A5077091284- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Landslides and related hazards
- Economic and Environmental Valuation
- Recreation, Leisure, Wilderness Management
- Fire dynamics and safety research
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Forest Management and Policy
- Botany, Ecology, and Taxonomy Studies
- Archaeology and Natural History
- American Environmental and Regional History
- Remote Sensing and LiDAR Applications
- Land Use and Ecosystem Services
- Tree-ring climate responses
- Fire Detection and Safety Systems
- Transportation Planning and Optimization
- Ecology and biodiversity studies
- Plant responses to water stress
- Plant Diversity and Evolution
- Environmental Philosophy and Ethics
- Peatlands and Wetlands Ecology
National Park Service
1980-2021
University of Idaho
2016
United States Geological Survey
2006-2015
Western Ecological Research Center
2006-2015
Rocky Mountain Research (United States)
2004
Rocky Mountain Research Station
2004
Centre for Ecological Research
2004
University of Arizona
2004
Abstract Aim (1) To calculate annual potential evapotranspiration (PET), actual (AET) and climatic water deficit (Deficit) with high spatial resolution; (2) to describe distributions for 17 tree species over a 2300‐m elevation gradient in 3000‐km 2 landscape relative AET Deficit; (3) examine changes Deficit between past ( c. 1700), present (1971–2000) future (2020–49) climatological means derived from proxies, observations projections; (4) infer how the magnitude of changing may contribute...
Wildland fire management has reached a crossroads. Current perspectives are not capable of answering interdisciplinary adaptation and mitigation challenges posed by increases in wildfire risk to human populations the need reintegrate as vital landscape process. Fire science been, continues be, performed isolated "silos," including institutions (e.g., agencies versus universities), organizational structures federal agency mandates local state procedures for responding fire), research foci...
Wildland fire use as a concept had its origin when humans first gained the ability to suppress fires. Some fires were suppressed and others allowed burn based on human values objectives. Native Americans Euro-American settlers fought those that threatened their villages settlements but left unabated. Even with advent of suppression capability in late 1880s, control efforts focused areas development while remote largely ignored. When Forest Service was established 1905, became reason for...
In 1972, Yosemite National Park established a wilderness fire zone in which lightning fires were allowed to run their courses under prescribed conditions. This was expanded 1973 include the 16 209 ha Illilouette Creek basin, just southeast of Valley. From through 2011, there have been 157 basin. Fire severity data collected on all 28 those that larger than 40 ha. The proportion burned each class not significantly associated with return interval departure class. When areas reburned, unchanged...
Abstract A study of fuels in Sierra Nevada conifer forests showed that fuel bed depth and weight significantly varied by tree species developmental stage the overstory. Specific values for woody, litter, duff are reported There was a significant positive relationship between weight. Estimates woody using planar intercept method were related to sampled values. These relationships can be used estimate weights field. West. J. Appl. For. 13(3):73-84.
Continental-scale studies of western North America have attributed recent increases in annual area burned and fire size to a warming climate, but these focussed on large fires left the issues severity ignition frequency unaddressed. Lightning ignitions, any which could burn given appropriate conditions for spread, be first indication more frequent fire. We examined relationship between snowpack that occurred Yosemite National Park, California (area 3027 km2), 1984 2005. During this period,...
Recent research has indicated that in most of the western United States, fire size is increasing, large fires are becoming more frequent, and at least some locations percentage high‐severity also increasing. These changes contemporary regime largely attributed to both changing climate land management practices, including suppression past timber harvesting, over last century. Fire management, using wildfire for resource benefits, varies among federal agencies, yet no published studies have...
Reducing the risk of large, severe wildfires while also increasing security mountain water supplies and enhancing biodiversity are urgent priorities in western US forests. After a century fire suppression, Yosemite Sequoia-Kings Canyon National Parks located California's Sierra Nevada initiated programs to manage these areas present rare opportunity study effects restored regimes. Forest cover decreased during managed wildfire period meadow shrubland increased, especially Yosemite's...
The objective of this study was to test the applicability using Normalized Difference Vegetation Index (NDVI) values derived from a temporal sequence six Landsat Thematic Mapper (TM) scenes map fuel models for Yosemite National Park, USA. An unsupervised classification algorithm used define 30 unique spectral-temporal classes NDVI values. A combination graphical, statistical and visual techniques characterize identify those that responded similarly could be combined into models. final...
Past attempts to suppress all fires in some western forests have altered historic fire regimes. Accumulated debris and dense understories of shade tolerant species coupled with a warmer climate led catastrophic wildfires. Prescribed wildland use are used by land managers reduce fuels restore natural conditions. Little is known about how wildfires, prescribed fires, differ their regime attributes. We compared the attributes start date, duration, 95th percentile burning index, size, rotation...
The temporal and spatial distribution of lightning strikes varies across California has a differential effect on fire ignitions. We analyzed 16 years strike data obtained from the National Lightning Detection Network to determine how was affected by geography, topography, large-scale weather patterns. Although there were significant differences in number density among bioregions, annual, monthly, hourly patterns similar. increased with elevation. Strike polarity varied month, mean peak...
Fire frequency, area burned, and fire severity are important attributes of a regime, but few studies have quantified the interrelationships among them in evaluating year. Although burned is often used to summarize season, may not be well correlated with either number or ecological effect fires. Using Landsat data archive, we examined all 148 wildland fires (prescribed wildfires) >40 ha from 1984 through 2009 for portion Sierra Nevada centered on Yosemite National Park, California, USA. We...