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Keyword: flammability

Fires, ecological effects of

Publications Posted on: January 31, 2017
Fire is both a natural and anthropogenic disturbance influencing the distribution, structure, and functioning of terrestrial ecosystems around the world. Many plants and animals depend on fire for their continued existence. Others species, such as rainforest plants species, are extremely intolerant of burning and need protection from fire.

Seasonal variations in red pine (Pinus resinosa) and jack pine (Pinus banksiana) foliar physio-chemistry and their potential influence on stand-scale wildland fire behavior

Publications Posted on: January 31, 2017
The 'Spring Dip' in conifer live foliar moisture content (LFMC) has been well documented but the actual drivers of these variations have not been fully investigated. Here we span this knowledge gap by measuring LFMC, foliar chemistry, foliar density and foliar flammability on new and old foliage for an entire year from both Pinus resinosa (red pine) and Pinus banksiana (jack pine) at a site in Central Wisconsin.

Logging slash flammability after five years

Publications Posted on: August 14, 2015
This paper reports the final phase of research that has determined the flammability of slash for nine species of northern Rocky Mountain conifers at three ages. Visual characteristics, rate of fire spread, and fire intensity for 5-year-old slash were studied by essentially the same methods as had been used previously on freshly cut and 1-year-old material.

Bark beetles, tree chemistry, and wildfires

Projects Posted on: April 22, 2015
Rocky Mountain Research Station scientists and collaborators are working to determine how bark beetle attacks change the moisture and chemistry of several tree species and how these changes affect flammability. Findings will allow us to improve fire behavior and risk models to better predict and manage wildfires and protect property and human life. 

Interactions among the mountain pine beetle, fires, and fuels

Publications Posted on: September 06, 2013
Bark beetle outbreaks and wildfires are principal drivers of change in western North American forests, and both have increased in severity and extent in recent years. These two agents of disturbance interact in complex ways to shape forest structure and composition.

Relationships between moisture, chemistry, and ignition of Pinus contorta needles during the early stages of mountain pine beetle attack

Publications Posted on: February 16, 2012
Very little is known about how foliar moisture and chemistry change after a mountain pine beetle attack and even less is known about how these intrinsic foliar characteristics alter foliage ignitability. Here, we examine the fuel characteristics and ignition potential of Pinus contorta (lodgepole pine) foliage during the early stages of a mountain pine beetle attack.

Ignition delay of combustible materials in normoxic equivalent environments

Publications Posted on: October 19, 2009
Material flammability is an important factor in determining the pressure and composition (fraction of oxygen and nitrogen) of the atmosphere in the habitable volume of exploration vehicles and habitats. The method chosen in this work to quantify the flammability of a material is by its ease of ignition. The ignition delay time was defined as the time it takes a combustible material to ignite after it has been exposed to an external heat flux.