Effects of variable-density thinning on understory diversity and heterogeneity in young Douglas-fir forests /

Bibliographic Details
Main Author:	Aukema, Juliann E.
Corporate Author:	Pacific Northwest Research Station (Portland, Or.)
Other Authors:	Carey, Andrew B.
Format:	Government Document Book
Language:	English
Published:	Portland, OR : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2008]
Series:	Research paper PNW ; 575.
Subjects:	Douglas fir > Thinning > Washington (State) > Pierce County. Forest management > Washington (State) > Pierce County. Forest biodiversity > Washington (State) > Pierce County. Understory plants > Washington (State) > Pierce County. Plant communities > Washington (State) > Pierce County.
Online Access:	PURL http://www.fs.fed.us/pnw/pubs/pnw_rp575.pdf

Description
Abstract:	Nine years after variable-density thinning (VDT) on the Forest Ecosystem Study, we examined low understory vegetation in 60 plots of eight stands (four pairs of VDT and control). We compared native, exotic, ruderal, and nonforest species richness among the stands. We used clustering, ordination, and indicator species analysis to look for distinctive patches of plant associations. Native, exotic, ruderal, and nonforest plant species diversity were higher in VDT stands compared to control stands for both forests. Differentiation of the understory into multiple distinct vegetation patches was not definitive, but there were trends toward greater heterogeneity in VDT stands.
Item Description:	Cover title. "April 2008."
Physical Description:	20 pages : illustrations ; 28 cm. Also available on the World Wide Web.
Bibliography:	Includes bibliographical references (pages 16-20).