An Integrated Framework To Improve The Concept Of Resource Specialisation.

dc.creatorJorge, Leonardo R
dc.creatorPrado, Paulo I
dc.creatorAlmeida-Neto, Mário
dc.creatorLewinsohn, Thomas M
dc.date2014-Nov
dc.date2015-11-27T13:43:13Z
dc.date2015-11-27T13:43:13Z
dc.date.accessioned2018-03-29T01:21:48Z
dc.date.available2018-03-29T01:21:48Z
dc.identifierEcology Letters. v. 17, n. 11, p. 1341-50, 2014-Nov.
dc.identifier1461-0248
dc.identifier10.1111/ele.12347
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/25168335
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/201668
dc.identifier25168335
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1301901
dc.descriptionResource specialisation, although a fundamental component of ecological theory, is employed in disparate ways. Most definitions derive from simple counts of resource species. We build on recent advances in ecophylogenetics and null model analysis to propose a concept of specialisation that comprises affinities among resources as well as their co-occurrence with consumers. In the distance-based specialisation index (DSI), specialisation is measured as relatedness (phylogenetic or otherwise) of resources, scaled by the null expectation of random use of locally available resources. Thus, specialists use significantly clustered sets of resources, whereas generalists use over-dispersed resources. Intermediate species are classed as indiscriminate consumers. The effectiveness of this approach was assessed with differentially restricted null models, applied to a data set of 168 herbivorous insect species and their hosts. Incorporation of plant relatedness and relative abundance greatly improved specialisation measures compared to taxon counts or simpler null models, which overestimate the fraction of specialists, a problem compounded by insufficient sampling effort. This framework disambiguates the concept of specialisation with an explicit measure applicable to any mode of affinity among resource classes, and is also linked to ecological and evolutionary processes. This will enable a more rigorous deployment of ecological specialisation in empirical and theoretical studies.
dc.description17
dc.description1341-50
dc.languageeng
dc.relationEcology Letters
dc.relationEcol. Lett.
dc.rightsfechado
dc.rights© 2014 John Wiley & Sons Ltd/CNRS.
dc.sourcePubMed
dc.subjectAnimals
dc.subjectBiological Evolution
dc.subjectEcology
dc.subjectEcosystem
dc.subjectHerbivory
dc.subjectInsects
dc.subjectModels, Theoretical
dc.subjectPhylogeny
dc.subjectPlants
dc.subjectDistance-based Specialisation Index
dc.subjectFeeding Niche
dc.subjectNull Model
dc.subjectPhytophagous Insects
dc.subjectSpecies Interactions
dc.titleAn Integrated Framework To Improve The Concept Of Resource Specialisation.
dc.typeArtículos de revistas


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