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Ecosystem

Displaying 1421 - 1440 of 6051 results

Fire can be extremely harmful to sensitive ecosystems such as rainforests while maintaining the structure and composition of savanna environments. That is because historically, rainforest species have not been subjected to recurring fires requiring…
Author(s): Christian N. Berlinck, Eugênia Kelly Luciano Batista
Year Published:

Natural disasters are inherently traumatic. The unexpected, unpredictable, threatening, and overwhelming nature of these events can be destabilising and distressing, potentially leading to psychological trauma (Substance Abuse & Mental Health…
Author(s): Sancia West, Denis C. Visentin, Amanda Neil, Grad Dip, Rachel Kornhaber, Valerie Ingham, Michelle Cleary
Year Published:

We examined the effects of two recent, high-severity disturbances on seed dispersal and conifer seedling establishment in a subalpine spruce-fir forest in the San Juan Mountains, Colorado. Our study area had undergone high forest mortality from a…
Author(s): Amanda R. Carlson, Jason S. Sibold, Jose F. Negron
Year Published:

Multiple, simultaneous environmental changes, in climatic/abiotic factors, interacting species, and direct human influences, are impacting natural populations and thus biodiversity, ecosystem services, and evolutionary trajectories. Determining…
Author(s): William F. Morris, Johan Ehrlén, Johan P. Dahlgren, Alexander K. Loomis, Allison M. Louthan
Year Published:

For the physical model of wildland fire spread, errors or discrepancies in the prediction of spread rate may arise from uncertain, imprecise or improper determinations of the model parameters due to unreasonable assumptions, rough approximations, or…
Author(s): Xieshang Yuan, Naian Liu, Xiaodong Xie, Domingos Xavier Viegas
Year Published:

By suppressing all wildfires and incessantly burning fossil fuels, humans have upset the role that fire has historically played in providing ecological balance. We need to rethink our view of fire and accept its presence by changing how we manage…
Author(s): Stephen Pyne
Year Published:

Limber pine (Pinus flexilis), an understudied tree species important to montane and subalpine ecosystems, is listed as endangered in Alberta. Dispersal of seeds to newly disturbed, open areas by Clark's nutcracker (Nucifraga columbiana) is expected…
Author(s): Denyse A. Dawe, Vernon S. Peters, Michael D. Flannigan
Year Published:

Background: This paper describes Fires of Change, a collaborative art exhibit designed to communicate about the shifting fire regimes of the United States Southwest through the lens of multimedia art. The Southwest Fire Science Consortium and…
Author(s): Melanie M. Colavito, Barbara S. Wolfson, Andrea E. Thode, Collin M. Haffey, Carolyn Kimball
Year Published:

Prescribed fire can result in significant benefits to ecosystems and society. Examples include improved wildlife habitat, enhanced biodiversity, reduced threat of destructive wildfire, and enhanced ecosystem resilience. Prescribed fire can also come…
Author(s): Molly E. Hunter, Marcos D. Robles
Year Published:

Acetylene is a short‐lived trace gas produced during combustion of fossil fuels, biomass, and biofuels. Biomass burning is likely the only major source of acetylene in the preindustrial atmosphere, making ice core acetylene a powerful tool for…
Author(s): Melinda R. Nicewonger, Murat Aydin, Michael J. Prather, Eric S. Saltzman
Year Published:

The ability to map fire severity is a requirement for fire management agencies worldwide. The development of repeatable methods to produce accurate and consistent fire severity maps from satellite imagery is necessary to document fire regimes, to…
Author(s): Luke Collins, Greg McCarthy, Andrew Mellor, Graeme Newell, Luke Smith
Year Published:

A simple laboratory-scale experimental method was developed to study firebrand generation processes. As part of these experiments, Japanese wind facilities were used to elucidate the effect of wind speed on firebrand generation from structural…
Author(s): Sayaka Suzuki, Sam Manzello
Year Published:

Researchers are increasingly examining patterns and drivers of postfire forest recovery amid growing concern that climate change and intensifying fires will trigger ecosystem transformations. Diminished seed availability and postfire drought have…
Author(s): Caitlin E. Littlefield, Solomon Z. Dobrowski, John T. Abatzoglou, Sean A. Parks, Kimberley T. Davis
Year Published:

Burn severity is the ecological change resulting from wildland fires. It is often mapped by using prefire and postfire satellite imagery and classified as low, moderate, or high. Areas burned with high severity are of particular concern to land…
Author(s): Gregory K. Dillon, Matthew Panunto, Brett Davis, Penelope Morgan, Donovan Birch, William Matt Jolly
Year Published:

We analysed the influence of wildfire area, topography, fuel, surface weather and upper-level weather conditions on long-distance spotting during wildfires. The analysis was based on a large dataset of 338 observations, from aircraft-acquired…
Author(s): Michael A. Storey, Owen F. Price, J. Sharples, Ross A. Bradstock
Year Published:

The simultaneous occurrence of wildfire can hinder firefighting effectiveness via multiple mechanisms that might explain historical resource demand trends. We validate this hypothesis by using data from the Monitoring Trends in Burn Severity (MTBS)…
Author(s): Harry Podschwit, Alison Cullen
Year Published:

The aim of this paper is to create a user-friendly computational tool for analysis of wildland fire behavior and its effect on urban and other structures. A physics-based multiphase Computational Fluid Dynamics (CFD) model of wildfire initiation and…
Author(s): Vladimir Agranat, Valeriy Perminov
Year Published:

Purpose:This paper reviews the most recent literature related to the use of remote sensing (RS) data in wildland fire management. Recent Findings: Studies dealing with pre-fire assessment, active fire detection, and fire effect monitoring are…
Author(s): Emilio Chuvieco, Inmaculada Aguado, Javier Salas, Mariano Garcia, Marta Yebra, Patricia Oliva
Year Published:

Forests of the western U.S. are undergoing substantial stress from fire exclusion and increasing effects of climate change, altering ecosystem functions and processes. Changes in broad‐scale drivers of forest community composition become apparent in…
Author(s): Laura A. Marshall, Donald A. Falk
Year Published:

Evacuation is the preferred method in the U.S. for preserving public safety in wildfire. However, alternatives such as staying and defending are used both in North America and Australia. Dangerous delays in the decision to evacuate are also common.…
Author(s): Hugh D. Walpole, Robyn S. Wilson, Sarah M. McCaffrey
Year Published: