Plankton community and bacterial metabolism in Arctic sea ice leads during summer 2010

García-Martín, E. E., Serret, P. and Leakey, R. J. G. (2014) Plankton community and bacterial metabolism in Arctic sea ice leads during summer 2010. Deep-Sea Research Part I-Oceanographic Research Papers, 92. pp. 152-161. ISSN 0967-0637

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Abstract

Microbial plankton metabolism was examined during summer 2010 in sea ice-influenced waters of the Fram Strait, eastern Arctic Ocean. Rates of gross primary production and community respiration were tightly coupled over a wide range of values (33±3–143±6 and 20±3–126±6 mmol O2 m−2 −1, respectively) leading to a prevalence of positive net community production. The high variability in community respiration, similar to that of gross primary production, suggests that heterotrophic metabolism may exhibit a significant response to environmental change. Bacterial respiration was assessed at similar time scales to bacterial production measurements, by determining the in vivo INT reduction capacity without pre-filtering the community. Bacteria seem to play a major role in total community respiration, contributing between 5% and 61% of total community respiration, indicating that a high fraction of the organic carbon in Arctic planktonic food webs could flow through these microbes.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Environmental Sciences
Depositing User:	Pure Connector
Date Deposited:	08 Oct 2014 08:50
Last Modified:	08 Sep 2024 00:23
URI:	https://ueaeprints.uea.ac.uk/id/eprint/50206
DOI:	10.1016/j.dsr.2014.06.007

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