A5016508443- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Forest ecology and management
- Tree-ring climate responses
- Forest Management and Policy
- Plant Water Relations and Carbon Dynamics
- Forest Ecology and Biodiversity Studies
- Hernia repair and management
- Landslides and related hazards
- Gastric Cancer Management and Outcomes
- Esophageal Cancer Research and Treatment
- Intestinal and Peritoneal Adhesions
- Peatlands and Wetlands Ecology
- Plant and Fungal Interactions Research
- Forest Insect Ecology and Management
- Remote Sensing in Agriculture
- Satellite Image Processing and Photogrammetry
- Pelvic and Acetabular Injuries
- Lichen and fungal ecology
- Geology and Paleoclimatology Research
- Body Contouring and Surgery
- Essential Oils and Antimicrobial Activity
- Myofascial pain diagnosis and treatment
- Testicular diseases and treatments
Creighton University
2019-2025
Western Wildland Environmental Threat Assessment Center
2021-2024
Pacific Northwest Research Station
2021-2024
US Forest Service
2022-2023
International Union for Conservation of Nature
2023
Wildlands Network
2021
Humboldt State University
2018-2020
Oregon State University
2015-2018
Southern Research Station
2016
University of Georgia
2005-2006
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...
Abstract Fire is an important disturbance in many forest landscapes, but there heightened concern regarding recent wildfire activity western North America. Several regional‐scale studies focus on high‐severity fire, a comprehensive examination at all levels of burn severity (i.e., low, moderate, and high) needed to inform our understanding the ecological effects contemporary fires how they vary among vegetation zones sub‐regional scales. We integrate Landsat time series data with field...
Abstract Wildfires devastated communities in Oregon and Washington September 2020, burning almost as much forest west of the Cascade Mountain crest (“the westside”) 2 weeks (~340,000 ha) previous five decades (~406,00 ha). Unlike dry forests interior western United States, temperate rain Pacific Northwest have experienced limited recent fire activity, debates surrounding what drove 2020 fires, management strategies to adapt similar future events, necessitate a scientific evaluation fires. We...
Abstract As wildfire becomes increasingly frequent, many serotinous plant populations risk local extirpation if fire recurs prior to sufficient seed accumulation in the canopy (i.e., “immaturity risk”). Following two 2018 wildfires northwestern California, we studied viability, cone production, and postfire regeneration of a conifer, knobcone pine ( Pinus attenuata ), with stand ages (time since fire) ranging from 6 79 years. Cone density per tree was more strongly associated diameter than...
Summary We fitted species‐area curves to the power function and examined changes in parameters quantify species richness of all plants together, trees only non‐trees over five scales magnitude (0.01 m 2 400 ) after a wildfire Linville Gorge Wilderness Area, North Carolina, USA. Increases together occurred fire at increased as scale increased. However, lack change slopes ( z ‐values) indicates that proportional were independent observation below . Changes predominantly driven by immigration,...
Despite its importance to biodiversity and ecosystem function, patterns drivers of regional scale variation in forest structure development are poorly understood. We characterize structural variation, create a hierarchical classification structure, develop an empirically based framework for conceptualizing from 11,091 plots across 25 million ha all ownerships Oregon, Washington, inland Northern California, USA. A single component related live tree biomass accounted almost half the principal...
Abstract Background Neoadjuvant Chemoradiation (nCRT) has been shown to improve survival in patients with Esophageal Adenocarcinoma (EAC). The objective of this study is assess the patient characteristics associated tumor downstaging a large national database. Additionally, we evaluated surgical approach and change clinical versus pathological staging as predictors survival. Methods Using 2010–2020 National Cancer Database, identified 6,400 stage 1B 4A EAC who received nCRT underwent...
Abstract Question: Does the overstorey of pine savannas influence plant species biodiversity in ground cover? Location: Camp Whispering Pines (30°41’N; 90°29’W), eastern Louisiana (USA). Methods: We used ecologically sensitive restoration logging to remove patches Pinus palustris (longleaf pine) a second‐growth loess plain savanna managed using frequent lightning season fires. Five years later, we measured numbers vascular and transmitted light replicated 100‐m 2 plots. Treatments involved...
Question: Does the overstorey of pine savannas influence plant species biodiversity in ground cover? Location: Camp Whispering Pines (30°41'N; 90°29'W), eastern Louisiana (USA). Methods: We used ecologically sensitive restoration logging to remove patches Pinus palustris (longleaf pine) a second-growth loess plain savanna managed using frequent lightning season fires. Five years later, we measured numbers vascular and transmitted light replicated 100-m2 plots. Treatments involved three...
Abstract Wildfires pose a unique challenge to conservation in fire‐prone regions, yet few studies quantify the cumulative effects of wildfires on forest dynamics (i.e., changes structural conditions) across landscape and regional scales. We assessed contribution wildfire eastern Cascade Mountains, USA from 1985 2010 using imputed maps structure tree size canopy cover) remotely sensed burn severity maps. addressed three questions: (1) How do differ between region as whole unburned portion...
Abstract Context Several plant traits are associated with resistance to fire, thus fire-resistant species may give rise more landscapes. However, up-scaling from landscape- and regional-scale fire effects remains a challenge. Objectives We test two hypotheses: (1) forests composed of experience lower severity than less species; (2) wildfires affecting greater smaller patches high-severity fire. Methods used predictive map existing forest types (major tree dominating composition) trait-based...
Abstract Fire is a critical ecological process to the forests of Southern Appalachians. Where fire was excluded from forest types that historically burned frequently, unanticipated changes can occur when reintroduced. For example, development new fuel characteristics change patterns mortality and associated responses. To test effects delayed (mortality initiated by occurs subsequent year) in Appalachians, USA, we developed fire‐effects model using both field studies remote sensing. We then...
Abstract The natural range of variation (NRV) is an important reference for ecosystem management, but has been scarcely quantified forest landscapes driven by infrequent, severe disturbances. Extreme events such as large, stand‐replacing wildfires at multi‐century intervals are typical these regimes; however, data on their characteristics inherently scarce, and, land commonly considered too large and unpredictable to integrate into planning efforts (the proverbial “Black Swan”). Here, we...
Abstract Background Despite recent advances in understanding the drivers of tree-level delayed mortality, we lack a method for mapping mortality at landscape and regional scales. Consequently, extent, magnitude, effects on post-fire patterns burn severity are unknown. We introduce remote sensing approach based decline normalized ratio (NBR). NBR is defined as change between first measurement minimum value up to 5 years each pixel. validate with high-resolution aerial photography from six...
The infrequent occurrence of large wildfires in the southern Appalachian Mountains over last several decades has offered few opportunities to study their impacts. From 2000 2008, five burned a portion area and surrounding Linville Gorge Wilderness North Carolina. Areas were either once or twice. response acid cove thermic oak plant communities (structure, cover, richness, diversity) was measured 78 vegetation monitoring plots, established 1992 remeasured 2010–11. Fire altered forest...