HarveySeguinNozaisEtAl2013

Référence

Harvey, E., Seguin, A., Nozais, C., Archambault, P., Gravel, D. (2013) Identity effects dominate the impacts of multiple species extinctions on the functioning of complex food webs. Ecology, 94(1):169-179. (Scopus )

Résumé

Understanding the impacts of species extinctions on the functioning of food webs is a challenging task because of the complexity of ecological interactions. We report the impacts of experimental species extinctions on the functioning of two food webs of freshwater and marine systems. We used a linear model to partition the variance among the multiple components of the diversity effect (linear group richness, nonlinear group richness, and identity). The identity of each functional group was the best explaining variable of ecosystem functioning for both systems. We assessed the contribution of each functional group in multifunctional space and found that, although the effect of functional group varied across ecosystem functions, some functional groups shared common effects on functions. This study is the first experimental demonstration that functional identity dominates the effects of extinctions on ecosystem functioning, suggesting that generalizations are possible despite the inherent complexity of interactions. © 2013 by the Ecological Society of America.

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@ARTICLE { HarveySeguinNozaisEtAl2013,
    AUTHOR = { Harvey, E. and Seguin, A. and Nozais, C. and Archambault, P. and Gravel, D. },
    TITLE = { Identity effects dominate the impacts of multiple species extinctions on the functioning of complex food webs },
    JOURNAL = { Ecology },
    YEAR = { 2013 },
    VOLUME = { 94 },
    PAGES = { 169-179 },
    NUMBER = { 1 },
    NOTE = { cited By 7 },
    ABSTRACT = { Understanding the impacts of species extinctions on the functioning of food webs is a challenging task because of the complexity of ecological interactions. We report the impacts of experimental species extinctions on the functioning of two food webs of freshwater and marine systems. We used a linear model to partition the variance among the multiple components of the diversity effect (linear group richness, nonlinear group richness, and identity). The identity of each functional group was the best explaining variable of ecosystem functioning for both systems. We assessed the contribution of each functional group in multifunctional space and found that, although the effect of functional group varied across ecosystem functions, some functional groups shared common effects on functions. This study is the first experimental demonstration that functional identity dominates the effects of extinctions on ecosystem functioning, suggesting that generalizations are possible despite the inherent complexity of interactions. © 2013 by the Ecological Society of America. },
    AUTHOR_KEYWORDS = { Biodiversity; Ecosystem functioning; Food web; Functional groups; Marine and freshwater food webs; Species extinctions; Species identity; Species interactions },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1890/12-0414.1 },
    KEYWORDS = { fresh water, ecosystem function; experimental study; extinction; food web; freshwater ecosystem; interspecific interaction; marine ecosystem; numerical model; species occurrence, animal; article; biodiversity; biological model; Canada; classification; environmental protection; food chain; Fucus; invertebrate; physiology; sea; species extinction, Animals; Biodiversity; Canada; Conservation of Natural Resources; Extinction, Biological; Food Chain; Fresh Water; Fucus; Invertebrates; Models, Biological; Oceans and Seas },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84876100618&partnerID=40&md5=1cc1ae7c031c6a52e48b3cf18b927a9f },
}

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