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Pinyon pine woodlands are among the most widespread and iconic vegetation types in the western United States and support recreation, resource extraction, grazing, and cultural enrichment. However, severe drought conditions have recently caused dramatic mortality of pinyon pines, creating concern about the long-term impact of increasing aridity on the viability of pinyon woodlands. Ecological transformations, or regime shifts, are rapid reorganizations of an ecosystem’s species composition, governing processes, and functions. The goal of this project is to investigate ecological transformation across the Western U.S, characterize the environmental drivers of these changes in vegetation, and apply those insights...
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Big sagebrush plant communities are important and widespread in western North America and are crucial for meeting long-term conservation goals for greater sage-grouse and other wildlife of conservation concern. Yet wildfire is increasing in the West, turning biodiverse, shrub-based ecosystems dominated by sagebrush into grasslands containing invasive species such as cheatgrass and less overall plant and animal diversity. These transformations negatively impact people and ecosystems by reducing habitat quality for wildlife and the aesthetic value of the landscape. Understanding how sagebrush communities are already responding and will continue to respond to changes in wildfire, invasive species, and climate is...
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Pinyon-juniper woodlands are a major part of western landscapes and are valued for recreational use, cultural resources, watershed protection, and wildlife habitats. These woodlands have been identified by several stakeholders, including natural resource management entities, federal and state agencies, and numerous tribal nations, as important ecosystems that are currently threatened by land treatments, changes in disturbance regimes such as drought and fire, and widespread tree mortality. Currently there exist competing objectives for the management of these systems, including the desire to preserve pinyon-juniper viability as climate conditions continue to shift, as well as the need to track these systems to ensure...
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Pinyon-juniper woodlands are important ecosystems in the western U.S. that provide numerous critical environmental, economic, and cultural benefits. For example, pinyon pines are a significant cultural resource for multiple Native American Tribes and provide necessary habitat for plants and wildlife (including at risk species, such as the pinyon-jay). Despite their importance, stress put on pinyon-juniper woodlands by wildfires and other interacting effects of climate change are causing major population declines of these woodland trees. Such changes to pinyon-juniper woodlands lead to uncertainty for land managers on best practices for protecting these ecosystems from stand replacing fire (where most or all of...
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Ponderosa pine forests are declining and their future persistence is uncertain. Most research on forest declines has focused on the effects of disturbances including wildfire, insect outbreaks, and severe drought on mortality of mature trees. Yet, recent research suggests that ponderosa pine declines may be even more severe as these ecosystems fail to regenerate naturally (i.e. grow from seed to adulthood) in a climate that is becoming increasingly less favorable for juvenile tree survival. For land managers to accurately assess and combat the risk of failed regeneration, it is critical to better understand the many factors supporting regeneration across the diverse habitats where these ecosystems are located. ...
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In the western U.S., rising temperatures and pronounced drought conditions pose significant challenges to public land managers. Widespread declines of multiple plant species have already been observed, providing insight into what the future could look like for vegetation in the region as conditions are projected to become warmer and drier. To understand how vulnerable western ecosystems are to drought, managers need to know which climatic and soil conditions cause habitats to change, and at what rate these changes may occur – important topics on which there is little available data. This project seeks to identify the vulnerability of habitats in the western U.S. to drought. Researchers will compare changes in...
    map background search result map search result map Assessing the Vulnerability of Dryland Ecosystems to Drought in the Western U.S. Ecology and Management of Pinyon-Juniper Woodlands: State of the Science Big Sagebrush Response to Wildfire and Invasive Grasses in the 21st Century Mapping the Risk of Ecological Transformation Across Pinyon Woodlands and the U.S. West Determining Successful Management and Restoration Strategies for Pinyon-Juniper Communities in the Face of Changing Climate and Wildfire Can Management Actions Support Forest Regeneration Across the Diverse Landscapes and Climate Change Futures of the Southwestern U.S.? Determining Successful Management and Restoration Strategies for Pinyon-Juniper Communities in the Face of Changing Climate and Wildfire Can Management Actions Support Forest Regeneration Across the Diverse Landscapes and Climate Change Futures of the Southwestern U.S.? Assessing the Vulnerability of Dryland Ecosystems to Drought in the Western U.S. Ecology and Management of Pinyon-Juniper Woodlands: State of the Science Big Sagebrush Response to Wildfire and Invasive Grasses in the 21st Century Mapping the Risk of Ecological Transformation Across Pinyon Woodlands and the U.S. West