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Ecosystem

Displaying 3321 - 3340 of 5892 results

1. Anthropogenic global change compromises forest resilience, with profound impacts to ecosystem functions and services. This synthesis paper re flects on the current understanding of forest resilience and potential tipping points under environmental…
Author(s): Christopher P. O. Reyer, Niels Brouwers, Anja Rammig, Barry W. Brook, Jackie Epila, Robert F. Grant, Milena Holmgren, Fanny Langerwisch, Sebastian Leuzinger, Wolfgang Lucht, Belinda Medlyn, Marion Pfeifer, Jorg Steinkamp, Mark C. Vanderwel, Hans Verbeeck, Dora M. Villela
Year Published:

Analyses to identify and relate trends in wildfire activity to factors such as climate, population, land use or land cover and wildland fire policy are increasingly popular in the United States. There is a wealth of US wildfire activity data…
Author(s): Karen C. Short
Year Published:

Several post-wildfire debris flows and other landslides occurred after the extreme wildfire season of 2003 in the southern interior of British Columbia. Such events had not been previously reported in Canada, although they are common in lower…
Author(s): Peter Jordan
Year Published:

Hazardous fuel reduction treatments conducted both through prescribed fire and mechanical means are a critical part of the mitigation of wildland fire risk in the United States. The US Federal Government has spent an average of $500t million each…
Author(s): Eric Mueller, Nick Skowronski, Kenneth L. Clark, Robert L. Kremens, Michael R. Gallagher, Jan C. Thomas, M. El Houssami, Alexander I. Filkov, Bret W. Butler, John L. Hom, William E. Mell, Albert Simeoni
Year Published:

ABSTRACT Aim: Determine if differences in the climatic niche between conspecific adult and juvenile trees of the western Unites States vary by species traits and to assess if forest canopies moderate the sensitivity of juvenile trees to climatic…
Author(s): Solomon Z. Dobrowski, Alan Swanson, John T. Abatzoglou, Zachary A. Holden, Hugh Safford, Michael K. Schwartz, Daniel G. Gavin
Year Published:

We develop a novel risk assessment approach that integrates complementary, yet distinct, spatial modeling approaches currently used in wildfire risk assessment. Motivation for this work stems largely from limitations of existing stochastic wildfire…
Author(s): Matthew P. Thompson, Julie W. Gilbertson-Day, Joe H. Scott
Year Published:

Ecological niche models predict plant responses to climate change by circumscribing species distributions within a multivariate environmental framework. Most projections based on modern bioclimatic correlations imply that high-elevation species are…
Author(s): Virginia Iglesias, Teresa R. Krause, Cathy L. Whitlock
Year Published:

Many semi-arid plant communities in western North America are dominated by big sagebrush. These ecosystems are being reduced in extent and quality due to economic development, invasive species, and climate change. These pervasive modifications have…
Author(s): Daniel Schlaepfer, Kyle A. Taylor, Victoria E. Pennington, Kellen N. Nelson, Trace E. Martyn, Caitlin M. Rottler, William Lauenroth, John Bradford
Year Published:

Scores of communities nationwide experience the impacts of wildfire every year; thousands of residents evacuate; infrastructure is threatened; many communities, especially those dependent on tourism or natural resources, are economically…
Author(s): Pam Leschak
Year Published:

Prescribed burning as a fuel treatment seeks to moderate wildfire impacts and decreases the areal extent of wildfires by increasing the effectiveness of fire suppression. Assessment of prescribed burning effectiveness is frequently anecdotal or…
Author(s): Paulo M. Fernandes
Year Published:

Wildland fuels are a critical factor in fire management because they are the one factor that managers can control. However, fuels have always been defined, described, and quantified in the context of inputs to fire behavior models. Wildland fuel…
Author(s): Robert E. Keane
Year Published:

Modeling the behavior of crown fires is challenging due to the complex set of coupled processes that drive the characteristics of a spreading wildfire and the large range of spatial and temporal scales over which these processes occur. Detailed…
Author(s): Chad M. Hoffman, J. Ziegler, Rodman Linn, William E. Mell, Carolyn Hull Sieg, F. Pimont
Year Published:

The aims of this research were to develop and test a scale used to measure leadership in wildland firefighting using two samples of USA wildland firefighters. The first collection of data occurred in the spring and early summer and consisted of an…
Author(s): Alexis L. Waldron, David P. Schary, Bradley J. Cardinal
Year Published:

Despite highly specialised and capable emergency management systems, ordinary citizens are usually first on the scene in an emergency or disaster, and remain long after official services have ceased. Citizens often play vital roles in helping those…
Author(s): Joshua Whittaker, Blythe McLennan, J. Handmer
Year Published:

Wildfire suppression combines multiple objectives and dynamic fire behavior to form a complex problem for decision makers. This paper presents a mixed integer program designed to explore integrating spatial fire behavior and suppression placement…
Author(s): Erin J. Belval, Yu Wei, Michael Bevers
Year Published:

Regional air quality simulations were performed to evaluate the contributions of wildland fires to inter-annual variability of black carbon (BC) concentrations and to assess the contributions of wildfires vs. prescribed fires to BC concentrations…
Author(s): Serena H. Chung, Brian K. Lamb, Farren Herron-Thorpe, Rodrigo Gonzalez-Abraham, Vikram Ravi, Tsengel Nergui, Joseph K. Vaughan, Narasimhan K. Larkin, Tara Strand
Year Published:

We developed a new climate-sensitive vegetation state-and-transition simulation model (CV-STSM) to simulate future vegetation at a fine spatial grain commensurate with the scales of human land-use decisions, and under the joint influences of…
Author(s): Gabriel I. Yospin, Scott D. Bridgham, Ronald P. Neilson, John P. Bolte, Dominique Bachelet, Peter J. Gould, Constance A. Harrington, Jane A. Kertis, Cody Evers, Bart R. Johnson
Year Published:

Research across a variety of risk domains finds that the risk perceptions of professionals and the public differ. Such risk perception gaps occur if professionals and the public understand individual risk factors differently or if they aggregate…
Author(s): James R. Meldrum, Patricia A. Champ, Hannah Brenkert-Smith, Travis Warziniack, Christopher M. Barth, Lilia C. Falk
Year Published:

Fire Effects and Management: Fire of any severity generally kills white spruce. After fire, white spruce typically establishes from seed from trees along fire edges or unburned trees within the burn area. Establishment depends on seed availability,…
Author(s): Ilana L. Abrahamson
Year Published:

Globally, wildfire size, severity, and frequency have been increasing, as have related fatalities and taxpayer-funded firefighting costs (1). In most accessible forests, wildfire response prioritizes suppression because fires are easier and cheaper…
Author(s): Malcolm P. North, Scott L. Stephens, Brandon M. Collins, James K. Agee, Gregory H. Aplet, Jerry F. Franklin, Peter Z. Fule
Year Published: