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Articles 31 - 60 of 357
Full-Text Articles in Forest Sciences
Mojave Applied Ecology Notes Fall 2009, Tom Monaco, Scott R. Abella, Amber Lee, James E. Deacon
Mojave Applied Ecology Notes Fall 2009, Tom Monaco, Scott R. Abella, Amber Lee, James E. Deacon
Mojave Applied Ecology Notes
USDA working to manage invasive annual grasses, effects of heat and smoke on red brome soil seed bank, how burial depth and substrate affect germination of Sahara mustard and red brome, environmental effects of the southern Nevada groundwater project
Smokejumper Obituary: Chapman, Donald L. (Cave Junction 1953), National Smokejumper Association
Smokejumper Obituary: Chapman, Donald L. (Cave Junction 1953), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Berg, Clayton Victor (Missoula 1952), National Smokejumper Association
Smokejumper Obituary: Berg, Clayton Victor (Missoula 1952), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Thach, John O. (Cave Junction 1946), National Smokejumper Association
Smokejumper Obituary: Thach, John O. (Cave Junction 1946), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Kirk, Edward N. (Missoula 1944), National Smokejumper Association
Smokejumper Obituary: Kirk, Edward N. (Missoula 1944), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Evans, John Roger (Missoula 1950), National Smokejumper Association
Smokejumper Obituary: Evans, John Roger (Missoula 1950), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Making Biomass Pay: Obstacles And Opportunities, Gail Wells
Making Biomass Pay: Obstacles And Opportunities, Gail Wells
Joint Fire Science Program Digests
Removing hazardous fuels to reduce the risk of wildfire has become a priority for land managers across the United States. Utilizing biomass taken from forests to cover the cost of fuel reduction is an attractive ideal. Effective utilization could also address important national challenges such as improving forest health, increasing domestic energy supplies, reducing carbon emissions, and revitalizing rural economies. However, getting woody biomass from the forest to the consumer is economically and logistically difficult, and efforts to make biomass utilization profitable have been disappointing so far. JFSP-funded researchers have found that, while there is no recipe for building a …
Silviculture Certification Revalidation Case Studey : An Assessment Of Aspen Regeneration By Fire Intensity Following Prescribed Burning On Low Productivity Sites In Southwest Idaho And/Or A Simplistic Model Showing Aspen Sprouting Response By Varying Degrees Of Fire Intensity As Defined By Degree Of Aspen Crown-Kill Within The Lime Creek Aspen Restoration Project Area, Steven L. Williams
Aspen Bibliography
This Case Study is prepared for revalidation as a certified silviculturist in the Intermountain Region. When I first began working on this study, I anticipated that prescribed fire would produce variable degrees of aspen crown-kill and that differences in aspen sprouting would exist across the project area. What I observed was that although variable degrees of aspen crown-kill do exist, their distribution and relative amounts is more a function of prescribed fire ignition than of vegetation conditions. Very nearly full aspen crown-kill occurs with any fire that sustains itself enough to carry through the vegetation. Where prescribed fire is employed, …
Smokejumper Obituary: Frost, William W. (Pilot 0000), National Smokejumper Association
Smokejumper Obituary: Frost, William W. (Pilot 0000), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Miller, Gordon H. (Mccall 1944), National Smokejumper Association
Smokejumper Obituary: Miller, Gordon H. (Mccall 1944), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Ice Storm Effects On The Canopy Structure Of A Northern Hardwood Forest After 8 Years, Brian C. Weeks, Steven P. Hamburg, Matthew A. Vadeboncoeur
Ice Storm Effects On The Canopy Structure Of A Northern Hardwood Forest After 8 Years, Brian C. Weeks, Steven P. Hamburg, Matthew A. Vadeboncoeur
All Materials
Ice storms can cause severe damage to forest canopies, resulting in differential mortality among tree species and size classes and leading to long-lasting changes in the vertical structure and composition of the forest. An intense ice storm in 1998 damaged large areas of the northern hardwood forest, including much of the Hubbard Brook Experimental Forest, New Hampshire (USA). Following up on detailed poststorm assessments, we measured changes in the vertical structure of the forest canopy 8 years poststorm. We focused on how the presence of disease-induced advance regeneration of American beech (Fagus grandifolia Ehrh.) has affected canopy structure in the …
Smokejumper Obituary: Strohmyer, Richard Allen (Missoula 1977), National Smokejumper Association
Smokejumper Obituary: Strohmyer, Richard Allen (Missoula 1977), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Noel, L. Edward (Missoula 1959), National Smokejumper Association
Smokejumper Obituary: Noel, L. Edward (Missoula 1959), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Increasing The Reliability Of Ecological Models Using Modern Software Engineering Techniques, Robert M. Scheller, Brian R. Sturtevant, Eric J. Gustafson, Brendan C. Ward, David J. Mladenoff
Increasing The Reliability Of Ecological Models Using Modern Software Engineering Techniques, Robert M. Scheller, Brian R. Sturtevant, Eric J. Gustafson, Brendan C. Ward, David J. Mladenoff
Environmental Science and Management Faculty Publications and Presentations
Modern software development techniques are largely unknown to ecologists. Typically, ecological models and other software tools are developed for limited research purposes, and additional capabilities are added later, usually in an ad hoc manner. Modern software engineering techniques can substantially increase scientific rigor and confidence in ecological models and tools. These techniques have the potential to transform how ecological software is conceived and developed, improve precision, reduce errors, and increase scientific credibility. We describe our re-engineering of the forest landscape model LANDIS (LANdscape DIsturbance and Succession) to illustrate the advantages of using common software engineering practices.
