FortinBuonoSchmitzEtAl2015

Reference

Fortin, D., Buono, P.-L., Schmitz, O.J., Courbin, N., Losier, C., St-Laurent, M.-H., Drapeau, P., Heppell, S., Dussault, C., Brodeur, V., Mainguy, J. (2015) A spatial theory for characterizing predator - Multiprey interactions in heterogeneous landscapes. Proceedings of the Royal Society B-Biological Sciences, 282(1812). (Scopus )

Abstract

Trophic interactions in multiprey systems can be largely determined by prey distributions. Yet, classic predator–prey models assume spatially homogeneous interactions between predators and prey. We developed a spatially informed theory that predicts how habitat heterogeneity alters the landscape-scale distribution of mortality risk of prey from predation, and hence the nature of predator interactions in multiprey systems. The theoretical model is a spatially explicit, multiprey functional response in which species-specific advection–diffusion models account for the response of individual prey to habitat edges. The model demonstrates that distinct responses of alternative prey species can alter the consequences of conspecific aggregation, from increasing safety to increasing predation risk. Observations of threatened boreal caribou, moose and grey wolf interacting over 378 181 km2 of human-managed boreal forest support this principle. This empirically supported theory demonstrates how distinct responses of apparent competitors to landscape heterogeneity, including to human disturbances, can reverse density dependence in fitness correlates. © 2015 The Author(s) Published by the Royal Society. All rights reserved.

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@ARTICLE { FortinBuonoSchmitzEtAl2015,
    AUTHOR = { Fortin, D. and Buono, P.-L. and Schmitz, O.J. and Courbin, N. and Losier, C. and St-Laurent, M.-H. and Drapeau, P. and Heppell, S. and Dussault, C. and Brodeur, V. and Mainguy, J. },
    TITLE = { A spatial theory for characterizing predator - Multiprey interactions in heterogeneous landscapes },
    JOURNAL = { Proceedings of the Royal Society B-Biological Sciences },
    YEAR = { 2015 },
    VOLUME = { 282 },
    NUMBER = { 1812 },
    NOTE = { cited By 0 },
    ABSTRACT = { Trophic interactions in multiprey systems can be largely determined by prey distributions. Yet, classic predator–prey models assume spatially homogeneous interactions between predators and prey. We developed a spatially informed theory that predicts how habitat heterogeneity alters the landscape-scale distribution of mortality risk of prey from predation, and hence the nature of predator interactions in multiprey systems. The theoretical model is a spatially explicit, multiprey functional response in which species-specific advection–diffusion models account for the response of individual prey to habitat edges. The model demonstrates that distinct responses of alternative prey species can alter the consequences of conspecific aggregation, from increasing safety to increasing predation risk. Observations of threatened boreal caribou, moose and grey wolf interacting over 378 181 km2 of human-managed boreal forest support this principle. This empirically supported theory demonstrates how distinct responses of apparent competitors to landscape heterogeneity, including to human disturbances, can reverse density dependence in fitness correlates. © 2015 The Author(s) Published by the Royal Society. All rights reserved. },
    AUTHOR_KEYWORDS = { Animal movement; Apparent competition; Caribou; Density dependence; Mortality risk; Predator–prey interaction },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1098/rspb.2015.0973 },
    KEYWORDS = { Animalia; Rangifer tarandus },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84938382202&partnerID=40&md5=a1e858fac09dc760119e563be6547607 },
}

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