Abstract
Populations are either enhanced via resonant cycles or suppressed via attenuant cycles by periodic environments. We develop a signature function for predicting the response of discretely reproducing populations to 2-periodic fluctuations of both a characteristic of the environment (carrying capacity), and a characteristic of the population (inherent growth rate). Our signature function is the sign of a weighted sum of the relative strengths of the oscillations of the carrying capacity and the demographic characteristic. Periodic environments are deleterious for populations when the signature function is negative. However, positive signature functions signal favorable environments. We compute the signature functions of six classical discrete-time single species population models, and use the functions to determine regions in parameter space that are either favorable or detrimental to the populations. The two-parameter classical models include the Ricker, Beverton-Holt, Logistic, and Maynard Smith models.
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Franke, J.E., Yakubu, AA. Signature Function for Predicting Resonant and Attenuant Population 2-cycles. Bull. Math. Biol. 68, 2069–2104 (2006). https://doi.org/10.1007/s11538-006-9086-8
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DOI: https://doi.org/10.1007/s11538-006-9086-8