Patterns in soil fertility and root herbivory interact to influence fine-root dynamics

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dc.contributorVirginia Techen
dc.contributor.authorStevens, Glen N.en
dc.contributor.authorJones, R. H.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2014-03-11en
dc.date.accessioned2014-03-27T13:06:04Zen
dc.date.available2014-03-27T13:06:04Zen
dc.date.issued2006-03en
dc.description.abstractFine-scale soil nutrient enrichment typically stimulates root growth, but it may also increase root herbivory, resulting in trade-offs for plant species and potentially influencing carbon cycling patterns. We used root ingrowth cores to investigate the effects of microsite fertility and root herbivory on root biomass in an aggrading upland forest in the coastal plain of South Carolina, USA. Treatments were randomly assigned to cores from a factorial combination of fertilizer and insecticide. Soil, soil fauna, and roots were removed from the cores at the end of the experiment (8-9 mo), and roots were separated at harvest into three diameter classes. Each diameter class responded differently to fertilizer and insecticide treatments. The finest roots (< 1.0 mm diameter), which comprised well over half of all root biomass, were the only ones to respond significantly to both treatments, increasing when fertilizer and when insecticide were added (each P < 0.0001), with maximum biomass found where the treatments were combined (interaction term significant, P < 0.001). These results Suggest that root-feeding insects have a strong influence on root standing crop with stronger herbivore impacts on finer roots and within more fertile microsites. Thus, increased vulnerability to root herbivory is a potentially significant,cost of root foraging in nutrient-rich patches.en
dc.description.sponsorshipNational Science Foundation Grant DEB-0308847en
dc.description.sponsorshipVirginia Tech Graduate Student Assemblyen
dc.description.sponsorshipVirginia Tech Department of Biological Sciencesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGlen N. Stevens and Robert H. Jones 2006. PATTERNS IN SOIL FERTILITY AND ROOT HERBIVORY INTERACT TO INFLUENCE FINE-ROOT DYNAMICS. Ecology 87:616-624. http://dx.doi.org/10.1890/05-0809en
dc.identifier.doihttps://doi.org/10.1890/05-0809en
dc.identifier.issn0012-9658en
dc.identifier.urihttp://hdl.handle.net/10919/46836en
dc.identifier.urlhttp://www.esajournals.org/doi/pdf/10.1890/05-0809en
dc.language.isoenen
dc.publisherEcological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.holderEcological Society of Americaen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectelateridaeen
dc.subjectheterogeneityen
dc.subjectroot foragingen
dc.subjectroot ingrowth coreen
dc.subjectscarabaeidaeen
dc.subjectearly plant successionen
dc.subjectbottom-up forcesen
dc.subjectinsect herbivoryen
dc.subjecttop-downen
dc.subjectnutrient heterogeneityen
dc.subjectcommunity structureen
dc.subjecttallgrass prairieen
dc.subjectspatialen
dc.subjectvariationen
dc.subjectunited-statesen
dc.subjectresponsesen
dc.titlePatterns in soil fertility and root herbivory interact to influence fine-root dynamicsen
dc.title.serialEcologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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