alexa Responses of a Sierran Mixed Conifer Understory Plant C
ISSN: 2168-9776

Forest Research: Open Access
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Research Article

Responses of a Sierran Mixed Conifer Understory Plant Community to Over Story Thinning, Slash Mastication, and Prescribed Fire Restoration Treatments

Walker RF*, Swim SL, Fecko RM, Johnson DW and Miller WW

Department of Natural Resources and Environmental Science, University of Nevada, Reno, Nevada, USA

*Corresponding Author:
Walker RF
Department of Natural Resources and Environmental Science
University of Nevada, 1664 North Virginia Street
Reno, NV 89557, USA
Tel: 7757844039
E-mail: [email protected]

Received date: November 18, 2015 Accepted date: January 19, 2016 Published date: January 21, 2016

Citation: Walker R, Swim SL, Fecko RM, Johnson DW, Miller WW (2016) Responses of a Sierran Mixed Conifer Understory Plant Community to Cover Story Thinning, Slash Mastication, and Prescribed Fire Restoration Treatments. Forest Res 5:167. doi:10.4172/2168-9776.1000167

Copyright: © 2016 Walker RF, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Thinning implemented with a cut-to-length harvesting system coupled with on-site slash mastication and redistribution and followed by prescribed under burning were assessed for their impacts on the shrub understory and natural regeneration in an uneven-aged Sierra Nevada mixed conifer stand. Initial suppression of the cover and weight of huckleberry oak, the most prevalent ground cover species, by the combined thinning and mastication operations and those of prostrate ceanothus by the under burn were followed by a pronounced resurgence in abundance for both species in burned stand portions, particularly where thinning had preceded the fire. White fir was most prevalent initially among species represented in the seedling size class of natural regeneration and became predominant thereafter while this species dominated the sapling class throughout the study. White fir seedling establishment was enhanced where the mechanized operations were excluded, and especially so where fire was as well, and such was also the case for incense-cedar initially but its seedling abundance declined precipitously as the study progressed. White fir saplings were most numerous in the unthinned stand subunit but the under burn proved lethal to many of them therein. Jeffrey and sugar pine were little represented among seedlings and absent altogether among saplings.


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