Dissolved organic carbon and bacterial populations in the gelatinous surface microlayer of a Norwegian fjord mesocosm.

Cunliffe, Michael, Salter, Matthew, Mann, Paul, Whiteley, Andrew, Upstill-Goddard, Robert and Murrell, Colin (2009) Dissolved organic carbon and bacterial populations in the gelatinous surface microlayer of a Norwegian fjord mesocosm. FEMS Microbiology Letters, 299 (2). pp. 248-254. ISSN 0378-1097

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Abstract

The sea surface microlayer is the interfacial boundary layer between the marine environment and the troposphere. Surface microlayer samples were collected during a fjord mesocosm experiment to study microbial assemblage dynamics within the surface microlayer during a phytoplankton bloom. Transparent exopolymer particles were significantly enriched in the microlayer samples, supporting the concept of a gelatinous surface film. Dissolved organic carbon and bacterial cell numbers (determined by flow cytometry) were weakly enriched in the microlayer samples. However, the numbers of Bacteria 16S rRNA genes (determined by quantitative real-time PCR) were more variable, probably due to variable numbers of bacterial cells attached to particles. The enrichment of transparent exopolymer particles in the microlayer and the subsequent production of a gelatinous biofilm have implications on air–sea gas transfer and the partitioning of organic carbon in surface waters.

Item Type:	Article
Uncontrolled Keywords:	surface microlayer, transparent exopolymer particles, bacteria, phytoplankton bloom, fjord, dissolved organic carbon
Subjects:	C400 Genetics C500 Microbiology F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences
Department:	Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User:	Paul Mann
Date Deposited:	29 Jul 2013 14:04
Last Modified:	13 Oct 2019 00:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/13302

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