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Journal of Plankton Research Vol.22 no.9 pp.1801-1809, 2000
© Oxford University Press 2000

Short Communication

Relative efficiencies of carbon transfer from bacteria and algae to zooplankton in a subtropical lake

Karl E. Havens, Kirsten A. Work and Therese L. East

South Florida Water Management District, 3301 Gun Club Road, West Palm Beach, Florida 33416–4680, USA

Direct measurements were made of carbon transfer efficiency from bacteria and algae to zooplankton in subtropical Lake Okeechobee, Florida, USA. A radio-tracer method was used to determine carbon transfer efficiency to the >200 µm size class, comparing results from treatments where the label was added as 14C glucose or 14C-bicarbonate. The studies were done at a near-shore and an offshore site, and repeated on five occasions between July 1998 and 1999. The results displayed little variation with location, month, or type of tracer used. After 4 h incubations, between 0.1 and 1.0% of the particulate activity occurred in the >200 µm size class. Low efficiencies suggest a considerable loss of carbon from the copepod- and cyanobacteria-dominated food web; this seems to be typical of highly eutrophic lakes.


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This article has been cited by other articles:


Home page
 J PLANKTON RESHome page
K. E. Havens, J. R. Beaver, and T. L. East
Plankton biomass partitioning in a eutrophic subtropical lake: comparison with results from temperate lake ecosystems
J. Plankton Res., December 1, 2007; 29(12): 1087 - 1097.
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Home page
 J PLANKTON RESHome page
K. Work, K. Havens, B. Sharfstein, and T. East
How important is bacterial carbon to planktonic grazers in a turbid, subtropical lake?
J. Plankton Res., April 1, 2005; 27(4): 357 - 372.
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