Journal of Plankton Research Vol.25 no.2 pp.235-242, 2003
© Oxford University Press 2003
SHORT COMMUNICATION |
Is dimethyl sulphide production related to microzooplankton herbivory in the southern North Sea?
Plymouth Marine Laboratory, Prospect Place, Plymouth PL1 3DH and 1 School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
* Corresponding Author: stda{at}pml.ac.uk
Microzooplankton herbivory is considered to be a key process by which dimethylsulphoniopropionate (DMSP) in phytoplankton is transformed to climatically active dimethyl sulphide (DMS). However, there is little firm evidence to show that this occurs in natural waters. We used direct measurements of microzooplankton grazing rates and net DMS production in the southern North Sea to examine the impact of herbivory on DMS production. Estimates of the particulate DMSP ingested by microzooplankton in the form of Phaeocystis sp. were found to account for the DMS production rates observed.