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Ecosystem

Displaying 2761 - 2780 of 6066 results

As climate change alters global fire regimes, fire and forest managers must prioritize management actions that simultaneously protect sensitive resources and allow fire to maintain its ecological role. Over the last twenty years, this task has…
Author(s): Diana F. Tomback, Elizabeth R. Pansing
Year Published:

An improved understanding of atmospheric perturbations within and above a forest during a wildland fire has relevance to many aspects of wildland fires including fire spread, smoke transport and dispersion, and tree mortality. In this study, the…
Author(s): Michael T. Kiefer, Shiyuan Zhong, Warren Heilman, Joseph J. Charney, Xindi Bian
Year Published:

Accurate characterization of Carbon (C) consequences of forest disturbances and management is critical for informed climate mitigation and adaptation strategies. While research into generalized properties of the forest C cycle informs policy and…
Author(s): Feng A. Zhao, Sean P. Healey, Chengquan Huang, James P. McCarter, Chris Garrard, Sara A. Goeking, Zhiliang Zhu
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Grid-independent rate of spread results from a physics-based simulation are presented. Previously, such a numerical benchmark has been elusive owing to computational restrictions. The grid-converged results are used to systematically construct…
Author(s): K. A. M. Moinuddin, W. Mell
Year Published:

Averaging tree-ring measurements from multiple individuals is one of the most common procedures in dendrochronology. It serves to filter out noise from individual differences between trees, such as competition, height, and micro-site effects, which…
Author(s): Mario Trouillier, Marieke van der Maaten-Theunissen, Jill E. Harvey, David Wurth, Martin Schnittler, Martin Wilmking
Year Published:

To enhance understanding of how climate and humans influenced historical fire occurrence in the montane forests of Jasper National Park, we crossdated fire-scar and tree age samples from 172 plots. We tested effects of drought and climatic variation…
Author(s): Raphael D. Chavardes, Lori D. Daniels, Ze'ev Gedalof, David W. Andison
Year Published:

Wildfires, insect outbreaks, and windstorms are increasingly common forest disturbances. Post-disturbance management often involves salvage logging, i.e., the felling and removal of the affected trees; however, this practice may represent an…
Author(s): Alexandro B. Leverkus, José María Rey Benayas, Jorge Castro, Dominique Boucher, Stephen Brewer, Brandon M. Collins, Daniel C. Donato, Shawn Fraver, Barbara E. Kishchuk, Eun-Jae Lee, David B. Lindenmayer, Emanuele Lingua, Ellen Macdonald, Raffaella Marzano, Charles C. Rhoades, Alejandro A. Royo, Simon Thorn, Joseph W. Wagenbrenner, Kaysandra Waldron, Thomas Wohlgemuth, Lena Gustafsson
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Smouldering ground fires have severe environmental implications. Their main effects are the release of large amounts of carbon to the atmosphere with loses of organic soil and its biota. Quantitative data on the behaviour of smouldering wildfires…
Author(s): Elsa Pastor, I Oliveras, E. Urquiaga-Flores, J.A. Quintano-Loayza, M.I. Manta, E. Planas
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Interest in PNW forests is shifting from a focus on old-growth forests alone to include the ecological value and processes of early-seral communities. However, focusing on the alpha and omega states of a linear successional model does not account…
Author(s): Christopher J. Dunn, John D. Bailey
Year Published:

A laboratory experimental program addressing fire spread in fuel beds composed of dead foliage litter and vertically placed quasi-live branches, representative of many natural fuel complexes, was carried out for either still-air or wind conditions.…
Author(s): Carlos G. Rossa, Paulo M. Fernandes
Year Published:

Fire is returning to many conifer-dominated forests where species composition and structure have been altered by fire exclusion. Ecological effects of these fires are influenced strongly by the degree of forest change during the fire-free period.…
Author(s): Christopher D. O'Connor, Donald A. Falk, Ann M. Lynch, Thomas W. Swetnam, Craig P. Wilcox
Year Published:

Landscape exposure to multiple stressors can pose risks to human health, biodiversity, and ecosystem services. Attempts to study, control, or mitigate these stressors can strain public and private budgets. An interdisciplinary team of Pacific…
Author(s): Marie Oliver, Becky K. Kerns, John Kim, Jeffrey D. Kline
Year Published:

Forested watersheds supply drinking water for millions of people in the United States. The increased frequency and severity of wildfires during recent decades have elevated public concern regarding source water protection. Large, high-severity…
Author(s): Charles C. Rhoades, Alex Chow
Year Published:

A longer growing season with climate change is expected to increase net primary productivity of many rangeland types, especially those dominated by grasses, although responses will depend on local climate and soil conditions. Elevated atmospheric…
Author(s): Matthew C. Reeves, Mary Manning, Jeff P. DiBenedetto, Kyle Palmquist, William Lauenroth, John Bradford, Daniel Schlaepfer
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Smoke from wildland fires has a significant impact on public health and transportation safety and presents a serious complication for air regulators seeking to design effective and efficient emission control strategies to meet and maintain air…
Author(s): Shawn P. Urbanski
Year Published:

This is an article about climate change and political climate for logging in Seeley Lake, Montana.
Author(s):
Year Published:

Forest restoration often includes thinning to reduce tree density and improve ecosystem processes and function while also reducing the risk of wildfire or insect and disease outbreaks. However, one drawback of these restoration treatments is that…
Author(s): Deborah S. Page-Dumroese, Matt Busse, Jim Archuleta, Darren McAvoy, Eric Roussel
Year Published:

We present landscape simulation results contrasting effects of changing climates on forest vegetation and fire regimes in Yellowstone National Park, USA, by mid-21st century. We simulated potential changes to fire dynamics and forest characteristics…
Author(s): Jason A. Clark, Rachel A. Loehman, Robert E. Keane
Year Published:

In the last few decades, the number of people living in fire-prone ecosystems has increased, placing more people and private property at risk to future fire events. Substantial research has demonstrated consistent public support for the use of…
Author(s): Kathleen M. Rose, Eric Toman, Christine Olsen
Year Published:

Ecosystem resilience to climate change is contingent on post-disturbance plant regeneration. Sparse gymnosperm regeneration has been documented in subalpine forests following recent wildfires and compounded disturbances, both of which are increasing…
Author(s): Nathan S. Gill, Florencia Sangermano, Brian Buma, Dominik Kulakowski
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