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Journal of Plankton Research Vol.24 no.9 pp.953-955, 2002
© Oxford University Press 2002

COMMENT

Co-nutrient limitation of diatom growth under nitrogen or silicon limitation. A reply to the paper of Flynn and Martin-Jézéquel

Keith Davidson

Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll Pa37 1qa, UK

Corresponding Author: kda{at}dml.ac.uk

Abstract

Flynn and Martin-Jézéquel (J. Plankton Res., 22, 447–472, 2000) derived a mechanistic model for nitrogen and silicon physiology of diatoms. During their analysis, they compared the output of this model with that of the co-nutrient model of Davidson and Gurney (J. Plankton Res., 21, 839–858, 1999). They highlighted some discrepancies between the predictions of the two models, which occurred subsequent to exhaustion of the yield-limiting nutrient, and suggested that the co-nutrient model contained technical inaccuracies in its output. Here it is shown that by simply modifying the numerical values of two of the parameters of the co-nutrient model, while retaining exactly the same model structure, it is possible to produce similar dynamics to those exhibited by the model of Flynn and Martin-Jézéquel.


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