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Debra A Guenther
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Cynthia A Villa
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We present an approach to quantitatively assess nonnative plant invasions at landscape scales from both habitat and species perspectives. Our case study included 34 nonnative species found in 142 plots (0.1 ha) in 14 vegeta- tion types within the Grand Staircase–Escalante National Monument, Utah. A plot invasion index, based on nonnative species richness and cover, showed that only 16 of 142 plots were heavily invaded. A species invasive index, based on frequency, cover, and number of vegetation types invaded, showed that only 7 of 34 plant species were highly invasive. Multiple regressions using habitat characteristics (moisture index, elevation, soil P, native species richness, maximum crust development class,...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Bromus tectorum,
Grand Staircase–Escalante National Monument,
Tamarix spp.,
Western North American Naturalist,
biological soil crusts, All tags...
cheatgrass,
exotic species,
invasive species,
modified-Whittaker plots,
multiscale sampling,
nonnative species,
tamarisk, Fewer tags
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