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    Interactions among interactions: The dynamical consequences of antagonism between mutualists

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    20200108_MutAnt_JTB_revision.pdf
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    Description:
    Final Accepted Manuscript
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    Author
    Yule, Kelsey M
    Johnson, Christopher A
    Bronstein, Judith L
    Ferrière, Régis
    Affiliation
    Univ Arizona, Dept Ecol & Evolutionary Biol
    Univ Arizona, Paris Sci & Lettres Univ, Int Res Lab Interdisciplinary Global Environm Stu
    Issue Date
    2020-05-31
    Keywords
    Indirect effects
    Non-consumptive effects
    Predator-prey
    Press perturbation
    Stage-structured population dynamics
    
    Metadata
    Show full item record
    Publisher
    ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
    Citation
    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 biology
    Rights
    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 2020
    ISSN
    0022-5193
    EISSN
    1095-8541
    PubMed ID
    32492378
    DOI
    10.1016/j.jtbi.2020.110334
    Version
    Final accepted manuscript
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jtbi.2020.110334
    Scopus Count
    Collections
    UA Faculty Publications

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