Roy, Shovonlal ; Chattopadhyay, J. (2007) Enrichment and ecosystem stability: Effect of toxic food Biosystems, 90 (1). pp. 151-160. ISSN 03032647
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Official URL: http://doi.org/10.1016/j.biosystems.2006.07.009
Related URL: http://dx.doi.org/10.1016/j.biosystems.2006.07.009
Abstract
Enrichment in resource availability theoretically destabilizes predator–prey dynamics (the paradox of enrichment). However, a minor change in the resource stoichiometry may make a prey toxic for the predator, and the presence of toxic prey affects the dynamics significantly. Here, theoretically we explore how, at increased carrying capacity, a toxic prey affects the oscillation or destabilization of predator–prey dynamics, and how its presence influences the growth of the predator as well as that of a palatable prey. Mathematical analysis determines the bounds on the food toxicity that allow the coexistence of a predator along with a palatable and a toxic prey. The overall results demonstrate that toxic food counteracts oscillation (destabilization) arising from enrichment of resource availability. Moreover, our results show that, at increased resource availability, toxic food that acts as a source of extra mortality may increase the abundance of the predator as well as that of the palatable prey.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Ireland Ltd |
Keywords: | Paradox of enrichment;Food toxicity;Stability;Hopf bifurcation |
ID Code: | 132407 |
Deposited On: | 16 Dec 2022 05:18 |
Last Modified: | 16 Dec 2022 05:18 |
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