Smokejumper Obituary: Yoder, Floyd F. (Cave Junction 1943), National Smokejumper Association
Smokejumper Obituary: Yoder, Floyd F. (Cave Junction 1943), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Community Wildfire Protection Plans: Reducing Wildfire Hazards In The Wildland Urban Interface, Gail Wells
Community Wildfire Protection Plans: Reducing Wildfire Hazards In The Wildland Urban Interface, Gail Wells
Joint Fire Science Program Digests
The 2003 Healthy Forests Restoration Act calls for local communities in the wildland-urban interface to collaborate on developing Community Wildfire Protection Plans (CWPPs) to reduce their wildfire hazard. To craft a successful CWPP, a community must collaborate effectively. A Joint Fire Science Program-sponsored research team studied 15 communities as they developed CWPPs. They found that social networks, learning communities, and community capacity were key indicators of success, and that working together on a CWPP can enhance a community’s capacity to collaborate, helping it address future challenges more skillfully.
Assessing Organic Matter Breakdown And Associated Macroinvertebrate Community Structure In Headwater Streams: Effects Of Hydrologic Gradients And Upland Timber Harvesting, Miller Scott Jarrell
Assessing Organic Matter Breakdown And Associated Macroinvertebrate Community Structure In Headwater Streams: Effects Of Hydrologic Gradients And Upland Timber Harvesting, Miller Scott Jarrell
Masters Theses & Specialist Projects
I examined the effects of hydrologic gradients and upland timber harvesting with different streamside management zone widths on yellow-poplar (Liriodendron tulipifera) processing and the associated macroinvertebrate community structure in the Cumberland Plateau ecophysic region, U.S.A. Prior to upland timber harvesting, 5.0 ± 0.1 g yellow-poplar leaf packs were constructed, zip-tied to gutter nails, and placed into 7 perennial and 6 temporary stream reaches with similar physiochemical and geomorphic characteristics. From December 2007 to May 2008, 3–5 leaf packs were collected per reach monthly. I found significant differences in the functional feeding group composition. Temporary reaches contained higher shredder, gathering-collector, predator, …
Are “Quantitative” Pits Still Necessary At Hubbard Brook?, Chris E. Johnson
Are “Quantitative” Pits Still Necessary At Hubbard Brook?, Chris E. Johnson
Civil and Environmental Engineering - All Scholarship
No abstract provided.
Smokejumper Obituary: Eldridge, Timothy G. (Missoula 1982), National Smokejumper Association
Smokejumper Obituary: Eldridge, Timothy G. (Missoula 1982), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond, VA.
