You are here

Keyword: fire severity

Spatiotemporal patterns of unburned areas within fire perimeters in the northwestern United States from 1984 to 2014

Publications Posted on: May 11, 2018
A warming climate, fire exclusion, and land cover changes are altering the conditions that produced historical fire regimes and facilitating increased recent wildfire activity in the northwestern United States. Understanding the impacts of changing fire regimes on forest recruitment and succession, species distributions, carbon cycling, and ecosystem services is critical, but challenging across broad spatial scales.

What drives low-severity fire in the southwestern USA?

Publications Posted on: April 23, 2018
Many dry conifer forests in the southwestern USA and elsewhere historically (prior to the late 1800’s) experienced fairly frequent surface fire at intervals ranging from roughly five to 30 years. Due to more than 100 years of successful fire exclusion, however, many of these forests are now denser and more homogenous, and therefore they have a greater probability of experiencing stand-replacing fire compared to prior centuries.

High-severity fire: Evaluating its key drivers and mapping its probability across western US forests

Publications Posted on: April 23, 2018
Wildland fire is a critical process in forests of the western United States (US). Variation in fire behavior, which is heavily influenced by fuel loading, terrain, weather, and vegetation type, leads to heterogeneity in fire severity across landscapes. The relative influence of these factors in driving fire severity, however, is poorly understood.

Fires following bark beetles: Factors controlling severity and disturbance interactions in ponderosa pine

Publications Posted on: January 09, 2018
Previous studies have suggested that bark beetles and fires can be interacting disturbances, whereby bark beetle-caused tree mortality can alter the risk and severity of subsequent wildland fires. However, there remains considerable uncertainty around the type and magnitude of the interaction between fires following bark beetle attacks, especially in drier forest types such as those dominated by ponderosa pine (Pinus ponderosa Lawson & C.

Multidecadal trends in area burned with high severity in the Selway-Bitterroot Wilderness Area 1880-2012

Publications Posted on: December 12, 2017
Multidecadal trends in areas burned with high severity shape ecological effects of fires, but most assessments are limited to ~30 years of satellite data.

Spatial patterns of ponderosa pine regeneration in high-severity burn patches

Publications Posted on: September 28, 2017
Contemporary wildfires in southwestern US ponderosa pine forests can leave uncharacteristically large patches of tree mortality, raising concerns about the lack of seed-producing trees, which can prevent or significantly delay ponderosa pine regeneration.

Spatial patterns of ponderosa pine regeneration in high-severity burn patches

Science Spotlights Posted on: August 25, 2017
Over the past three decades, wildfires in southwestern United States ponderosa pine forests have increased in size and severity, leaving large patches of tree mortality. Ponderosa pine evolved under fire regimes dominated by low- to moderate-severity wildfires, and they are poorly adapted to regenerating in large patches of high-severity fire. There is concern about these high-severity burn patches because the lack of seed-producing trees can prevent or significantly delay ponderosa pine regeneration.

Assessment of fire effects based on Forest Inventory and Analysis data and a long-term fire mapping data set

Publications Posted on: May 24, 2017
Integration of Forest Inventory and Analysis (FIA) plot data with Monitoring Trends in Burn Severity (MTBS) data can provide new information about fire effects on forests. This integration allowed broad-scale assessment of the cover types burned in large fires, the relationship between prefire stand conditions and fire severity, and postfire stand conditions.

Long-term, landscape patterns of past fire events in a montane ponderosa pine forest of central Colorado

Publications Posted on: December 27, 2016
Parameters of fire regimes, including fire frequency, spatial extent of burned areas, fire severity, and season of fire occurrence, influence vegetation patterns over multiple scales. In this study, centuries-long patterns of fire events in a montane ponderosa pine - Douglas-fir forest landscape surrounding Cheesman Lake in central Colorado were reconstructed from fire-scarred trees and inferences from forest stand ages.

Monitoring bird communities with citizen science in the Sky Islands

Science Spotlights Posted on: August 25, 2016
This research evaluates the use of citizen science in a region with increased stress from ongoing drought and wildfires. Researchers show how it allows for inexpensive and statistically rigorous monitoring, and fosters greater local involvement in science and conservation. This information will be used to determine optimal protocols for a long-term monitoring plan. Inexpensive and statistically rigorous long-term monitoring fosters local involvement in science and conservation.