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Displaying 121 - 140 of 5651

Falling trees and tree fragments are one of the top five leading causes of fatalities for wildland fire responders. Wildfires - along with insect infestations, drought, disease, and other disturbances - have increased dead and dying trees in forests…
Author(s): Karen L. Riley, Kit O'Connor
Year Published:

Background Native pinyon (Pinus spp.) and juniper (Juniperus spp.) trees are expanding into shrubland communities across the Western United States. These trees often outcompete with native sagebrush (Artemisia spp.) associated species, resulting in…
Author(s): Claire Williams, Lisa M. Ellsworth, Eva K. Strand, Matthew C. Reeves, Scott E. Shaff, Karen C. Short, Jeanne C. Chambers, Beth A. Newingham, Claire Tortorelli
Year Published:

Fire has shaped ecological communities worldwide for millennia but impacts of fire on individual species are often poorly understood. We performed a meta-analysis to predict which traits, habitat or study variables, and fire characteristics…
Author(s): Christopher A. Pocknee, Sarah Legge, Jane McDonald, Diana O. Fisher
Year Published:

Structure loss is an acute, costly impact of the wildfire crisis in the western conterminous United States (“West”), motivating the need to understand recent trends and causes. We document a 246% rise in West-wide structure loss from wildfires…
Author(s): Philip E. Higuera, Maxwell C. Cook, Jennifer Balch, E. Natasha Stavros, Adam L. Mahood, Lise A. St. Denis
Year Published:

Background Increases in fire activity and changes in fire regimes have been documented in recent decades across the western United States. Climate change is expected to continue to exacerbate impacts to forested ecosystems by increasing the…
Author(s): Tzeidle N. Wasserman, Stephanie E. Mueller
Year Published:

High-severity fires and short-interval reburns strongly influence forest structure and composition and may overwhelm forest ecosystem resilience and catalyze persistent shifts to non-forest conditions. Recent increases in annual area burned and…
Author(s): Melissa Jaffe, Mark R. Kreider, David L.R. Affleck, Philip E. Higuera, Carl A. Seielstad, Sean A. Parks, Andrew J. Larson
Year Published:

Sagebrush ecosystems in the United States have been declining since EuroAmerican settlement, largely due to agricultural and urban development, invasive species, and altered fire regimes, resulting in loss of biodiversity and wildlife habitat. To…
Author(s): Douglas J. Shinneman, Eva K. Strand, Michael L. Pellant, John T. Abatzoglou, Mark W. Brunson, Nancy F. Glenn, Julie A. Heinrichs, Mojtaba Sadegh, Nicole M. Vaillant
Year Published:

Historical logging practices and fire exclusion have reduced the proportion of pine in mixed-conifer forests of the western United States. To better understand pine’s decline, we investigate the impact of historical logging on the tree regeneration…
Author(s): Emily G. Brodie, Eric E. Knapp, Andrew Latimer, Hugh Safford, Marissa Vossmer, Sarah M. Bisbing
Year Published:

Fire regimes are a major agent of evolution in terrestrial animals. Changing fire regimes and the capacity for rapid evolution in wild animal populations suggests the potential for rapid, fire-driven adaptive animal evolution in the Pyrocene. Fire…
Author(s): Gavin M. Jones, Joshua F. Goldberg, Taylor M. Wilcox, Lauren B. Buckley, Catherine L. Parr, Ethan B. Linck, Emily D. Fountain, Michael K. Schwartz
Year Published:

Fire regimes in sagebrush (Artemisia spp.) ecosystems have been greatly altered across the western United States. Broad-scale invasion of non-native annual grasses, climate change, and human activities have accelerated wildfire cycles, increased…
Author(s): Michele R. Crist, Rick Belger, Kirk W. Davies, Dawn Davis, James R. Meldrum, Douglas J. Shinneman, Thomas E. Remington, Justin L. Welty, Kenneth E. Mayer
Year Published:

Background: Previously established correlations of flame length L with fireline intensity IB are based on theory and data which showed that flame zone depth D of a line fire could be neglected if L was much greater than D. Aims: We evaluated this…
Author(s): Mark A. Finney, Torben Grumstrup
Year Published:

The surface fire spread involved slope and wind effects are significantly important in wildland fires, while very limited attention has been paid on the heat transfer mechanism, especially for different fire line conditions. This work experimentally…
Author(s): Hanwen Guo, Dong Xiang, Yunji Gao, Yuchun Zhang
Year Published:

An experimental study at a laboratory scale that aims to compare the fire behaviour in two configurations: a regular flat slope and a slope with an embedded canyon. In configurations of slope with an embedded canyon, a rapid increase in the rate of…
Author(s): André Rodrigues, Domingos Xavier Viegas, Miguel Almeida, Carlos Ribeiro, Jorge R. Raposo, Jorge André
Year Published:

Wildfire spread models that couple physical transport and chemical kinetics sometimes simplify or neglect gas-phase pyrolysis product oxidation chemistry. However, empirical evidence suggests that oxygen (O2) is available for gas-phase and solid-…
Author(s): Alexandra Howell, Erica Belmont, Sara S. McAllister, Mark A. Finney
Year Published:

Biodiversity is in chronic decline, and extreme events - such as wildfires - can add further episodes of acute losses. Fires of increasing magnitude will often overwhelm response capacity, and decision-makers need to make choices about what to…
Author(s): John C. Z. Woinarski, Phillipa C. McCormack, Jan McDonald, Sarah Legge, Stephen T. Garnett, Brendan A. Wintle, Libby Rumpff
Year Published:

As the 2023 fire season rages with unprecedented intensity in Canada, millions of people and countless animals across North America are exposed to wildfire smoke. Its harmful effects on human and animal health are only beginning to be explored in…
Author(s): Michael Gross
Year Published:

Interactions between vegetation and sediment in post-fire landscapes play a critical role in sediment connectivity. Prior research has focused on the effects of vegetation removal from hillslopes, but little attention has been paid to the effects of…
Author(s): Kailey V. Adams, Jean L. Dixon, Andrew C. Wilcox, Dave McWethy
Year Published:

There are approximately 1.2 million firefighters in the United States. In addition to fighting fires, they also participate in various tasks including emergency rescues, providing emergency medical care, driving, operating and maintaining fire…
Author(s): Crystal D. Forester, Jay Tarley
Year Published:

Fire–vegetation feedbacks potentially maintain global savanna and forest distributions. Accordingly, vegetation in savanna and forest ecosystems should have differential responses to fire, but fire response data for herbaceous vegetation have yet to…
Author(s): Zachary J. Gold, Adam F. A. Pellegrini, Tyler Refsland, Romina J. Andrioli, Marlin L. Bowles, Dale G. Brockway, Neil D. Burrows, Augusto C. Franco, Stephen W. Hallgren, Sarah E. Hobbie, William A. Hoffmann, Kevin P. Kirkman, Peter B. Reich, Patrice Savadogo, Divino V. Silverio, Kirsten Stephan, Tercia Strydom, J. Morgan Varner, Dale D. Wade, Allan J. Wills, A. Carla Staver
Year Published:

An atmospheric river (AR) is a strong filamentary water vapor transport that plays a critical role in regional hydroclimate systems. While climate conditions can affect wildfire activities, the process by which ARs are associated with wildfire…
Author(s): Ju-Mee Ryoo, Taejin Park
Year Published:

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