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


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
Issue number2
Pages (from-to)185-198
Publication statusPublished - 2001

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