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Ecosystem

Displaying 3201 - 3220 of 6016 results

As climate has warmed over recent years, a new pattern of more frequent and more intense weather events has unfolded across the globe. Climate models simulate such changes in extreme events, and some of the reasons for the changes are well…
Author(s): Committee on Extreme Weather Events and Climate Change Attribution
Year Published:

Most models project warmer and drier climates that will contribute to larger and more frequent wildfires. However, it remains unknown how repeated wildfires alter post-fire successional patterns and forest structure. Here, we test the hypothesis…
Author(s): Camille Stevens-Rumann, Penelope Morgan
Year Published:

Fire scars are initiated by cambial necrosis caused by localized lethal heating of the tree stem. Scars develop as part of the linked survival processes of compartmentalization and wound closure. The position of scars within dated tree ring series…
Author(s): Kevin T. Smith, Estelle Arbellay, Donald A. Falk, Elaine Kennedy Sutherland
Year Published:

Emissions from burning piles of post-harvest timber slash (Douglas-fir) in Grande Ronde, Oregon were sampled using an instrument platform lofted into the plume using a tether-controlled aerostat or balloon. Emissions of carbon monoxide, carbon…
Author(s): Johanna Aurell, Brian K. Gullett, Dennis Tabor, Nick Yonker
Year Published:

Exotic plant invasions present a global threat to natural ecosystems, yet the efficacy of management efforts in mitigating invader impacts remains unclear. A rapidly emerging problem is that of secondary invasion — an increase in abundance of non-…
Author(s): Dean E. Pearson, Yvette K. Ortega, Justin B. Runyon, Jack L. Butler
Year Published:

Prior work shows western US forest wildfire activity increased abruptly in the mid-1980s. Large forest wildfires and areas burned in them have continued to increase over recent decades, with most of the increase in lightning-ignited fires. Northern…
Author(s): Anthony L. Westerling
Year Published:

Escalating wildfire in subalpine forests with stand- replacing fire regimes is increasing the extent of early- seral forests throughout the western USA. Post- fire succession generates the fuel for future fires, but little is known about fuel loads and…
Author(s): Kellen N. Nelson, Monica G. Turner, William H. Romme, Daniel B. Tinker
Year Published:

Previous research has focused on quantifying fuel loadings and using operational fire behavior models to understand changes in fire severity following MPB outbreaks. In this study however, researchers used direct field measurements taken from the…
Author(s): Northwest Fire Science Consortium
Year Published:

Mastication of shrubs and small trees to reduce fire hazard has become a widespread management practice, yet many aspects of the fire behaviour of these unique woody fuelbeds remain poorly understood. To examine the effects of fuelbed aging on fire…
Author(s): Jesse K. Kreye, J. Morgan Varner, Jeffrey M. Kane, Eric E. Knapp, Warren P. Reed
Year Published:

Effect of moisture content and heat flux type on ignition of foliage from 10 live fuels was examined over the course of a year using two apparatuses: a flat-flame burner coupled with a radiant panel and a Forced Ignition and flame Spread Test (FIST…
Author(s): David R. Weise, Thomas H. Fletcher, Shankar M. Mahalingam, Sara S. McAllister, Babak Shotorban, William Matt Jolly
Year Published:

We live on a flammable planet yet there is little consensus on the origin and evolution of flammability in our flora. We argue that part of the problem lies in the concept of flammability, which should not be viewed as a single quantitative trait or…
Author(s): Juli G. Pausas, Jon E. Keeley, Dylan W. Schwilk
Year Published:

Indigenous and sustainability sciences have much to offer one another regarding the identification of techniques and methods for sustaining resilient landscapes. Based upon the literature, and our findings, it is evident that some Indigenous peoples…
Author(s): Jay T. Johnson, Richard Howitt, Gregory Cajete, Fikret Berkes, Renee Pualani Louis, Andrew D. Kliskey
Year Published:

Each year, the general public and wildland firefighters in the US are exposed to smoke from wildland fires. As part of an effort to characterize health risks of breathing this smoke, a review of the literature was conducted using five major…
Author(s): Olorunfemi Adetona, Timothy E. Reinhardt, Joe Domitrovich, George Broyles, Anna M. Adetona, Michael T. Kleinman, Roger D. Ottmar, Luke P. Naeher
Year Published:

The complexity of impacts resulting from extreme precipitation events varies with the spatial extent of precipitation extremes. Characteristics of precipitation extremes, defined by the top 5% of 3-day accumulated precipitation, including their…
Author(s): Lauren E. Parker, John T. Abatzoglou
Year Published:

The recovery of forests following stand-replacing disturbance is of widespread interest; however, there is both a lack of definitional clarity for the term 'recovery' and a dearth of empirical data on the rates of forest recovery associated with…
Author(s): Samuel F. Bartels, Han Y. H. Chen, Michael A. Wulder, Joanne C. White
Year Published:

Fire refugia, sometimes referred to as fire islands, shadows, skips, residuals, or fire remnants, are an important element of the burn mosaic, but we lack a quantitative framework that links observations of fire refugia from different environmental…
Author(s): Meg A. Krawchuk, Sandra L. Haire, Jonathan D. Coop, Marc-Andre Parisien, Ellen Whitman, Geneva W. Chong, Carol Miller
Year Published:

Provides a detailed weather report throughout the Twisp River Fire.
Author(s): Ronald Miller, Robert Tobin, Bret W. Butler, Charles W. McHugh
Year Published:

This FEIS species review synthesizes information on the relationship of Centrocercus minimus, Centrocercus urophasianus (Gunnison sage-grouse, greater sage-grouse) to fire--how fire affects the species and its habitat, effects of the species on…
Author(s): Robin J. Innes
Year Published:

A study by Keane and Gray (2013) compared three sampling techniques for estimating surface fine woody fuels. Known amounts of fine woody fuel were distributed on a parking lot, and researchers estimated the loadings using different sampling…
Author(s): Kathy L. Gray, Robert E. Keane, Ryan Karpisz, Alyssa Pedersen, Rick Brown, Taylor Russell
Year Published:

Post-fire increases of runoff and erosion often occur and land managers need tools to be able to project the increased risk. The Erosion Risk Management Tool (ERMiT) uses the Water Erosion Prediction Project (WEPP) model as the underlying processor…
Author(s): Peter R. Robichaud, William J. Elliot, Sarah A. Lewis, Mary Ellen Miller
Year Published: