A5074121956- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Forest Management and Policy
- Species Distribution and Climate Change
- Landslides and related hazards
- Forest ecology and management
- Fish Ecology and Management Studies
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Land Use and Ecosystem Services
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Water Quality and Pollution Assessment
- Climate change impacts on agriculture
- Remote Sensing and LiDAR Applications
- Genetic and phenotypic traits in livestock
- Data Analysis with R
- Conservation, Biodiversity, and Resource Management
- Wildlife Ecology and Conservation
- Water Quality and Resources Studies
- Peatlands and Wetlands Ecology
- Ecosystem dynamics and resilience
Pacific Northwest Research Station
2015-2024
Pacific Southwest Research Station
2014-2024
US Forest Service
2010-2024
University of Washington
2022
Oak Ridge Institute for Science and Education
2019-2020
Oak Ridge Associated Universities
2018-2020
Tree Fruit Research Laboratory
2009-2012
University of Wisconsin–Madison
2008
Resilience and resistance concepts have broad application to ecology society. is an emergent property that reflects the amount of disruption a system can withstand before its structure or organization uncharacteristically shift. Resistance component resilience. Before advent intensive forest management fire suppression, western North American forests exhibited naturally occurring resilience wildfires other disturbances. Using evidence from ten ecoregions, spanning Canada Mexico, we review...
Implementation of wildfire- and climate-adaptation strategies in seasonally dry forests western North America is impeded by numerous constraints uncertainties. After more than a century resource land use change, some question the need for proactive management, particularly given novel social, ecological, climatic conditions. To address this question, we first provide framework assessing changes landscape conditions fire regimes. Using framework, then evaluate evidence change contemporary...
More than a century of forest and fire management Inland Pacific landscapes has transformed their successional disturbance dynamics. Regional connectivity many terrestrial aquatic habitats is fragmented, flows some ecological physical processes have been altered in space time, the frequency, size intensity disturbances that configure these altered. Current efforts to address impacts yield small footprint comparison wildfires insect outbreaks. Moreover, current projects emphasize thinning...
Forest landscapes across western North America (wNA) have experienced extensive changes over the last two centuries, while climatic warming has become a global reality four decades. Resulting interactions between historical increases in forested area and density recent rapid warming, increasing insect mortality, wildfire burned areas, are now leading to substantial abrupt landscape alterations. These outcomes forcing forest planners managers identify strategies that can modify future...
Increasing fire severity and warmer, drier postfire conditions are making forests in the western United States (West) vulnerable to ecological transformation. Yet, relative importance of interactions between these drivers forest change remain unresolved, particularly over upcoming decades. Here, we assess how interactive impacts changing climate wildfire activity influenced conifer regeneration after 334 wildfires, using a dataset from 10,230 field plots. Our findings highlight declining...
Abstract Following changes in vegetation structure and pattern, along with a changing climate, large wildfire incidence has increased forests throughout the western United States. Given this increase, there is great interest whether fuels treatments previous can alter fire severity patterns wildfires. We assessed relative influence of (including wildfire), weather, vegetation, water balance on fire‐severity Rim Fire 2013. did at three different spatial scales to investigate influences...
Large wildfires (>50,000 ha) are becoming increasingly common in semiarid landscapes of the western United States. Although fuel reduction treatments used to mitigate potential wildfire effects, they can be overwhelmed wind-driven events with extreme fire behavior. We evaluated drivers severity and treatment effectiveness 2014 Carlton Complex, a record-setting complex north-central Washington State. Across varied topography, vegetation, distinct progressions, we combination simultaneous...
Hemlock ( Tsuga canadensis ) plays a unique role in Eastern forests, producing distinctive biogeochemical, habitat, and microclimatic conditions yet has begun potentially irreversible decline due to the invasive hemlock woolly adelgid Adelges tsugae ; HWA) that causes foliar damage, crown loss, mortality of host trees. Understanding regional, landscape, site, stand factors influencing HWA spread impact is critical for predicting future landscape dynamics directing effective management. Using...
Abstract Wildfire ecosystems are thought to be self‐regulated through pattern–process interactions between ignition frequency and location, patterns of burned recovering vegetation. Yet, recent increases in the large wildfires call into question application self‐organization theory landscape resilience. Topography represents a stable bottom‐up template upon which fire interacts as both physical an ecological process. However, it is unclear how topographic control changes geographically...
Abstract Accurate estimates of soil mineral weathering are required for regional critical load (CL) modeling to identify ecosystems at risk the deleterious effects from acidification. Within a correlative framework, we used modeled catchment‐level base cation (BC w ) as response variable key environmental correlates and predict continuous map BC within southern Appalachian Mountain region. More than 50 initial candidate predictor variables were submitted variety conventional machine learning...
Stream-dwelling species in the U.S. southern Appalachian Mountains region are particularly vulnerable to climate change and acidification. The objectives of this study were quantify spatial extent contemporary suitable habitat for acid- thermally sensitive aquatic forecast future loss resulting from expected temperature increases on national forest lands Mountain region. goal was help watershed managers identify assess stream reaches that potentially warming, acidification, or both. To our...
Abstract Following a wildfire, regeneration to forest can take decades centuries and is no longer assured in many western U.S. environments given escalating wildfire severity warming trends. After large fire years, managers prioritize where allocate scarce planting resources, often with limited information on the factors that drive successful establishment. Where occurring, long‐term effects of postfire salvage operations increase uncertainty Here, we collected field data patterns within 13‐...
Abstract Background Climate is a main driver of fire regimes, but recurrent fires provide stabilizing feedbacks at several spatial scales that can limit spread and severity—potentially contributing to form self-regulation. Evaluating the strength these in wildland systems difficult given temporal observation required. Here, we used REBURN model directly examine relative strengths top-down bottom-up drivers over 3000-year simulation period, within 275,000-ha conifer-dominated landscape north...
As disturbances continue to increase in magnitude and severity under climate change, there is an urgency develop climate-informed management solutions resilience help sustain the supply of ecosystem services over long term. Towards this goal, we used analog modeling combined with logic-based conditions assessments quantify future resource stability (FRS) mid-century climate. Analog models were developed for nine projections 1 km cells across California. For each model, assessed at focal cell...