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Modelling the interacting effects of nutrient uptake, light capture and temperature on phytoplankton growth

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UNSPECIFIED (2001) Modelling the interacting effects of nutrient uptake, light capture and temperature on phytoplankton growth. JOURNAL OF PLANKTON RESEARCH, 23 (8). pp. 829-840. ISSN 0142-7873.

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Abstract

A model of phytoplankton growth developed by analogy with chemical kinetics (CR model) in Baird and Emsley (F. Plankton Res., 21, 85-126, 1999) is explored further. The CR model parameterizes all biochemical reactions involved in phytoplankton growth by one parameter. the maximum growth rate. Phytoplankton growth rate is then calculated from an interaction of the maximum growth rate, and the physical limit to extracellular nutrient uptake rates and light capture. In this paper, the CR model was re-derived, with two corrections and a number of modifications to increase its generality. During derivation, the model's behaviour was compared with chemostat cultures at a variety, of dilution rates, nutrient inputs and temperatures. Model output was then plotted against observations of a semi-continuous culture of Isochrysis galbana. Finally, the CR model was used to predict the growth rate of phytoplankton communities extracted from two temperate takes under varying nutrient, light and temperature regimes. The CR model explained 37% of the variability of phytoplankton growth rate in cultures at environmental conditions similar to those of the lakes, compared with 25% explained by a non-linear best fit to 324 growth experiments. The following paper in this issue develops the CR model further, using it to predict stable carbon isotope fractionation.

Item Type: Journal Article
Subjects: Q Science > QH Natural history > QH301 Biology
G Geography. Anthropology. Recreation > GC Oceanography
Journal or Publication Title: JOURNAL OF PLANKTON RESEARCH
Publisher: OXFORD UNIV PRESS
ISSN: 0142-7873
Official Date: August 2001
Dates:
DateEvent
August 2001UNSPECIFIED
Volume: 23
Number: 8
Number of Pages: 12
Page Range: pp. 829-840
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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