Ventenata Invasion in the Blue Mountains Ecoregion

Exotic plant invasions are a growing challenge to ecosystem management, and are particularly dramatic when they alter disturbance regimes beyond the range of natural variation. A relatively new invasive annual grass, Ventenata dubia thrives at higher elevations, threatening native forest biodiversity and creating ecosystem-level changes. We are conducting landscape scale research focused on the Blue Mountain Ecoregion in the Pacific Northwest to examine the extent of ventenata invasion and associated ecosystem change. This project will examine how fuels, fire regimes, and fire effects might shift across the region, and how these changes might affect management. This project will depict alternative scenarios of ecosystem change associated with future climate change and management actions.


One of our first tasks is to develop a ventenata occurrence map using existing and new spatial data, and then model the occurrence of ventenata in the Blue Mountain Ecoregion (BME) using remoted sensed and other ancillary information.


How You Can Help With Mapping Efforts

In order to map ventenata across the BME, we are seeking collaboration with weed control managers, biologists, ecologists, natural resource professionals, fire and fuel staff, students, land managers and others to collect locations of ventenata and basic site information when they visit sites as part of their normal work routines. To get started, check out our mapping tools.


Locations and site information can be collected in the field data with a mobile app (built in ESRI’s Survey123) or with a basic GPS unit and paper forms. The process should not take more than 5 minutes per location. Note that this app can be used to collect occurrence and abundance data for ANY species of interest and local units may want to use this process to collect data on other invasives or species of interest. 

Ventenata occurrence map

Ventenata Occurrence in the BME

We have developed an initial ventenata occurrence map after compiling all known existing data with new spatial data collected in 2017 across the Blue Mountain Ecoregion. This is a work in progress! We will add new information as it becomes available and update the map. If you have ventenata occurrence data please contact us!


JFSP Project ID: 16-1-01-21