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A Serious Inhibition Problem from a Niskin Sampler During Plankton Productivity Studies

P. J. leB. Williams and J. I. Robertson
Limnology and Oceanography
Vol. 34, No. 7 (Nov., 1989), pp. 1300-1305
Stable URL: http://www.jstor.org/stable/2837168
Page Count: 6
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A Serious Inhibition Problem from a Niskin Sampler During Plankton Productivity Studies
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Abstract

Low photosynthetic rates and reductions in chlorophyll concentrations were observed in incubations of samples taken with a 30-liter Niskin sampler during productivity studies of oligotrophic waters in the Indian Ocean. By contrast there appeared to be no effect on community respiration. The rates of photosynthesis were 5-fold to 10-fold greater in samples taken with Teflon-lined 10-liter GoFlo bottles, and there was no systematic loss of chlorophyll. The central rubber cord of the Niskin sampler was identified as a potent source of contamination.

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