Precision of estimates of phytoplankton growth and microzooplankton grazing when the functional response of grazers may be nonlinear

Precision of estimates of phytoplankton growth and microzooplankton grazing when the functional response of grazers may be nonlinear

The analysis of dilution experiments for determining rates of phytoplankton growth and microzooplankton grazing needs to be reconsidered. Zooplankton grazing may saturate at high food concentrations, and therefore experimental data should be fitted with models that include this possibility. Such mod...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) Vol. 80; no. 2/3; pp. 285 - 290
Main Authors: Evans, Geoffrey T., Paranjape, Madhu A.
Format: Journal Article
Language:English
Published: Inter-Research 1992
Subjects:
Analytical estimating
Curvature
Error rates
Functional responses
Linear models
Marine
Modeling
Parametric models
Phytoplankton
Population dynamics
Population growth rate
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Summary:The analysis of dilution experiments for determining rates of phytoplankton growth and microzooplankton grazing needs to be reconsidered. Zooplankton grazing may saturate at high food concentrations, and therefore experimental data should be fitted with models that include this possibility. Such models will fit the data better; as a consequence, they will reveal some of the uncertainty in the rate estimates that linear analysis conceals. We illustrate this point with simulated and real dilution experiments.
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ISSN:0171-8630
1616-1599
DOI:10.3354/meps080285