|Parker-Williams, Amy - UNIV. OF WYOMING|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: February 10, 2002
Publication Date: March 7, 2002
Citation: Parker-Williams, A., Hunt, E.R. 2002. Using AVIRIS to map invasive plants on rangelands: Leafy spurge in northeastern Wyoming [abstract]. In: 2002 AVIRIS Earth Science and Applications Workshop Abstracts, March 5-8, 2002, Pasadena, California. Technical Abstract: Leafy spurge is an adventive, perennial weed that infests approximately 1.2 million hectares of land and causes severe environmental and economic impacts on rangelands. During 1999, AVIRIS imagery was acquired in northeastern Wyoming near Devils Tower National Monument. Mixed tuned matched filtering (MTMF) was used to estimate leafy spurge cover in three topographic positions and two land cover types. For all sites, performance of MTMF was good (R2 = 0.69) with better performance in prairie sites (R2 = 0.79) and poorer performance on woodland sites (R2 = 0.57). For woodland sites, understory leafy spurge was detected in all plots, in spite of the problems with canopy overstory and shadows between crowns.