Species-specific phytoplankton growth rates via diel DNA synthesis cycles. III. Accuracy of growth rate measurements in the dinoflagellate Prorocentrum minimum.

Antia, Avan, Carpenter, E. J. and Chang, J. (1990) Species-specific phytoplankton growth rates via diel DNA synthesis cycles. III. Accuracy of growth rate measurements in the dinoflagellate Prorocentrum minimum. Marine Ecology Progress Series, 63 . pp. 273-279.

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Abstract

The accuracy of species-specific phytoplankton growth rates estimated by cell cycle
analysis was tested with the dinoflagellate Prorocentrum minimum (Pav.) Sch. under conditions of
altered nitrogen and phosphorus availability. Reduced nutrient availability caused major changes in the
duration of cell cycle phases. At the nutrient level of complete f/2 media, the length of the combination
of S, G2, and M phases was about 8 h at growth rates of 0.53 to 0.56 d-' A decrease in ~ 0 ,o~r N-O3
concentration extended the S+G2+M phase to about 15.5 to 17.7 h at growth rates ranging from 0.41 to
0.30 d-' Changes in phase durations dld not significantly affect growth rate estimates. In addition, a
minimum growth rate, calculated from the maximum values on phase fraction curves, was shown to be
usable as an error detector in some cases. Results support the validity of cell cycle analysis to measure in
situ growth rates.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry
Refereed: Yes
ISSN: 0171-8630
Date Deposited: 18 Feb 2008 17:27
Last Modified: 17 Jan 2018 08:12
URI: http://eprints.uni-kiel.de/id/eprint/2895

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