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Ecosystem

Displaying 2821 - 2840 of 6051 results

Climate change is projected to exacerbate the intensity of heat waves and drought, leading to a greater incidence of large and high-intensity wildfires in forested ecosystems. Predicting responses of seedlings to such fires requires a process-based…
Author(s): Alistair M. S. Smith, Alan F. Talhelm, Daniel M. Johnson, Aaron M. Sparks, Crystal A. Kolden, Kara M. Yedinak, Kent G. Apostol, Wade T. Tinkham, John T. Abatzoglou, James A. Lutz, Anthony S. Davis, Kurt S. Pregitzer, Henry D. Adams, Robert L. Kremens
Year Published:

Land managers typically make post hoc assessments of the effectiveness of fuel reduction burning (FRB), but often lack a rigorous sampling framework. A general, but untested, assumption is that variability in soil and fuel properties increases from…
Author(s): Mana Gharun, Malcolm Possell, Meaghan E. Jenkins, Lai Fan Poon, Tina L. Bell, Mark A. Adams
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Characterising the impacts of wildland fire and fire suppression is critical information for fire management decision-making. Here, we focus on decisions related to the rare larger and longer-duration fire events, where the scope and scale of…
Author(s): Matthew P. Thompson, Francisco Rodriguez y Silva, David E. Calkin, Michael S. Hand
Year Published:

Wildfire is a dominant disturbance agent in forest ecosystems, shaping important biogeochemical processes including net carbon (C) balance. Long-term monitoring and chronosequence studies highlight a resilience of biogeochemical properties to large…
Author(s): Tara W. Hudiberg, Philip E. Higuera, Jeffrey A. Hicke
Year Published:

Evidence of increasing fire extent and severity in the western US in recent decades has raised concern over the effects of fire on threatened species such as the spotted owl (Strix occidentalis Xantus de Vesey), which nests in forests with large…
Author(s): Joseph L. Ganey, Ho Yi Wan, Samuel A. Cushman, Christina D. Vojta
Year Published:

Tree-age data in combination with fire scars improved inverse-distance-weighted spatial modelling of historical fire boundaries and intervals for the Darkwoods, British Columbia, Canada. Fire-scarred trees provided direct evidence of fire. The…
Author(s): Gregory A. Greene, Lori D. Daniels
Year Published:

Restoration treatments in dry forests of the western US often attempt silvicultural practices to restore the historical characteristics of forest structure and fire behavior. However, it is suggested that a reliance on non-spatial metrics of forest…
Author(s): J. Ziegler, Chad M. Hoffman, Michael A. Battaglia, William E. Mell
Year Published:

Big sagebrush does not root or crown sprout but relies entirely on seed for regeneration. The soil seed bank in sagebrush communities is short-lived, with most seeds germinating within one year of dispersal (Ziegenhagen and Miller 2009). Therefore,…
Author(s): Stanley G. Kitchen, Melissa L. Landeen, Loreen Allphen, Stephen L. Petersen
Year Published:

Concern over the effects of removing fire-scarred partial cross-sections may limit sampling of live ponderosa pine to reconstruct fire history. We report mortality rates for ponderosa pine trees 20 to 21 years after removing fire-scarred partial…
Author(s): Emily K. Heyerdahl, Steven J. McKay
Year Published:

Hand-constructed piles in eastern Washington and north-central New Mexico were weighed periodically between October 2011 and June 2015 to develop decay-rate constants that are useful for estimating the rate of piled biomass loss over time. Decay-…
Author(s): Clinton S. Wright, Alexander M. Evans, Joseph C. Restaino
Year Published:

The Wildland Urban Interface Wildfire Mitigation Desk Reference Guide is designed to provide basic background information on relevant programs and terminology for those, whether community members or agency personnel, who are seeking to enhance their…
Author(s): National Wildfire Coordinating Group (NWCG)
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Spatial wildfire suppression costs regressions have been re-estimated at a more disaggregated level for the nine Geographic Area Coordination Center (GACC’s) regions using five years of data for fires involving National Forests. Results of these…
Author(s): Armando Gonzalez-Caban, John B. Loomis, Robin Reich, Douglas B. Rideout, José J. Sánchez
Year Published:

Two of the primary global change factors that threaten shrublands worldwide are loss of native perennial herbaceous species due to inappropriate livestock grazing and loss of native shrubs due to altered fire regimes.We asked: (1) how do the…
Author(s): Jeanne C. Chambers, David Board, Bruce A. Roundy, Peter J. Weisberg
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Wildfires and prescribed fires produce emissions that are harmful to human health. These health effects, however, are difficult to quantify, likely in part due to sparse data on exposure. The ability to measure fire emissions as they reach sensitive…
Author(s): John Volckens, Scott Kelleher
Year Published:

Modeling can play a critical role in assessing and mitigating risks posed by natural hazards. These modeling efforts generally aim to characterize the occurrence, intensity, and potential consequences of natural hazards. Uncertainties surrounding…
Author(s): Matthew P. Thompson, Jord J. Warmink
Year Published:

The objectives of this study were to identify whitebark pine fire-climate interactions, and tree establishment and mortality patterns in a landscape context. Specific objectives were to : 1) develop a whitebark pine tree-ring chronology to date fire…
Author(s): Alan H. Taylor, Catherine Airey Lauvaux
Year Published:

Wildland fire suppression practices in the western United States are being widely scrutinized by policymakers and scientists as costs escalate and large fires increasingly affect social and ecological values. One potential solution is to change…
Author(s): Alan A. Ager, Ana M. G. Barros, Haiganoush K. Preisler, Michelle A. Day, Thomas A. Spies, John D. Bailey, John P. Bolte
Year Published:

Relational Risk Assessment and Management (RRAM) is about developing a new set of concepts and rapid assessment tools for assessing risk for problems that occur in inter-agency communication and coordination on complex fire events. Failures in…
Author(s): Branda Nowell, Sarah M. McCaffrey, Toddi A. Steelman
Year Published:

Forest managers across the Canadian boreal require detailed fire pattern information to support disturbance-based management. However, there are no consistent classifications of post-fire patterns, and those that exist rely on field-data that is…
Author(s): Ignacio San-Miguel, David W. Andison, Nicholas C. Coops
Year Published:

Despite large commitments of personnel and equipment to wildfire suppression, relatively little is known about the factors that affect how many resources are ordered and assigned to wildfire incidents and the variation in resources across incident…
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