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dc.contributor.authorTaylor, Kimberly T.
dc.contributor.authorMaxwell, Bruce D.
dc.contributor.authorMcWethy, David B.
dc.contributor.authorPauchard, Anibal
dc.contributor.authorNunez, Martin A.
dc.contributor.authorWhitlock, Cathy
dc.date.accessioned2017-08-16T15:50:06Z
dc.date.available2017-08-16T15:50:06Z
dc.date.issued2017-03
dc.identifier.citationTaylor, Kimberley T. , Bruce D. Maxwell, David B. McWethy, Anibal Pauchard, Martin A. Nunez, and Cathy Whitlock. "Pinus contorta invasions increase wildfire fuel loads and may create a positive feedback with fire." Ecology 98, no. 3 (March 2017): 678-687. https://dx.doi.org/10.1002/ecy.1673.en_US
dc.identifier.issn0012-9658
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/13526
dc.description.abstractInvasive plant species that have the potential to alter fire regimes have significant impacts on native ecosystems. Concern that pine invasions in the Southern Hemisphere will increase fire activity and severity and subsequently promote further pine invasion prompted us to examine the potential for feedbacks between Pinus contorta invasions and fire in Patagonia and New Zealand. We determined how fuel loads and fire effects were altered by P. contorta invasion. We also examined post-fire plant communities across invasion gradients at a subset of sites to assess how invasion alters the post-fire vegetation trajectory. We found that fuel loads and soil heating during simulated fire increase with increasing P. contorta invasion age or density at all sites. However, P. contorta density did not always increase post-fire. In the largest fire, P. contorta density only increased significantly post-fire where the pre-fire P. contorta density was above an invasion threshold. Below this threshold, P. contorta did not dominate after fire and plant communities responded to fire in a similar manner as uninvaded communities. The positive feedback observed at high densities is caused by the accumulation of fuel that in turn results in greater soil heating during fires and high P. contorta density post-fire. Therefore, a positive feedback may form between P. contorta invasions and fire, but only above an invasion density threshold. These results suggest that management of pine invasions before they reach the invasion density threshold is important for reducing fire risk and preventing a transition to an alternate ecosystem state dominated by pines and novel understory plant communities.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.titlePinus contorta invasions increase wildfire fuel loads and may create a positive feedback with fireen_US
dc.typeArticleen_US
mus.citation.extentfirstpage678en_US
mus.citation.extentlastpage687en_US
mus.citation.issue3en_US
mus.citation.journaltitleEcologyen_US
mus.citation.volume98en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.identifier.doi10.1002/ecy.1673en_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEarth Sciences.en_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage4en_US


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