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Ecosystem

Displaying 901 - 920 of 5894 results

Environmental models involve inherent uncertainties, the understanding of which is required for use by practitioners. One method of uncertainty quantification is global sensitivity analysis (GSA), which has been extensively used in environmental…
Author(s): Ujjwal KC, Jagannath Aryal, Saurabh Garg, J. E. Hilton
Year Published:

The safety during prescribed burnings could be achieved by conducting these operations under marginal conditions of fire propagation. This type of fire can or cannot propagate on account of small deviations of the burning conditions, mainly the wind…
Author(s): Carmen Awad, N. Frangieh, Thierry Marcelli, Gilbert Accary, D. Morvan, Sofiane Meradji, François Joseph Chatelon, Jean Louis Rossi
Year Published:

The unprecedented scale of the 2019-2020 eastern Australian bushfires exemplifies the challenges that scientists and conservation biologists face monitoring the effects on biodiversity in the aftermath of large-scale environmental disturbances.…
Author(s): Casey Kirchhoff, Corey T. Callaghan, David A. Keith, Dony Indiarto, Guy Taseski, Mark K. J. Ooi, Tom D. Le Breton, Thomas Mesaglio, Richard T. Kingsford, William K. Cornwell
Year Published:

Fire weather tools, such as the National Fire Danger Rating System (NFDRS) and the Wildland Fire Decision Support System (WFDSS), have been developed to support wildland fire management decisions. However, little is known about how these tools are…
Author(s): Eric L. Toman, Robyn S. Wilson, William Matt Jolly, Christine Olsen
Year Published:

Fire spread associated with violent pyrogenic convection is highly unpredictable and difficult to suppress. Wildfire-driven convection may generate cumulonimbus (storm) clouds, also known as pyrocumulonimbus (pyroCb). Research into such phenomena…
Author(s): Rachel Badlan, J. Sharples, Jason P. Evans, Richard H. D. McRae
Year Published:

Over the past century the size and severity of wildfires, as well as post-fire recovery processes (e.g., seedling establishment), have been altered from historical levels due to management policies and changing climate. Tree seedling establishment…
Author(s): Darcy H. Hammond, Eva K. Strand, Penelope Morgan, Andrew T. Hudak, Beth A. Newingham
Year Published:

Wildland fires have been a rising problem on the worldwide level, generating ecological and economic losses. Specifically, between wildland fire types, uncontrolled fires are critical due to the potential damage to the ecosystem and their effects on…
Author(s): Felipe Vasquez, Ania Cravero, Manuel Castro, Patricio Acevedo
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Summary: Historical fire regimes in plains grassland and prairie ecosystems of central North America are characterized by frequent fires with return intervals ranging from 1 to 35 years. Frequent fires removed accumulated litter, stimulated native…
Author(s): Kristin L. Zouhar
Year Published:

Suppression of most wildland fire ignitions has defined fire management in the United States since 1935. These past suppression activities, along with climate change impacts and other factors, have resulted in longer fire seasons and increased…
Author(s): Julia Berkey, Carol Miller, Andrew J. Larson
Year Published:

While managed fire often produces clear changes in aboveground functional diversity, we know little about how fire affects belowground fauna and their mediation of biogeochemical processes. Because soil micro- and mesofauna, particularly nematodes,…
Author(s): Anita Antoninka, Kara Gibson
Year Published:

Wildfires pose significant risks to populations living in the Wildland-Urban Interface (WUI). We examine the influence of WUI residents’ risk perceptions as well as other cognitive constructs (guided by Protection Motivation Theory) likely to…
Author(s): Lauren Nicole Dupey Larsen, Peter D. Howe, Mark W. Brunson, Larissa L. Yocom, Darren McAvoy, E. Helen Berry, Jordan W. Smith
Year Published:

Physical distancing and wearing a face mask are key interventions to prevent COVID-19. While this remains difficult to practice for millions of firefighters in fire engines responding to emergencies, the delayed forthcoming of evidence on the…
Author(s): Elmar Bourdon, Thomas Schaefer, Maximilian Kittel, Matthias Raedle, Alexandra Heininger
Year Published:

Wildfire-generated snags provide key habitat for wildlife associated with recently disturbed forests, offering nesting and foraging resources for several woodpecker species. Snag harvest through post-fire salvage logging provides economic value but…
Author(s): Todd Cross, Quresh Latif, Jonathan G. Dudley, Victoria A. Saab
Year Published:

Wildfires have caused increasingly negative impacts with increasing occurrences close to densely populated regions. Evacuations are among the most critical measures in the immediate wildfire relief measures. While social media have been used in…
Author(s): Lingyao Li, Zihui Ma, Tao Cao
Year Published:

Abrupt changes in wind direction and speed caused by thunderstorm-generated gust fronts can, within a few seconds, transform slow-spreading low-intensity flanking fires into high-intensity head fires. Flame heights and spread rates can more than…
Author(s): Gary Achtemeier, Scott L. Goodrick
Year Published:

Throughout the conifer forests of the western United States, wildfires are projected to become larger and more frequent under climate change. The use or prescribed fires is one pathway to mitigate these fires and reduce crown fire hazard. Regardless…
Author(s): Alistair M. S. Smith, Raquel Partelli-Feltrin
Year Published:

Global change has resulted in chronic shifts in fire regimes. Variability in the sensitivity of tree communities to multi-decadal changes in fire regimes is critical to anticipating shifts in ecosystem structure and function, yet remains poorly…
Author(s): Adam F. A. Pellegrini, Tyler Refsland, Colin Averill, Cesar Terrer, Monica G. Turner, J. Morgan Varner
Year Published:

Over millennia, many indigenous and Tribal peoples in North America’s fire-prone ecosystems developed sophisticated relationships with wildland fire that continue today. This article introduces philosophical, conceptual, and operational approaches…
Author(s): Frank K. Lake
Year Published:

Altered climate, including weather extremes, can cause major shifts in vegetative recovery after disturbances. Predictive models that can identify the separate and combined temporal effects of disturbance and weather on plant communities and that…
Author(s): Cara Applestein, T. Trevor Caughlin, Matthew J. Germino
Year Published:

During wildfire season in the western US, fire retardant chemicals are dropped from aircraft in an effort to control the spread of fire. Fire retardant dropped on sites that are not actively burning results in exceptionally high soil nitrogen (N)…
Author(s): Si Gao, Thomas H. DeLuca
Year Published: