Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community
Ocean acidification is expected to influence plankton community structure and biogeochemical element cycles. To date, the response of plankton communities to elevated CO 2 has been studied primarily during nutrient-stimulated blooms. In this CO 2 manipulation study, we used large-volume (~ 55 m 3 )...
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ftdoajarticles:oai:doaj.org/article:81aabe7cf4344e06a6a44dfe64a038da 2023-05-15T17:50:20+02:00 Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community A. J. Paul L. T. Bach K.-G. Schulz T. Boxhammer J. Czerny E. P. Achterberg D. Hellemann Y. Trense M. Nausch M. Sswat U. Riebesell 2015-10-01T00:00:00Z https://doi.org/10.5194/bg-12-6181-2015 https://doaj.org/article/81aabe7cf4344e06a6a44dfe64a038da EN eng Copernicus Publications http://www.biogeosciences.net/12/6181/2015/bg-12-6181-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-6181-2015 https://doaj.org/article/81aabe7cf4344e06a6a44dfe64a038da Biogeosciences, Vol 12, Iss 20, Pp 6181-6203 (2015) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/bg-12-6181-2015 2022-12-31T13:31:39Z Ocean acidification is expected to influence plankton community structure and biogeochemical element cycles. To date, the response of plankton communities to elevated CO 2 has been studied primarily during nutrient-stimulated blooms. In this CO 2 manipulation study, we used large-volume (~ 55 m 3 ) pelagic in situ mesocosms to enclose a natural summer, post-spring-bloom plankton assemblage in the Baltic Sea to investigate the response of organic matter pools to ocean acidification. The carbonate system in the six mesocosms was manipulated to yield average f CO 2 ranging between 365 and ~ 1230 μatm with no adjustment of naturally available nutrient concentrations. Plankton community development and key biogeochemical element pools were subsequently followed in this nitrogen-limited ecosystem over a period of 7 weeks. We observed higher sustained chlorophyll a and particulate matter concentrations (~ 25 % higher) and lower inorganic phosphate concentrations in the water column in the highest f CO 2 treatment (1231 μatm) during the final 2 weeks of the study period (Phase III), when there was low net change in particulate and dissolved matter pools. Size-fractionated phytoplankton pigment analyses indicated that these differences were driven by picophytoplankton (< 2 μm) and were already established early in the experiment during an initial warm and more productive period with overall elevated chlorophyll a and particulate matter concentrations. However, the influence of picophytoplankton on bulk organic matter pools was masked by high biomass of larger plankton until Phase III, when the contribution of the small size fraction (< 2 μm) increased to up to 90 % of chlorophyll a . In this phase, a CO 2 -driven increase in water column particulate carbon did not lead to enhanced sinking material flux but was instead reflected in increased dissolved organic carbon concentrations. Hence ocean acidification may induce changes in organic matter partitioning in the upper water column during the low-nitrogen summer ... Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 12 20 6181 6203 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 A. J. Paul L. T. Bach K.-G. Schulz T. Boxhammer J. Czerny E. P. Achterberg D. Hellemann Y. Trense M. Nausch M. Sswat U. Riebesell Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Ocean acidification is expected to influence plankton community structure and biogeochemical element cycles. To date, the response of plankton communities to elevated CO 2 has been studied primarily during nutrient-stimulated blooms. In this CO 2 manipulation study, we used large-volume (~ 55 m 3 ) pelagic in situ mesocosms to enclose a natural summer, post-spring-bloom plankton assemblage in the Baltic Sea to investigate the response of organic matter pools to ocean acidification. The carbonate system in the six mesocosms was manipulated to yield average f CO 2 ranging between 365 and ~ 1230 μatm with no adjustment of naturally available nutrient concentrations. Plankton community development and key biogeochemical element pools were subsequently followed in this nitrogen-limited ecosystem over a period of 7 weeks. We observed higher sustained chlorophyll a and particulate matter concentrations (~ 25 % higher) and lower inorganic phosphate concentrations in the water column in the highest f CO 2 treatment (1231 μatm) during the final 2 weeks of the study period (Phase III), when there was low net change in particulate and dissolved matter pools. Size-fractionated phytoplankton pigment analyses indicated that these differences were driven by picophytoplankton (< 2 μm) and were already established early in the experiment during an initial warm and more productive period with overall elevated chlorophyll a and particulate matter concentrations. However, the influence of picophytoplankton on bulk organic matter pools was masked by high biomass of larger plankton until Phase III, when the contribution of the small size fraction (< 2 μm) increased to up to 90 % of chlorophyll a . In this phase, a CO 2 -driven increase in water column particulate carbon did not lead to enhanced sinking material flux but was instead reflected in increased dissolved organic carbon concentrations. Hence ocean acidification may induce changes in organic matter partitioning in the upper water column during the low-nitrogen summer ... |
format |
Article in Journal/Newspaper |
author |
A. J. Paul L. T. Bach K.-G. Schulz T. Boxhammer J. Czerny E. P. Achterberg D. Hellemann Y. Trense M. Nausch M. Sswat U. Riebesell |
author_facet |
A. J. Paul L. T. Bach K.-G. Schulz T. Boxhammer J. Czerny E. P. Achterberg D. Hellemann Y. Trense M. Nausch M. Sswat U. Riebesell |
author_sort |
A. J. Paul |
title |
Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
title_short |
Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
title_full |
Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
title_fullStr |
Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
title_full_unstemmed |
Effect of elevated CO 2 on organic matter pools and fluxes in a summer Baltic Sea plankton community |
title_sort |
effect of elevated co 2 on organic matter pools and fluxes in a summer baltic sea plankton community |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-6181-2015 https://doaj.org/article/81aabe7cf4344e06a6a44dfe64a038da |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Biogeosciences, Vol 12, Iss 20, Pp 6181-6203 (2015) |
op_relation |
http://www.biogeosciences.net/12/6181/2015/bg-12-6181-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-6181-2015 https://doaj.org/article/81aabe7cf4344e06a6a44dfe64a038da |
op_doi |
https://doi.org/10.5194/bg-12-6181-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
20 |
container_start_page |
6181 |
op_container_end_page |
6203 |
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1766157046678290432 |