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Authordc.contributor.authorRamos Jiliberto, Rodrigo 
Authordc.contributor.authorGaray Narváez, Leslie 
Authordc.contributor.authorMedina, Matías H. 
Cita de ítemdc.identifier.citationEcotoxicology (2012) 21:234–243en_US
Identifierdc.identifier.otherDOI 10.1007/s10646-011-0782-2
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractThe coast of Chañaral Bay in northern Chile has been affected by copper mine wastes for decades. This sustained perturbation has disrupted the intertidal community in several ways, but the mechanisms behind the observed shifts in local biodiversity remain poorly understood. Our main goal was to identify the species (lumped into trophic groups) belonging to the Chan˜aral intertidal community that, being directly affected by copper pollution, contributed primarily to the generation of the observed changes in community structure. These groups of species were called initiators. We applied a qualitative modelling approach based only on the sign and direction of effects among species, and present a formula for predicting changes in equilibrium abundances considering stress on multiple variables simultaneously. We then applied this technique retrospectively to identify the most likely set of initiators. Our analyses allowed identification of a unique set of four initiators in the studied intertidal system (a group of algae, sessile invertebrates, a group of herbivores and starfish), which were hypothesized to be the primary drivers of the observed changes in community structure. In addition, a hypothesis was derived about how the perturbation affected these initiators. The hypothesis is that pollution affected negatively the population growth rate of both algae and sessile invertebrates and suppressed the interaction between herbivores and starfish. Our analytic approach, focused on identifying initiators, constitutes an advance towards understanding the mechanisms underlying human-driven ecosystem disruption and permits identifying species that may serve as a focal point for community management and restoration.en_US
Patrocinadordc.description.sponsorshipFONDECYT 1090132/2009en_US
Type of licensedc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
Link to Licensedc.rights.uri*
Keywordsdc.subjectComplex systemsen_US
Keywordsdc.subjectCommunity ecotoxicologyen_US
Keywordsdc.subjectCommunity matrixen_US
Keywordsdc.subjectPress perturbation Inten_US
Keywordsdc.subjectLoop analysisen_US
Keywordsdc.subjectPress perturbationen_US
Títulodc.titleRetrospective qualitative analysis of ecological networks under environmental perturbation: a copper-polluted intertidal community as a case studyen_US
Document typedc.typeArtículo de revista

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Atribución-NoComercial-SinDerivadas 3.0 Chile
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Chile