"This study provides the most definitive evidence yet of the effectiveness of fuel treatments in dry forests of the Pacific Northwest," said Susan Prichard, a UW research scientist and senior author of the study. "If dense forests are thinned and the surface fuels are removed, then ponderosa pine and Douglas-fir trees have a better chance of surviving an intense wildfire."
Prichard and her Forest Service colleagues quantified tree mortality on the Okanogan-Wenatchee National Forest in an area affected by the 2006 Tripod Fire, which burned through forested areas managed to reduce potential fire hazard. Because of the management history of the area, the researchers were able to compare untreated stands, stands that were thinned, and stands that were thinned and then underwent prescribed burns to remove surface fuels.
Results of the comparison revealed that the Tripod Complex fires killed over 80% of trees in stands without treatment and in stands with thinning only. Nearly 60% of trees survived in stands with thinning plus fuel treatment, and three-quarters of larger trees—those with diameters larger than 8 inches—survived.
"It's all about fuels—dead fuels on the ground add energy to wildfire and carry it across the landscape and dense stands of live trees and shrubs act as fuel ladders, moving fire into the canopy," said Dave Peterson, a research biologist with the Forest Service's Pacific Northwest Research Station who coauthored the study. "The objective of fuel treatments is not to eliminate wildfires, but to reduce their intensity in areas where we want to protect resources."
If, as expected, a warmer climate causes an increase in wildfire in future decades, conducting fuel treatments in forest ecosystems will be an important tool for reducing damage from fire and increasing resilience to climate change.
"If we implement treatments across large areas and place them strategically, we can manage these low-elevation forests sustainably, even in a warmer climate," Peterson said.
To view the article's abstract online, visit http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=eng&journal=cjfr&volume=40&year=0&issue=8&msno=x10-109.
The PNW Research Station is headquartered in Portland, Oregon. It has 11 laboratories and centers located in Alaska, Oregon, and Washington and about 425 employees.
Yasmeen Sands | EurekAlert!
Safeguarding sustainability through forest certification mapping
27.06.2017 | International Institute for Applied Systems Analysis (IIASA)
Dune ecosystem modelling
26.06.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine