Carbon cycling and phytoplankton responses within highly-replicated shipboard carbonate chemistry manipulation experiments conducted around Northwest European Shelf Seas

Richier, S; Achterberg, EP; Dumousseaud, C; Poulton, AJ; Suggett, DJ; Tyrrell, T; Zubkov, MV; Moore, CM

Carbon cycling and phytoplankton responses within highly-replicated shipboard carbonate chemistry manipulation experiments conducted around Northwest European Shelf Seas

Richier, S Achterberg, EP Dumousseaud, C Poulton, AJ Suggett, DJ Tyrrell, T Zubkov, MV Moore, CM

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Publisher:: Copernicus GmbH
Publication Type:: Journal Article
Citation:: Biogeosciences Discussions, 2014, 11, (3), pp. 3489-3534
Issue Date:: 2014-03-03

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Field	Value	Language
dc.contributor.author	Richier, S
dc.contributor.author	Achterberg, EP
dc.contributor.author	Dumousseaud, C
dc.contributor.author	Poulton, AJ
dc.contributor.author	Suggett, DJ
dc.contributor.author	Tyrrell, T
dc.contributor.author	Zubkov, MV
dc.contributor.author	Moore, CM
dc.date.accessioned	2021-03-01T21:51:54Z
dc.date.available	2021-03-01T21:51:54Z
dc.date.issued	2014-03-03
dc.identifier.citation	Biogeosciences Discussions, 2014, 11, (3), pp. 3489-3534
dc.identifier.issn	1810-6277
dc.identifier.uri	http://hdl.handle.net/10453/146602
dc.description.abstract	<jats:p>Abstract. The ongoing oceanic uptake of anthropogenic carbon dioxide (CO2) is significantly altering the carbonate chemistry of seawater, a phenomenon referred to as ocean acidification. Experimental manipulations have been increasingly used to gauge how continued ocean acidification will potentially impact marine ecosystems and their associated biogeochemical cycles in the future; however, results amongst studies, particularly when performed on natural communities, are highly variable, which in part likely reflects inconsistencies in experimental approach. To investigate the potential for identification of more generic responses and greater experimentally reproducibility, we devised and implemented a series of highly replicated (n = 8), short term (2–4 days) multi-level (&amp;geq; 4 conditions) carbonate chemistry/nutrient manipulation experiments on a range of natural microbial communities sampled in Northwest European shelf seas. Carbonate chemistry manipulations and resulting biological responses were found to be highly reproducible within individual experiments and to a lesser extent between geographically different experiments. Statistically robust reproducible physiological responses of phytoplankton to increasing pCO2, characterized by a suppression of net growth for small sized cells (< 10 μm), were observed in the majority of the experiments, irrespective of nutrient status. Remaining between-experiment variability was potentially linked to initial community structure and/or other site-specific environmental factors. Analysis of carbon cycling within the experiments revealed the expected increased sensitivity of carbonate chemistry to biological processes at higher pCO2 and hence lower buffer capacity. The results thus emphasize how biological-chemical feedbacks may be altered in the future ocean. </jats:p>
dc.language	en
dc.publisher	Copernicus GmbH
dc.relation.ispartof	Biogeosciences Discussions
dc.relation.isbasedon	10.5194/bgd-11-3489-2014
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0499 Other Earth Sciences, 0601 Biochemistry and Cell Biology
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.title	Carbon cycling and phytoplankton responses within highly-replicated shipboard carbonate chemistry manipulation experiments conducted around Northwest European Shelf Seas
dc.type	Journal Article
utslib.citation.volume	11
utslib.for	0499 Other Earth Sciences
utslib.for	0601 Biochemistry and Cell Biology
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
dc.date.updated	2021-03-01T21:51:53Z
pubs.issue	3
pubs.volume	11
utslib.citation.issue	3

Abstract:

Abstract. The ongoing oceanic uptake of anthropogenic carbon dioxide (CO2) is significantly altering the carbonate chemistry of seawater, a phenomenon referred to as ocean acidification. Experimental manipulations have been increasingly used to gauge how continued ocean acidification will potentially impact marine ecosystems and their associated biogeochemical cycles in the future; however, results amongst studies, particularly when performed on natural communities, are highly variable, which in part likely reflects inconsistencies in experimental approach. To investigate the potential for identification of more generic responses and greater experimentally reproducibility, we devised and implemented a series of highly replicated (n = 8), short term (2–4 days) multi-level (&geq; 4 conditions) carbonate chemistry/nutrient manipulation experiments on a range of natural microbial communities sampled in Northwest European shelf seas. Carbonate chemistry manipulations and resulting biological responses were found to be highly reproducible within individual experiments and to a lesser extent between geographically different experiments. Statistically robust reproducible physiological responses of phytoplankton to increasing pCO2, characterized by a suppression of net growth for small sized cells (< 10 μm), were observed in the majority of the experiments, irrespective of nutrient status. Remaining between-experiment variability was potentially linked to initial community structure and/or other site-specific environmental factors. Analysis of carbon cycling within the experiments revealed the expected increased sensitivity of carbonate chemistry to biological processes at higher pCO2 and hence lower buffer capacity. The results thus emphasize how biological-chemical feedbacks may be altered in the future ocean.

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