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Soil fertilization does not alter plant architectural effects on arthropod communities

Journal of Plant Ecology 2017年第5期10卷 800-807页

作者： M.Noelia Barrios-Garcia Mariano A.Rodriguez-Cabal Jennifer A.Rudgers Gregory M.Crutsinger CONICET CENAC-APNFagnano 244BarilocheRio Negro CP.8400Argentina Grupo de Ecología de Invasiones INIBIOMA-CONICETUniversidad Nacional del ComahueAv.de los Pioneros 2350BarilocheRio Negro CP.8400Argentina Department of Biology University of New MexicoCastetter Hall 286AlbuquerqueNM 87131USA Department of Zoology University of British Columbia#4200-6270 University Blvd.VancouverBritish Columbia V6T 1Z4Canada

Aims While a growing number of studies have demonstrated the impor-tance of intraspecific differences within plant species on associ-ated arthropod communities,little is known regarding the relative strength of these effects compared to environmental *** this study,we examined whether intraspecific plant differences and nutrient fertilization interact to shape the arthropod community of a dominant coastal shrub,baccharis pilularis(coyote bush).Methods We overlaid a fertilization treatment on a 12-year-old common garden experiment planted with erect and prostrate architectural morphs of baccharis in california,*** collect the associated arthropod community,we vacuum sampled the crown of each baccharis and identified individuals to species or *** Findings We found that arthropod richness and abundance were 2-to 3-fold greater on prostrate baccharis than on erect morphs,but observed no main effects of fertilizer addition on the over-all arthropod *** responded as strongly as herbivores to plant morph,and both were unaffected by nutrient *** the specialist stem galler,Gnorimoschema bac-charisella,showed an interactive response to plant morph and ***,phosphorous and potassium addition had opposite effects on the two morphs,increasing stem gall abun-dance by 50%on prostrate morphs,but reducing galling by 20%on erect *** architectural complexity of prostrate morphs could be the driving mechanism of differences in arthropod ***,our results demonstrate that communitylevel consequences of intraspecific differences in plants are strong,rather than being context dependent,and are generally maintained under different resource *** growing number of studies showing strong genotype than nutrient effects on associated arthropod communities suggests that this might be a generalized pattern.

关键词： baccharis pilularis community genetics G×E interactions galling insects nutrient fertilization

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