Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula
We studied CO 2 and O 2 dynamics in the western Antarctic Peninsula (WAP) waters in relation to (1) phytoplankton biomass, (2) microbial community primary production and respiration, and (3), for the first time, phytoplankton composition, during summer and fall in 3 consecutive years (2002, 2003 and...
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Language: | English |
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Online Access: | http://hdl.handle.net/2078/122130 https://doi.org/10.3354/meps09466 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:122130 2024-05-12T07:53:15+00:00 Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula Moreau, Sébastien Schloss, Irène Mostajir, Behzad Demers, Serge Almandoz, Gastón O. Ferrario, Martha E. Ferreyra, Gustavo A. UCL - SST/ELI - Earth and Life Institute Université du Québec - Institut des Sciences de la Mer 2012 http://hdl.handle.net/2078/122130 https://doi.org/10.3354/meps09466 eng eng boreal:122130 http://hdl.handle.net/2078/122130 doi:10.3354/meps09466 urn:ISSN:0171-8630 info:eu-repo/semantics/restrictedAccess Marine Ecology Progress Series, Vol. 446, no.1, p. 45-59 (2012) CO 2 sources Primary production CO2 sinks Community respiration Phytoplankton biomass Phytoplankton composition info:eu-repo/semantics/article 2012 ftunistlouisbrus https://doi.org/10.3354/meps09466 2024-04-18T18:02:24Z We studied CO 2 and O 2 dynamics in the western Antarctic Peninsula (WAP) waters in relation to (1) phytoplankton biomass, (2) microbial community primary production and respiration, and (3), for the first time, phytoplankton composition, during summer and fall in 3 consecutive years (2002, 2003 and 2004). The areal average of δpCO 2 (the difference between surface seawater and atmospheric partial pressure of CO 2) for the 3 yr was significantly negative (.20.04 ± 44.3 μatm, p < 0.01) during the summer to fall period in the region, possibly indicating a CO 2 sink. In the southern WAP (i.e. south of Anvers Island), δpCO 2 was significantly negative (.43.60 ± 39.06 μatm) during fall. In the northern WAP (north of Anvers Island), δpCO 2 values showed a more complex distribution during summer and fall (.4.96 ± 37.6 and 21.71 ± 22.39 μatm, respectively). Chlorophyll a (chl a) concentration averaged 1.03 ± 0.25 μg l.1 and was higher in the south of the peninsula. Phytoplankton composition influenced chl a concentration with higher and lower values for diatom-and phytoflagellate-dominated communities, respectively. A significant negative correlation existed between chl a and δpCO 2. From incubation experiments performed in the northern WAP, respiration was low (averaging 5.1 mmol O 2 m.3 d.1), and the net community production (NCP) correlated negatively with δpCO 2 and positively with %O 2 saturation. However, despite the high NCP values measured, δpCO 2 was significantly positive in the northern WAP during the summer to fall period. Strong mixing and lower chl a concentration may explain this result. In contrast, δpCO 2 was significantly negative in the southern WAP, possibly because of high surface water chl a concentration. © 2012 Inter-Research. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Anvers Island DIAL@USL-B (Université Saint-Louis, Bruxelles) Antarctic Antarctic Peninsula Anvers ENVELOPE(-63.500,-63.500,-64.600,-64.600) Anvers Island ENVELOPE(-63.500,-63.500,-64.600,-64.600) Marine Ecology Progress Series 446 45 59 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
CO 2 sources Primary production CO2 sinks Community respiration Phytoplankton biomass Phytoplankton composition |
spellingShingle |
CO 2 sources Primary production CO2 sinks Community respiration Phytoplankton biomass Phytoplankton composition Moreau, Sébastien Schloss, Irène Mostajir, Behzad Demers, Serge Almandoz, Gastón O. Ferrario, Martha E. Ferreyra, Gustavo A. Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
topic_facet |
CO 2 sources Primary production CO2 sinks Community respiration Phytoplankton biomass Phytoplankton composition |
description |
We studied CO 2 and O 2 dynamics in the western Antarctic Peninsula (WAP) waters in relation to (1) phytoplankton biomass, (2) microbial community primary production and respiration, and (3), for the first time, phytoplankton composition, during summer and fall in 3 consecutive years (2002, 2003 and 2004). The areal average of δpCO 2 (the difference between surface seawater and atmospheric partial pressure of CO 2) for the 3 yr was significantly negative (.20.04 ± 44.3 μatm, p < 0.01) during the summer to fall period in the region, possibly indicating a CO 2 sink. In the southern WAP (i.e. south of Anvers Island), δpCO 2 was significantly negative (.43.60 ± 39.06 μatm) during fall. In the northern WAP (north of Anvers Island), δpCO 2 values showed a more complex distribution during summer and fall (.4.96 ± 37.6 and 21.71 ± 22.39 μatm, respectively). Chlorophyll a (chl a) concentration averaged 1.03 ± 0.25 μg l.1 and was higher in the south of the peninsula. Phytoplankton composition influenced chl a concentration with higher and lower values for diatom-and phytoflagellate-dominated communities, respectively. A significant negative correlation existed between chl a and δpCO 2. From incubation experiments performed in the northern WAP, respiration was low (averaging 5.1 mmol O 2 m.3 d.1), and the net community production (NCP) correlated negatively with δpCO 2 and positively with %O 2 saturation. However, despite the high NCP values measured, δpCO 2 was significantly positive in the northern WAP during the summer to fall period. Strong mixing and lower chl a concentration may explain this result. In contrast, δpCO 2 was significantly negative in the southern WAP, possibly because of high surface water chl a concentration. © 2012 Inter-Research. |
author2 |
UCL - SST/ELI - Earth and Life Institute Université du Québec - Institut des Sciences de la Mer |
format |
Article in Journal/Newspaper |
author |
Moreau, Sébastien Schloss, Irène Mostajir, Behzad Demers, Serge Almandoz, Gastón O. Ferrario, Martha E. Ferreyra, Gustavo A. |
author_facet |
Moreau, Sébastien Schloss, Irène Mostajir, Behzad Demers, Serge Almandoz, Gastón O. Ferrario, Martha E. Ferreyra, Gustavo A. |
author_sort |
Moreau, Sébastien |
title |
Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
title_short |
Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
title_full |
Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
title_fullStr |
Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
title_full_unstemmed |
Influence of microbial community composition and metabolism on air.sea ΔpCO2 variation off the western Antarctic Peninsula |
title_sort |
influence of microbial community composition and metabolism on air.sea î”pco2 variation off the western antarctic peninsula |
publishDate |
2012 |
url |
http://hdl.handle.net/2078/122130 https://doi.org/10.3354/meps09466 |
long_lat |
ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-63.500,-63.500,-64.600,-64.600) |
geographic |
Antarctic Antarctic Peninsula Anvers Anvers Island |
geographic_facet |
Antarctic Antarctic Peninsula Anvers Anvers Island |
genre |
Antarc* Antarctic Antarctic Peninsula Anvers Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Anvers Island |
op_source |
Marine Ecology Progress Series, Vol. 446, no.1, p. 45-59 (2012) |
op_relation |
boreal:122130 http://hdl.handle.net/2078/122130 doi:10.3354/meps09466 urn:ISSN:0171-8630 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/meps09466 |
container_title |
Marine Ecology Progress Series |
container_volume |
446 |
container_start_page |
45 |
op_container_end_page |
59 |
_version_ |
1798841716549091328 |