Interactions among interactions: The dynamical consequences of antagonism between mutualists
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Final Accepted Manuscript
Affiliation
Univ Arizona, Dept Ecol & Evolutionary BiolUniv Arizona, Paris Sci & Lettres Univ, Int Res Lab Interdisciplinary Global Environm Stu
Issue Date
2020-05-31Keywords
Indirect effectsNon-consumptive effects
Predator-prey
Press perturbation
Stage-structured population dynamics
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ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTDCitation
Yule, K. M., Johnson, C. A., Bronstein, J. L., & Ferrière, R. (2020). Interactions among interactions: The dynamical consequences of antagonism between mutualists. Journal of Theoretical Biology, 110334.Journal
Journal of theoretical biologyRights
Copyright © 2020 Elsevier Ltd. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Species often interact with multiple mutualistic partners that provide functionally different benefits and/or that interact with different life-history stages. These functionally different partners, however, may also interact directly with one another in other ways, indirectly altering net outcomes and persistence of the mutualistic system as a whole. We present a population dynamical model of a three-species system involving antagonism between species sharing a mutualist partner species with two explicit life stages. We find that, regardless of whether the antagonism is predatory or non-consumptive, persistence of the shared mutualist is possible only under a restrictive set of conditions. As the rate of antagonism between the species sharing the mutualist increases, indirect rather than direct interactions increasingly determine species' densities and sometimes result in complex, oscillatory dynamics for all species. Surprisingly, persistence of the mutualistic system is particularly dependent upon the degree to which each of the two mutualistic interactions is specialized. Our work investigates a novel mechanism by which changing ecological conditions can lead to extinction of mutualist partners and provides testable predictions regarding the interactive roles of mutualism and antagonism in net outcomes for species' densities. (C) 2020 Elsevier Ltd. All rights reserved.Note
12 month embargo; available online 31 May 2020ISSN
0022-5193EISSN
1095-8541PubMed ID
32492378Version
Final accepted manuscriptae974a485f413a2113503eed53cd6c53
10.1016/j.jtbi.2020.110334
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