Stochastic growth reduces population fluctuations in Daphnia-algal systems
Ananthasubramaniam, Bharath and Nisbet, Roger and Nelson, William and McCauley, Edward and Gurney, William (2011) Stochastic growth reduces population fluctuations in Daphnia-algal systems. Ecology, 92 (2). pp. 362-372. ISSN 0012-9658
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Deterministic, size-structured models are widely used to describe consumer-resource interactions. Such models typically ignore potentially large random variability in juvenile development rates. We present simple representations of this variability and show five approaches to calculating the model parameters for Daphnia pulex interacting with its algal food. Using our parameterized models of growth variability, we investigate the robustness of a recently proposed stabilizing mechanism for Daphnia populations. Growth rate variability increases the range of enrichments over which small amplitude cycles or quasi-cycles occur, thus increasing the plausibility that the underlying mechanism contributes to the prevalence of small amplitude cycles in the field and in experiments. More generally, our approach allows us to relate commonly available information on variance of development times to population stability
Author(s): | Ananthasubramaniam, Bharath, Nisbet, Roger, Nelson, William, McCauley, Edward and Gurney, William | Item type: | Article |
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ID code: | 30364 |
Keywords: | Daphnia, growth variability, multiple attractors, quasi-cycles, robustness, stability, stage-structured models, stochastic population dynamics , Environmental Sciences, Probabilities. Mathematical statistics, Biology, Ecology, Evolution, Behavior and Systematics |
Subjects: | Geography. Anthropology. Recreation > Environmental Sciences Science > Mathematics > Probabilities. Mathematical statistics Science > Natural history > Biology |
Department: | Faculty of Science > Mathematics and Statistics |
Depositing user: | Pure Administrator |
Date deposited: | 24 May 2011 14:12 |
Last modified: | 03 Jan 2019 12:45 |
Related URLs: | |
URI: | https://strathprints.strath.ac.uk/id/eprint/30364 |
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