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dc.contributor.authorBrummer, Tyler J.
dc.contributor.authorTaylor, Kimberley T.
dc.contributor.authorRotella, Jay J.
dc.contributor.authorMaxwell, Bruce D.
dc.contributor.authorRew, Lisa J.
dc.contributor.authorLavin, Matthew
dc.identifier.citationBrummer, Tyler J, Kimberley T Taylor, Jay Rotella, Bruce D Maxwell, Lisa J Rew, and Matt Lavin. "Drivers of Bromus tectorum Abundance in the Western North American Sagebrush Steppe." Ecosystems 19, no. 6 (September 2016): 986-1000. DOI:
dc.description.abstractBromus tectorum can transform ecosystems causing negative impacts on the ecological and economic values of sagebrush steppe of the western USA. Although our knowledge of the drivers of the regional distribution of B. tectorum has improved, we have yet to determine the relative importance of climate and local factors causing B. tectorum abundance and impact. To address this, we sampled 555 sites distributed geographically and ecologically throughout the sagebrush steppe. We recorded the canopy cover of B. tectorum, as well as local substrate and vegetation characteristics. Boosted regression tree modeling revealed that climate strongly limits the transformative ability of B. tectorum to a portion of the sagebrush steppe with dry summers (that is, July precipitation <10 mm and the driest annual quarter associated with a mean temperature >15 degrees C) and low native grass canopy cover. This portion includes the Bonneville, Columbia, Lahontan, and lower Snake River basins. These areas are likely to require extreme efforts to reverse B. tectorum transformation. Our predictions, using future climate conditions, suggest that the transformative ability of B. tectorum may not expand geographically and could remain within the same climatically suitable basins. We found B. tectorum in locally disturbed areas within or adjacent to all of our sample sites, but not necessarily within sagebrush steppe vegetation. Conversion of the sagebrush steppe by B. tectorum, therefore, is more likely to occur outside the confines of its current climatically optimal region because of site-specific disturbances, including invasive species control efforts and sagebrush steppe mismanagement, rather than climate change.en_US
dc.description.sponsorshipGonzales-Stoller Surveillance, LLC (GSS-0300-1,100,008); NSF-WildFIRE PIRE (OISE 09667472)en_US
dc.titleDrivers of Bromus tectorum Abundance in the Western North American Sagebrush Steppeen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.contributor.orcidLavin, Matthew|0000-0003-4205-1802en_US

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