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Occurrence of non-native invasive plants: The role of anthropogenic features: Chapter 10

By:
, ORCID iD , ORCID iD , , and ORCID iD
Edited by:
Steven E. Hanser ORCID iD , Matthias Leu , Steven T. Knick ORCID iD , and Cameron L. Aldridge ORCID iD

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Abstract

The invasion of non-native plants in the Wyoming Basins Ecoregional Assessment (WBEA) area is a major economic and ecological stress, with invasions thought to be hastened by energy developments. Given the potential impacts of nonnative invasive plants and the rapid changes in land use in the WBEA, broad-scale assessments and predictive models of nonnative invasive plant distribution are needed. Using this information, the current extent of populations for targeting treatment and monitoring can be identified, the habitat affinities for forecasting where weeds may establish next determined, and the responses to individual human disturbances (such as energy developments) predicted. To address these needs, we conducted vegetation surveys across the WBEA area at 317 individual survey blocks (five plots per survey block) during the summers of 2005 and 2006. Survey blocks were stratified by both human disturbance and habitat productivity; in each of five plots per survey block the occurrence of 23 common nonnative invasive plants was recorded during early and late season surveys. Here, we report on the four most common invasive plants, crested wheatgrass (Agropyron cristatum), cheatgrass (Bromus tectorum), halogeton (Halogeton glomeratus), and Russian thistle (Salsola spp.). Occurrence models were generated for each species using random-effects logistic regression to account for nesting of plots within sample sites. Predictors of occupancy included local habitat, abiotic condition, and distance to anthropogenic features. Although occurrences of all four invasive plants were affected by habitat, abiotic, and anthropogenic factors, cheatgrass and Russian thistle were most strongly associated with anthropogenic disturbance, primarily major roads and energy well sites. We assessed relationships between environmental and anthropogenic predictors and species occurrences to identify the major factors affecting current species distribution, examined shape of the response in occurrence in relation to proximity to individual anthropogenic disturbances, and provided spatial predictions of the locations where invasive plants are most likely to occur.

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Additional publication details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Occurrence of non-native invasive plants: The role of anthropogenic features: Chapter 10
Chapter:
10
ISBN:
978-0-615-55530-0
Year Published:
2011
Language:
English
Publisher:
Allen Press
Publisher location:
Lawrence, Kansas
Contributing office(s):
Forest and Rangeland Ecosystem Science Center, Fort Collins Science Center
Description:
30 p.
Larger Work Type:
Book
Larger Work Subtype:
Monograph
Larger Work Title:
Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
First page:
357
Last page:
386
Country:
United States
State:
Wyoming
Online Only (Y/N):
N
Additional Online Files (Y/N):
N