Invasives - Plants, Pests, and Pathogens

Invasive species are a rapidly expanding threat to wildand ecosystems throughout the Western United States. Invasive species are defined as those that are nonnative (or alien) to the invaded ecosystem and whose introduction is likely to result in economic or environmental harm, or reduce environmental integrity. Human activities are the primary spread agent for invasive species.

We have also included native outbreaks of plants, pathogens, and insects within their natural range that have reached deleterious levels. Native species outbreaks at unprecedented levels of attack are increasingly common and have likely occurred due to increases in summer temperature (increasing season length and the number of potential generations per year), increases in winter minimum temperature (reducing winter mortality), and more severe host drought stress (increasing production and release of volatile organic compound attractants).

WWETAC supports reviews to identify gaps in knowledge, research to fill knowledge gaps, syntheses of research and information, modeling of effects and interactions, vulnerability assessments, assesment tool development and communication of information to land and resource managers.


WWETAC has a number of projects concerning invasive plants, pests, and pathogens. Current projects include:

Past projects include: