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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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Population dyanamics and element recycling in an aquatic plant herbivore system

Nisbet, R.M. and McCauley, E. and de Roos, A.M. and Murdoch, W.W. and Gurney, William (1991) Population dyanamics and element recycling in an aquatic plant herbivore system. Theoretical Population Biology, 40 (2). pp. 125-147. ISSN 0040-5809

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Abstract

We construct a model of an aquatic plant-herbivore system which takes explicit account of the cycling of the element limiting plant growth. The work is motivated by experiments on the population dynamics of the waterflea Daphnia where the Daphnia population is regulated by the availability of algal food, but the algae are phosphorus limited. The model is used to investigate the possibility that the system may be stabilised by a mechanism in which the Daphnia constitute a temporary phosphorus “sink”. We conclude that this is unlikely if the system is closed to external input of the nutrients limiting plant growth.