Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions
In an experimental assessment of the potential impact of Arctic Ocean acidification on seasonal phytoplankton blooms and associated dimethyl sulfide (DMS) dynamics, we incubated water from Baffin Bay under conditions representing an acidified Arctic Ocean. Using two light regimes simulating under-ic...
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Copernicus Publications
2017
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00010156 2023-05-15T14:51:51+02:00 Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions Hussherr, Rachel Levasseur, Maurice Lizotte, Martine Tremblay, Jean-Éric Mol, Jacoba Thomas, Helmuth Gosselin, Michel Starr, Michel Miller, Lisa A. Jarniková, Tereza Schuback, Nina Mucci, Alfonso 2017-05 electronic https://doi.org/10.5194/bg-14-2407-2017 https://noa.gwlb.de/receive/cop_mods_00010156 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010113/bg-14-2407-2017.pdf https://bg.copernicus.org/articles/14/2407/2017/bg-14-2407-2017.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-2407-2017 https://noa.gwlb.de/receive/cop_mods_00010156 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010113/bg-14-2407-2017.pdf https://bg.copernicus.org/articles/14/2407/2017/bg-14-2407-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/bg-14-2407-2017 2022-02-08T22:57:12Z In an experimental assessment of the potential impact of Arctic Ocean acidification on seasonal phytoplankton blooms and associated dimethyl sulfide (DMS) dynamics, we incubated water from Baffin Bay under conditions representing an acidified Arctic Ocean. Using two light regimes simulating under-ice or subsurface chlorophyll maxima (low light; low PAR and no UVB) and ice-free (high light; high PAR + UVA + UVB) conditions, water collected at 38 m was exposed over 9 days to 6 levels of decreasing pH from 8.1 to 7.2. A phytoplankton bloom dominated by the centric diatoms Chaetoceros spp. reaching up to 7.5 µg chlorophyll a L−1 took place in all experimental bags. Total dimethylsulfoniopropionate (DMSPT) and DMS concentrations reached 155 and 19 nmol L−1, respectively. The sharp increase in DMSPT and DMS concentrations coincided with the exhaustion of NO3− in most microcosms, suggesting that nutrient stress stimulated DMS(P) synthesis by the diatom community. Under both light regimes, chlorophyll a and DMS concentrations decreased linearly with increasing proton concentration at all pH levels tested. Concentrations of DMSPT also decreased but only under high light and over a smaller pH range (from 8.1 to 7.6). In contrast to nano-phytoplankton (2–20 µm), pico-phytoplankton ( ≤ 2 µm) was stimulated by the decreasing pH. We furthermore observed no significant difference between the two light regimes tested in term of chlorophyll a, phytoplankton abundance and taxonomy, and DMSP and DMS net concentrations. These results show that ocean acidification could significantly decrease the algal biomass and inhibit DMS production during the seasonal phytoplankton bloom in the Arctic, with possible consequences for the regional climate. Article in Journal/Newspaper Arctic Arctic Ocean Arctic Ocean Acidification Baffin Bay Baffin Bay Baffin Ocean acidification Phytoplankton Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Baffin Bay Biogeosciences 14 9 2407 2427 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Hussherr, Rachel Levasseur, Maurice Lizotte, Martine Tremblay, Jean-Éric Mol, Jacoba Thomas, Helmuth Gosselin, Michel Starr, Michel Miller, Lisa A. Jarniková, Tereza Schuback, Nina Mucci, Alfonso Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
topic_facet |
article Verlagsveröffentlichung |
description |
In an experimental assessment of the potential impact of Arctic Ocean acidification on seasonal phytoplankton blooms and associated dimethyl sulfide (DMS) dynamics, we incubated water from Baffin Bay under conditions representing an acidified Arctic Ocean. Using two light regimes simulating under-ice or subsurface chlorophyll maxima (low light; low PAR and no UVB) and ice-free (high light; high PAR + UVA + UVB) conditions, water collected at 38 m was exposed over 9 days to 6 levels of decreasing pH from 8.1 to 7.2. A phytoplankton bloom dominated by the centric diatoms Chaetoceros spp. reaching up to 7.5 µg chlorophyll a L−1 took place in all experimental bags. Total dimethylsulfoniopropionate (DMSPT) and DMS concentrations reached 155 and 19 nmol L−1, respectively. The sharp increase in DMSPT and DMS concentrations coincided with the exhaustion of NO3− in most microcosms, suggesting that nutrient stress stimulated DMS(P) synthesis by the diatom community. Under both light regimes, chlorophyll a and DMS concentrations decreased linearly with increasing proton concentration at all pH levels tested. Concentrations of DMSPT also decreased but only under high light and over a smaller pH range (from 8.1 to 7.6). In contrast to nano-phytoplankton (2–20 µm), pico-phytoplankton ( ≤ 2 µm) was stimulated by the decreasing pH. We furthermore observed no significant difference between the two light regimes tested in term of chlorophyll a, phytoplankton abundance and taxonomy, and DMSP and DMS net concentrations. These results show that ocean acidification could significantly decrease the algal biomass and inhibit DMS production during the seasonal phytoplankton bloom in the Arctic, with possible consequences for the regional climate. |
format |
Article in Journal/Newspaper |
author |
Hussherr, Rachel Levasseur, Maurice Lizotte, Martine Tremblay, Jean-Éric Mol, Jacoba Thomas, Helmuth Gosselin, Michel Starr, Michel Miller, Lisa A. Jarniková, Tereza Schuback, Nina Mucci, Alfonso |
author_facet |
Hussherr, Rachel Levasseur, Maurice Lizotte, Martine Tremblay, Jean-Éric Mol, Jacoba Thomas, Helmuth Gosselin, Michel Starr, Michel Miller, Lisa A. Jarniková, Tereza Schuback, Nina Mucci, Alfonso |
author_sort |
Hussherr, Rachel |
title |
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
title_short |
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
title_full |
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
title_fullStr |
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
title_full_unstemmed |
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
title_sort |
impact of ocean acidification on arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-2407-2017 https://noa.gwlb.de/receive/cop_mods_00010156 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010113/bg-14-2407-2017.pdf https://bg.copernicus.org/articles/14/2407/2017/bg-14-2407-2017.pdf |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Ocean Arctic Ocean Acidification Baffin Bay Baffin Bay Baffin Ocean acidification Phytoplankton |
genre_facet |
Arctic Arctic Ocean Arctic Ocean Acidification Baffin Bay Baffin Bay Baffin Ocean acidification Phytoplankton |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-2407-2017 https://noa.gwlb.de/receive/cop_mods_00010156 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010113/bg-14-2407-2017.pdf https://bg.copernicus.org/articles/14/2407/2017/bg-14-2407-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-2407-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
9 |
container_start_page |
2407 |
op_container_end_page |
2427 |
_version_ |
1766323005038788608 |