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2006

Environmental Sciences

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Non-indigenous species

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When Landscaping Goes Bad: The Incipient Invasion Of Mahonia Bealei In The Southeastern United States, Craig R. Allen, Ahjond S. Garmestani, Jill A. Labram, Amanda E. Peck, Luanna B. Prevost Jan 2006

When Landscaping Goes Bad: The Incipient Invasion Of Mahonia Bealei In The Southeastern United States, Craig R. Allen, Ahjond S. Garmestani, Jill A. Labram, Amanda E. Peck, Luanna B. Prevost

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Woodlots are forest islands embedded within an urban matrix, and often represent the only natural areas remaining in suburban areas. Woodlots represent critical conservation areas for native plants, and are important habitat for wildlife in urban areas. Invasion by non-indigenous (NIS) plants can alter ecological structure and function, and may be especially severe in remnant forests where NIS propagule pressure is high. Woody shrubs in the Family Berberidaceae have been well documented as invaders of the forest–urban matrix in North America. Mahonia bealei (Berberidaceae) is a clonal shrub native to China, and is a popular ornamental in the Southeastern United …


A Framework For Spatial Risk Assessments: Potential Impacts Of Nonindigenous Invasive Species On Native Species, Craig R. Allen, Alan R, Johnson, Leslie Parris Jan 2006

A Framework For Spatial Risk Assessments: Potential Impacts Of Nonindigenous Invasive Species On Native Species, Craig R. Allen, Alan R, Johnson, Leslie Parris

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Many populations of wild animals and plants are declining and face increasing threats from habitat fragmentation and loss as well as exposure to stressors ranging from toxicants to diseases to invasive nonindigenous species. We describe and demonstrate a spatially explicit ecological risk assessment that allows for the incorporation of a broad array of information that may influence the distribution of an invasive species, toxicants, or other stressors, and the incorporation of landscape variables that may influence the spread of a species or substances. The first step in our analyses is to develop species models and quantify spatial overlap between stressor …