Photograph of cheatgrass by Fort Collins Science Center biologist Janet Prevéy (USGS).
Janet Prevéy, PhD
Janet Prevéy is a Biologist at the Fort Collins Science Center, whose research focuses on how environmental changes affect vegetation dynamics and phenology across different spatial and temporal scales.
Janet Prevéy is a global change ecologist who synthesizes information from reciprocal transplant studies, manipulative experiments, community scientists, satellite imagery, and long-term monitoring plots to explore how environmental changes influence vegetation dynamics and phenology across different spatial and temporal scales. She seeks to understand how climatic conditions, genetic adaptations, and biotic interactions can differentially influence species’ phenological responses, and how these differences can ultimately determine community and ecosystem responses to environmental change.
Science and Products
Predicting the phenology of invasive grasses under a changing climate to inform mapping and management
Cheatgrass, an invasive annual grass, reduces ecosystem productivity, negatively impacts biodiversity, and is increasingly problematic in higher elevation ecosystems with climate change. Cheatgrass phenology (that is, the timing of yearly growth and lifespan) varies greatly with elevation, climate, and weather from year to year, which can make management planning difficult and reduce the ability...
Predicting risk of annual grass invasion following fire in sagebrush steppe and rangeland ecosystems
This project analyzes on-the-ground plant monitoring data across sagebrush and rangeland ecosystems to examine how fire, climate, topography, and plant communities influence the success of invasive annual grasses after fires.
INHABIT: A web-based decision support tool for invasive plant species habitat visualization and assessment across the contiguous United States
Many managers are hampered by the scope of the invasive species problem compared to their available resources. Habitat suitability models of invaders can help fill this resource gap, helping with activities such as watch list compilation and targeted surveillance and eradication efforts.
Climate Impacts on the Locations and Availability of Traditional Food Sources from Native Northwestern Shrubs
Fruit-producing shrubs such as huckleberries, salal, and hazelnut are an important component of social history and traditional tribal diets in the Pacific Northwest. The fruits of these shrubs are also an important food source for foraging wildlife and pollinators, and serve as the basis for both non-tribal harvesting and small-scale commercial operations. Among land managers and tribes, there is
Cheatgrass
Photograph of cheatgrass by Fort Collins Science Center biologist Janet Prevéy (USGS).
USGS researcher Janet Prevey deploys timelapse camera to capture cheatgrass phenology
We are deploying timelapse cameras across elevational and latitudinal gradients to capture variation in cheatgrass phenology.
We are deploying timelapse cameras across elevational and latitudinal gradients to capture variation in cheatgrass phenology.
Timelapse camera imagery of cheatgrass growing over time
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Landscape after a fire
Burned area following the Mullen fire in 2020 in southern Wyoming. Invasive annual grasses may be becoming more abundant at higher elevations after disturbances like fire, and tools are needed to accurately map potential invasions across topographic gradients. Photo by Janet Prevéy (USGS).
Burned area following the Mullen fire in 2020 in southern Wyoming. Invasive annual grasses may be becoming more abundant at higher elevations after disturbances like fire, and tools are needed to accurately map potential invasions across topographic gradients. Photo by Janet Prevéy (USGS).
Science and Products
Predicting the phenology of invasive grasses under a changing climate to inform mapping and management
Cheatgrass, an invasive annual grass, reduces ecosystem productivity, negatively impacts biodiversity, and is increasingly problematic in higher elevation ecosystems with climate change. Cheatgrass phenology (that is, the timing of yearly growth and lifespan) varies greatly with elevation, climate, and weather from year to year, which can make management planning difficult and reduce the ability...
Predicting risk of annual grass invasion following fire in sagebrush steppe and rangeland ecosystems
This project analyzes on-the-ground plant monitoring data across sagebrush and rangeland ecosystems to examine how fire, climate, topography, and plant communities influence the success of invasive annual grasses after fires.
INHABIT: A web-based decision support tool for invasive plant species habitat visualization and assessment across the contiguous United States
Many managers are hampered by the scope of the invasive species problem compared to their available resources. Habitat suitability models of invaders can help fill this resource gap, helping with activities such as watch list compilation and targeted surveillance and eradication efforts.
Climate Impacts on the Locations and Availability of Traditional Food Sources from Native Northwestern Shrubs
Fruit-producing shrubs such as huckleberries, salal, and hazelnut are an important component of social history and traditional tribal diets in the Pacific Northwest. The fruits of these shrubs are also an important food source for foraging wildlife and pollinators, and serve as the basis for both non-tribal harvesting and small-scale commercial operations. Among land managers and tribes, there is
Cheatgrass
Photograph of cheatgrass by Fort Collins Science Center biologist Janet Prevéy (USGS).
Photograph of cheatgrass by Fort Collins Science Center biologist Janet Prevéy (USGS).
USGS researcher Janet Prevey deploys timelapse camera to capture cheatgrass phenology
We are deploying timelapse cameras across elevational and latitudinal gradients to capture variation in cheatgrass phenology.
We are deploying timelapse cameras across elevational and latitudinal gradients to capture variation in cheatgrass phenology.
Timelapse camera imagery of cheatgrass growing over time
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Timelapse camera imagery of cheatgrass growing over time after the Mullen fire in southern Wyoming. These images provide precise dates of green-up, flowering, and senescence of cheatgrass which can be paired with local climate data to create phenological predictions.
Landscape after a fire
Burned area following the Mullen fire in 2020 in southern Wyoming. Invasive annual grasses may be becoming more abundant at higher elevations after disturbances like fire, and tools are needed to accurately map potential invasions across topographic gradients. Photo by Janet Prevéy (USGS).
Burned area following the Mullen fire in 2020 in southern Wyoming. Invasive annual grasses may be becoming more abundant at higher elevations after disturbances like fire, and tools are needed to accurately map potential invasions across topographic gradients. Photo by Janet Prevéy (USGS).