Smokejumper Obituary: Tyler, Donald W. (Pendleton 1945), National Smokejumper Association
Smokejumper Obituary: Tyler, Donald W. (Pendleton 1945), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Murray, John P. Bup (Missoula 2000), National Smokejumper Association
Smokejumper Obituary: Murray, John P. Bup (Missoula 2000), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Jensen, Leland M. "Hardrock" (Mccall 1969), National Smokejumper Association
Smokejumper Obituary: Jensen, Leland M. "Hardrock" (Mccall 1969), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Terrill, William R. "Bill" (Missoula 1973), National Smokejumper Association
Smokejumper Obituary: Terrill, William R. "Bill" (Missoula 1973), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Fuel Loads, Fire Severity, And Tree Mortality In Florida Keys Pine Forests, Jay Sah, Mike S. Ross, Danielle Ogarcak, Jim R. Snyder
Fuel Loads, Fire Severity, And Tree Mortality In Florida Keys Pine Forests, Jay Sah, Mike S. Ross, Danielle Ogarcak, Jim R. Snyder
North American Forest Ecology Workshop
In fire dependent forested ecosystems, fire managers are greatly interested in predicting the consequences of their management-oriented prescribed burnings on post-fire tree mortality. While fire intensity is believed to be a strong predictor of tree mortality, fire behavior itself largely depends on fuel characteristics, including both their structure and spatial distribution. We examined the type and distribution of fuels, their effects on fire behavior, and the effects of fire on tree mortality in slash pine forests in the Florida Keys. We conducted a burning experiment in six blocks, and burned eleven plots, three in winter and eight in summer, over …
Overstory Dynamics In An Uncut Pine-Hardwood Stand: Lessons From Seventy Years Of Passive Management, Don Bragg, Michael G. Shelton
Overstory Dynamics In An Uncut Pine-Hardwood Stand: Lessons From Seventy Years Of Passive Management, Don Bragg, Michael G. Shelton
North American Forest Ecology Workshop
Long-term demonstration projects on experimental forests can be adapted from their original goals to provide insights into contemporary research questions. For instance, a 32.4-hectare cutover parcel on the Crossett Experimental Forest, the eventual Reynolds Research Natural Area (RRNA), was reserved in 1936 to act as a control for more intensively managed study areas. Over the last 70+ years, the RRNA has been allow to develop under 'natural' conditions that include no harvesting or other human interventions-with the notable exception of fire control. From 1937 until the most recent measurement in 2007, overall stand basal increased from about 20 to 36 …
What Drives Decomposition Rates Of Coarse Woody Debris (Cwd)?, Steffen Herrmann, Jurgen Bauhus
What Drives Decomposition Rates Of Coarse Woody Debris (Cwd)?, Steffen Herrmann, Jurgen Bauhus
North American Forest Ecology Workshop
Currently increasing efforts are made to manage CWD as a habitat component and a carbon store in forest ecosystems. For this a basic understanding of patterns and rates of dead wood decomposition in different forests is crucial. The decomposition rate of CWD is mainly dependent on climatic (wood temperature, wood moisture) and substrate specific (tree species, decay stage, diameter) variables. Here, we analysed the influence of these factors using a combined approach. 1) We assessed the decay rate of Fagus sylvatica, Picea abies and Pinus sylvestris in three diameter classes (10-20 cm, 20-40 cm, >40 cm) along a climatic/altitudinal gradient …
Seed Release In Lodgepole Pine Forests After Mountain Pine Beetle Outbreak, Francios Teste, Vic J. Lieffers, Simon M. Landhausser
Seed Release In Lodgepole Pine Forests After Mountain Pine Beetle Outbreak, Francios Teste, Vic J. Lieffers, Simon M. Landhausser
North American Forest Ecology Workshop
Serotinous lodgepole pine (Pinus contorta var. latifolia) usually regenerates after fire or harvesting provided conditions that are warm enough to open the cones. There are concerns that large-scale stand mortality due to mountain pine beetle (MPB) outbreak could greatly reduce natural regeneration of lodgepole pine because the closed cones are held in place in the tree canopy without any seed release. We selected 15 stands (five gray-attacked, five red-attacked, and five green) in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia to determine loss of canopy seed via breakage of twig-bearing cones and cone opening (i.e., loss of serotiny) throughout …
Potential Effects Of Climate Change On Mixed Severity Fire Regimes, Jessica Halofsky, Dave L. Peterson
Potential Effects Of Climate Change On Mixed Severity Fire Regimes, Jessica Halofsky, Dave L. Peterson
North American Forest Ecology Workshop
The frequency, severity, and extent of wildfire are strongly related to climate, and increasing temperatures with climate change will likely lead to changes in fire regimes in many types of ecosystems. Increased spring and summer temperatures with climate change will result in relatively early snowmelt, lower summer soil and fuel moisture, and longer fire seasons in the West. These conditions will lead to increased fire frequency and extent. Higher temperatures may also interact with vegetation and fuel characteristics to increase fire intensity and severity. Mixed severity fire regimes may be uniquely influenced by these climate-induced changes in the frequency, extent, …
Assessment Of Prescribed Burning Effects In Paludified Black Spruce Forests In Ontario’S Clay Belt Region, Sebastien Renard, Sylvie Gauthier, Nicole Fenton, Yves Bergeron, David Pare
Assessment Of Prescribed Burning Effects In Paludified Black Spruce Forests In Ontario’S Clay Belt Region, Sebastien Renard, Sylvie Gauthier, Nicole Fenton, Yves Bergeron, David Pare
North American Forest Ecology Workshop
Paludification, the accumulation of poorly decomposed organic matter principally originating from Sphagnum, transforms black spruce forests to forested peatlands in the prolonged absence of fire. High-severity wildfires reverse this process by burning the organic matter layer and thus restart forest succession; in contrast low severity wildfires remove only the tree layer and do not reduce paludification. On the Ontario Clay Belt, a physiogeographic region prone to paludification due to its cold climate and poor drainage, current forest harvest practices (Careful Logging Around Advanced Growth; CLAAG) mimic low severity fires by removing trees but lacking forest floor and soil disturbances caused …