013 urn:issn:1726-4170 http://hdl.handle.net/11250/193242 https://doi.org/10.5194/bg-10-4847-2013 cristin:1052743 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ https://creativecommons.org/licenses/by/3.0/ © Author(s) 2013 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-10-4847-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
7 |
container_start_page |
4847 |
op_container_end_page |
4859 |
_version_ |
1766300346184892416 |