Bacterial response to presence of eukaryote inhibitors in water from a coastal marine environment |
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| Authors: | SY Newell BF Sherr EB Sherr RD Fallon |
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| Institution: | University of Georgia Marine Institute, Sapelo Island, Georgia 31327, USA |
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| Abstract: | A method involving chemical (cycloheximide, thiram) inhibition of protozoan bacterivores was applied in an attempt to estimate marine bacterioplanktonic growth rates. The inhibitors were capable of preventing growth of marine protozoan bacterivores at concentrations which did not inhibit growth of marine bacterial assemblages. Use of the predator-inhibition method with incubated water samples from a nearshore marine environment indicated that protozoan grazing control of the size of bacterial standing crop was quite variable with time and site. The apparent degree of control ranged from non-existent to complete. As a means of estimating bacterial generation times, the predator-inhibition method gave results more closely aligned with those of a dividing-cells technique than a 3H]thymidine technique. |
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