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dc.contributor.authorMukherjee, J. R.
dc.contributor.authorJones, T. A.
dc.contributor.authorAdler, P. B.
dc.contributor.authorMonaco, T. A.
dc.date.accessioned2021-03-08T18:36:01Z
dc.date.available2021-03-08T18:36:01Z
dc.date.issued2015-11
dc.identifier.citationMukherjee, J. R., Jones, T. A., Adler, P. B., & Monaco, T. A. (2015). Contrasting Mechanisms of Recovery from Defoliation in Two Intermountain-Native Bunchgrasses. Rangeland Ecology & Management, 68(6), 485–493.
dc.identifier.issn0022-409x
dc.identifier.doi10.1016/j.rama.2015.07.011
dc.identifier.urihttp://hdl.handle.net/10150/656895
dc.description.abstractGrazing tolerance of dominant native species may determine the fate of rangeland ecosystems, and using native plant populations with good grazing tolerance in restoration seedings may improve ecosystem resilience, especially when domestic herbivores are present. We examined interspecific and intraspecific differences in shoot biomass and defoliation tolerance for two semiarid, perennial cool-season bunchgrasses native to the Intermountain West, USA, Pseudoroegneria spicata and Elymus wawawaiensis, on the basis of four functional traits (specific leaf area [SLA], plant basal area, tiller number, and tiller mass). We applied two treatments, control and boot-defoliation, where the latter included defoliation at the early-reproductive ("boot") stage, the phenological stage most vulnerable to herbivory, while the control treatment did not. We tested two contrasting hypotheses (i.e., that boot-defoliation tolerance is increased through either increases in SLA or through more favorable tiller demography). For shoot biomass, both grasses were less productive under the boot-defoliation treatment than for the control, but E. wawawaiensis displayed higher boot-defoliation tolerance than P. spicata. Interpopulation variation occurred in all four functional traits for P. spicata, but there were no such variation for E. wawawaiensis. The tiller demography hypothesis better explained boot-defoliation tolerance in both species, and neither SLA nor plant basal area was correlated with shoot biomass for either treatment. Of the traits measured, high tiller number served as the primary mechanism for shoot biomass and boot-defoliation tolerance in P. spicata, while tiller number and tiller mass were both important predictors of both shoot biomass and boot-defoliation tolerance. © 2015 Society for Range Management. Published by Elsevier Inc. All rights reserved.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectclipping tolerance
dc.subjectElymus wawawaiensis
dc.subjectPseudoroegneria spicata
dc.subjectSLA
dc.subjecttiller number
dc.subjecttiming of defoliation
dc.titleContrasting Mechanisms of Recovery from Defoliation in Two Intermountain-Native Bunchgrasses
dc.typeArticle
dc.typetext
dc.identifier.journalRangeland Ecology & Management
dc.description.collectioninformationThe Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.source.journaltitleRangeland Ecology & Management
dc.source.volume68
dc.source.issue6
dc.source.beginpage485
dc.source.endpage493
refterms.dateFOA2021-03-08T18:36:01Z


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