Using native annual plants to restore post-fire habitats in western North America
Christopher M. Herron A , Jayne L. Jonas B , Paul J. Meiman B and Mark W. Paschke B C
+ Author Affiliations
- Author Affiliations
A Center for Environmental Management of Military Lands, Colorado State University, Fort Collins, CO 80523-1490, USA.
B Department of Forest and Rangeland Stewardship, Colorado State University, Fort Collins, CO 80523-1472, USA.
C Corresponding author. Email: mark.paschke@colostate.edu
International Journal of Wildland Fire 22(6) 815-821 https://doi.org/10.1071/WF11179
Submitted: 20 December 2011 Accepted: 19 January 2013 Published: 16 May 2013
Abstract
Increasing fire frequencies and uncharacteristic severe fires have created a need for improved restoration methods across rangelands in western North America. Traditional restoration seed mixtures of native perennial mid- to late-seral plant species may not be suitable for intensely burned sites that have been returned to an early-seral condition. Under such conditions, native annual plant species are likely to be more successful at becoming established and competing with exotic annual plant species, such as Bromus tectorum L., for resources. We used a field study in Colorado and Idaho, USA, to test the hypothesis that native annual plant species are better suited to post-fire restoration efforts compared with perennial plant species that are commonly used in traditional seed mixtures. Replicated test plots at three post-fire sites were assigned one of four treatments: (1) native annual seed mixture, (2) standard perennial seed mixture, (3) combination of annual and perennial and (4) an unseeded control. Seeding native annuals with perennials resulted in a slight reduction in exotic plant cover, suggesting that it is potentially beneficial to include native annual plant species in restoration seed mixtures.
Additional keywords: Bromus tectorum, cheatgrass, pinyon–juniper, reseeding, restoration, sagebrush, seed bank, wildfire.
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