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Author (up) Gonzalez-Olivares, E.; Gonzalez-Yanez, B.; Becerra-Klix, R.; Ramos-Jiliberto, R.
Title Multiple stable states in a model based on predator-induced defenses Type
Year 2017 Publication Ecological Complexity Abbreviated Journal Ecol. Complex.
Volume 32 Issue Pages 111-120
Keywords Predator prey theory; Inducible defenses; Refuges; Stability; Separatrix
Abstract A large variety of antipredator defenses are exhibited by plants, animals and microbes in nature. A deep understanding of the dynamic consequences of prey responses to predation risk is essential for building a comprehensive theory of food webs. Here we present a simple classification of prey defenses based on the sensitivity of prey immunity to predation respect to abundances of prey and predators. Only three out of six defense types have been analytically studied in the context of predator-prey dynamics, which reveals a serious gap in our current knowledge of ecological interactions. In this study we present a mathematical analysis on a widely occurring type of prey defense whose behavior has not been established in exact terms. The study model considers prey whose average immunity to predators is enhanced by predator abundance. This case, known as inducible defenses, has been reported for a wide array of species. Our results reveal a rich dynamic behavior, in which the predator-prey system exhibits either one, two or three positive equilibrium points, with up to two attractors. Thus, inducible defenses constitute a mechanism that could drive alternative stable states even in very simple food web models. (C) 2017 Elsevier B.V. All rights reserved.
Address [Gonzalez-Olivares, Eduardo; Gonzalez-Yanez, Betsabe] Pontificia Univ Catolica Valparaiso, Av Brasil 2950, Valparaiso, Chile, Email: ejgonzal@ucv.cl;
Corporate Author Thesis
Publisher Elsevier Science Bv Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1476-945x ISBN Medium
Area Expedition Conference
Notes WOS:000418989900009 Approved
Call Number UAI @ eduardo.moreno @ Serial 825
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