DMSP-consuming bacteria associated with the calanoid copepod Acartia tonsa (Dana)

K.W. Tang, P.T. Visscher, H.G. Dam

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

DMSP-consuming bacteria (DCB) were recovered from the body and fecal pellets of the copepod Acartia tonsa (Dana). The most probable number of DCB associated with starved A. tonsa was 9.2 X 10(2) cells copepod(-1). The abundance of DCB recovered from the copepod body increased to 1.6-2.8 X 10(4) after the copepod fed on DMSP-containing alga. DCB abundance associated with fecal pellets averaged 1.2 X 10(4) cells pellet(-1). In enrichment cultures, the DCB grew with a doubling time of 1.1- 2.9 days, and consumed DMSP at a rate of 4.5-7.5 fmol cell(-1) day(-1). The apparent DMSP-to-DMS conversion efficiency was 25- 41% for DCB from copepod body, and 99% for DCB from fecal pellets. Our study demonstrated that copepods and their fecal pellets may harbour dense populations of DCB, and that the copepod-bacteria coupling represents a novel mechanism for DMSP consumption in the water column. (C) 2001 Elsevier Science B.V. All rights reserved.
Original languageEnglish
JournalJournal of Experimental Marine Biology and Ecology
Volume256
Issue number2
Pages (from-to)185-198
ISSN0022-0981
Publication statusPublished - 2001

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