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Ecosystem

Displaying 2281 - 2300 of 6073 results

Research Highlights: The impact of variation in fuels and fuel dynamics among forest cover types on the outcome of fuel treatments is poorly understood. This study investigated the potential effects of treatment placement with respect to cover type…
Author(s): Seth A. Ex, Justin P. Ziegler, Wade T. Tinkham, Chad M. Hoffman
Year Published:

Following high-severity wildfire, application of mulch on the soil surface is commonly used to stabilize slopes and limit soil erosion potential, protecting ecosystem values at risk. Despite the widespread use of mulch, relatively little is known…
Author(s): Jayne L. Jonas, Erin Berryman, Brett Wolk, Penelope Morgan, Peter R. Robichaud
Year Published:

Wildfire is the predominant natural disturbance in the boreal forests of western Canada. Natural disturbance-based forest management involves the use of retention harvesting to retain stand structural diversity post-harvest; however, this partial…
Author(s): Caroline Mary Adrianne Franklin, Scott E. Nielsen, S. Ellen Macdonald
Year Published:

One of the first significant developments in wildfire modeling research was to introduce heat flux as wildfire line intensity (kW·m–1). This idea could be adapted to using weather station measurements, topography, and fuel properties to estimate…
Author(s): A. Bakhshaii, E. A. Johnson
Year Published:

Presently, there is a need for a robust numerical simulation approach to investigate the influence of various parameters on fire spread in large open framed structures. CFD-based methods can already be used for analyzing the fire conditions but they…
Author(s): R. Kallada Janardhan, S. Hostikka
Year Published:

Forest fires and their legacy form an inherently dynamic relationship between ecology and human uses of the forest. This paper provides an overview of the dynamic dimensions that are present in the aftermath of a fire. These include the evolution of…
Author(s): Jeffrey Englin
Year Published:

Numerical simulations of laboratory-scale experiments, with no wind imposed, were performed for fuel bed slopes ranging from 0° to 45°. The implementation of a vertical symmetry plane (SP) placed, span-wise, along the middle of the computational…
Author(s): X. Sánchez-Monroy, William E. Mell, J. Torres-Arenas, Bret W. Butler
Year Published:

The Earth has experienced large changes in global and regional climates over the past one million years. Understanding processes and feedbacks that control those past environmental changes is of great interest for better understanding the nature,…
Author(s): Anne Laure Daniau, Stéphanie Desprat, Julie C. Aleman, Laurent Bremond, Basil A. S. Davis, William Fletcher, Jennifer R. Marlon, Laurent Marquer, Vincent Montade, César Morales-Molino, Filipa Naughton, Damien Rius, Dunia H. Urrego
Year Published:

Fuel loads in real-world fire scenarios often feature discrete elements, discontinuities, or inhomogeneities; however, most models for flame spread only assume a continuous, homogeneous fuel. Because discrete fuels represent a realistic scenario not…
Author(s): Jiang Lin, Zhao Zhao, Wei Tang, Colin H. Miller, Jin-Hua Sun, Michael J. Gollner
Year Published:

Wildfire can exert considerable influence on many watershed processes, including the partitioning of precipitation by forest canopies. Despite general acknowledgement that canopy interception is reduced following wildfire, effects on net rainfall…
Author(s): Chris H. S. Williams, Uldis Silins, Sheena A. Spencer, Michael J. Wagner, Micheal Stone, Monica B. Emelko
Year Published:

Many ecosystems and landscapes are experiencing rapid and potentially persistent changes as the result of complex and potentially novel interactions of anthropogenic climate changes; shifting fire regimes; exotic plant, insect, and pathogen…
Author(s): Robert E. Keane, Rachel A. Loehman
Year Published:

Plant invasions can affect fuel characteristics, fire behavior, and fire regimes resulting in invasive plant-fire cycles and alternative, self-perpetuating states that can be difficult, if not impossible, to reverse. Concepts related to general…
Author(s): Jeanne C. Chambers, Matthew L. Brooks, Matthew J. Germino, Jeremy D. Maestas, David Board, Matthew O. Jones, Brady W. Allred
Year Published:

As wildfire activity increases in many regions of the world, it is imperative that we understand how key components of fire‐prone ecosystems respond to spatial variation in fire characteristics. Pollinators provide a foundation for ecological…
Author(s): Sara M. Galbraith, James H. Cane, Andrew R. Moldenke, James W. Rivers
Year Published:

Altered fire regimes can drive major and enduring compositional shifts or losses of forest ecosystems. In western North America, ponderosa pine and dry mixed‐conifer forest types appear increasingly vulnerable to uncharacteristically extensive, high…
Author(s): Jonathan D. Coop, Timothy J. DeLory, William M. Downing, Sandra L. Haire, Meg A. Krawchuk, Carol Miller, Marc-Andre Parisien, Ryan B. Walker
Year Published:

We mapped yearly (2000–2016) estimates of annual grass percent cover for much of the sagebrush ecosystem of the western United States using remotely sensed, climate, and geophysical data in regression-tree models. Annual grasses senesce and cure by…
Author(s): Stephen P. Boyte, Bruce K. Wylie, Donald J. Major
Year Published:

Predicting the efficacy of fuel treatments aimed at reducing high severity fire in dry-mixed conifer forests in the western US is a challenging problem that has been addressed in a variety of ways using both field observations and wildfire…
Author(s): Ana M. G. Barros, Alan A. Ager, Michelle A. Day, Palaiologos Palaiologou
Year Published:

Wildfires in urban landscapes spreading into forested landscapes are a growing problem due to socioeconomic and climate changes. Fire ignition and flame spread depend on meteorological and environmental conditions and the physicochemical traits of…
Author(s): Juan Ramón Molina Martínez, Ángel Lora, Cristina Prades, Francisco Rodriguez y Silva
Year Published:

In the western United States, fire has become a significant concern in the management of big sagebrush (Artemisia tridentata Nutt.) ecosystems. This is due to large‐scale increases in cover of the fire‐prone invasive annual cheatgrass (Bromus…
Author(s): Corinna Riginos, Thomas A. Monaco, Kari E. Veblen, Kevin L. Gunnell, Eric Thacker, David K. Dahlgren, Terry A. Messmer
Year Published:

Wildfire disasters are one of the many consequences of increasing wildfire activities globally, and much effort has been made to identify strategies and actions for reducing human vulnerability to wildfire. While many individual homeowners and…
Author(s): Crystal A. Kolden, Carol Henson
Year Published: