Spatial Risk Assessment of Invasive Species Impacts on Native Species in Nebraska

This project focuses on assessments of the risk to native species from non-native invasive species in Nebraska. It will also conduct community-level risk assessments to evaluate the risk faced by those communities identified as “at-risk” by the Nebraska Game and Parks Commission Legacy Project. Modeling of both stressors and targets will be based on species-habitat associations with the use of relevant auxiliary data, as per Gap Analysis protocols. Several different GIS land covers are available for the State of Nebraska and we will likely have to make use of several of them, as all have different strengths and weaknesses. Where possible, we will utilize the methods described in Allen et al. (2001) to incorporate minimum viable population modeling based on minimum critical areas for vertebrate models. Products will include spatial models of stressors and targets, models of spatial overlap, hazard indices, and relative risk indices for each target. Stressors (invasive species on the Nebraska Watch List) and targets have been identified and modeling is currently underway.


This project conducts spatially-based risk analyses for species and communities identified as at-risk by the Nebraska Legacy Project. Stressors are invasive species on the Nebraska noxious weed watch list. Results may provide guidance for invasive species surveillance and monitoring, and prioritize research and management needs regarding specifics of impacts.

Current Status

This project is complete with results compiled into a master's thesis.

Principal Investigator(s)
-Craig R. Allen, NE CFWRU
Graduate Student(s)
-Thad Miller
-Nebraska Game and Parks Commission, and the U.S. Geological Survey