Life Sciences Commons^™

The Influence Of Selected Wood Characteristics And Composites Production Parameters On The Sorption Behavior Of Wood Materials, Trairat Neimsuwan

Doctoral Dissertations

The goal of this research was to investigate the influence of selected wood characteristics and composites production parameters on the sorption behavior of wood materials. A better understanding of the sorption behavior of different wood structures and types could be useful in protecting wood against wood deterioration. The differences among tree ring locations within the stem cross-section have not been explained in terms of sorption behavior. The purpose of the first task was to investigate the effect of differences among earlywood, latewood, and tree ring location within the stem crosssection on the water vapor sorption. A loblolly pine (Pinus …

Tb196: Temperature, Soil Moisture, And Streamflow At The Bear Brook Watershed In Maine (Bbwm), Ivan J. Fernandez, Joseph E. Karem, Stephen A. Norton, Lindsey E. Rustad

Technical Bulletins

The Bear Brook Watershed in Maine is a whole-ecosystem chemical manipulation initiated in 1987 to study the effects of acid deposition on forests and surface waters. The focus of this research was to understand the biogeochemical response of watersheds with emphasis on chemistry and hydrology. In 2001 a program was initiated to provide more detailed measurements of temperature and moisture to examine critical linkages amongst chemical, biological, and physical processes that ultimately work together to define ecosystem function. The purpose of this publication is to provide data from the initial phase of soil temperature, air temperature, and soil moisture measurements …

Pb1774 Technical Guide To Crop Tree Release In Hardwood Forests, The University Of Tennessee Agricultural Extension Service

Forestry, Trees, and Timber

Crop tree release (CTR) is a widely applicable silvicultural technique used to enhance the performance of individual trees. It offers flexibility in that it can be applied on small or large properties, and with certain modifications, it can be applied as a precommercial or commercial operation. By favoring the development of selected crop trees within a hardwood stand, the landowner can meet a variety of area-wide management objectives such as wildlife habitat, recreation, timber value, aesthetic beauty and species diversity.

CTR can be applied at various stages of development, including sapling, pole and sawtimber stands, depending on the specific opportunities …

Gordie News, December 2007, West Chester University Of Pennsylvania

Gordon Natural Area History & Strategic Plan Documents

No abstract provided.

Monitoring Old Growth In Frequent-Fire Landscapes, Carl E. Fiedler, Peter Friederici, Mark Petruncio

Forest Management Faculty Publications

In this article, we discuss how to monitor the structural and functional attributes of old growth, as well as its associated plant communities and wildlife, both to determine the possible need for treatment and to assess post-treatment progress toward desired conditions. Monitoring can be used to detect conditions (or agents) that threaten existing old growth and also to document indicators of healthy, functioning old-growth systems.

Managing For Old Growth In Frequent-Fire Landscapes, Carl E. Fiedler, Peter Friederici, Mark Petruncio, Charles Denton, W. David Hacker

Forest Management Faculty Publications

There is no one-size-fits-all approach to managing frequent-fire, old-growth forests. However, there are general guidelines to follow: 1) set objectives for both structure (tree density, diameter distribution, tree species composition, spatial arrangement, amount of coarse woody debris) and function (nutrient cycling, desired tree species regeneration); 2) prioritize treatments according to ecological, economic, and social needs and risks; 3) identify the potential treatments (natural fire, prescribed fire, silvicultural cutting) that best meet the objectives and scale of the project; and 4) implement the treatment (s). We discuss each of these guidelines in this article.

Review: Wild Trees: A Story Of Passion And Daring, Karen Minton

Georgia Library Quarterly

Review of the non-fiction book "Wild Trees: A Story of Passion and Daring," by Richard Preston.

Smokejumper Obituary: Lewis, Tedford P. (Missoula 1943), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Biomass And Biofuels In Maine: Estimating Supplies For Expanding The Forest Products Industry, Jonathan Rubin, Kate Dickerson, Jacob Kavkewitz

Energy & the Environment

This paper estimates the renewable energy potential of Maine’s forest resources, and how much energy these resources could potentially provide the state. Using the most recent state-specific data available, and a methodology similar to the Billion Tons Report, we find that ethanol production from Maine’s forest residues could potentially provide 18% of Maine’s transportation (gasoline) fuels with a fermentation wood to ethanol process. Making Fischer-Tropsch diesel (F-T diesel) using forest residues can replace 39% of Maine’s petro-diesel consumption. Actual levels of biofuels that can be produced will depend on conversion factors and forestry residue removals that are subject to uncertainty.

Gordie News, November 2007, West Chester University Of Pennsylvania

Gordon Natural Area History & Strategic Plan Documents

No abstract provided.

The Ecological Significance Of The Herbaceous Layer In Temperate Forest Ecosystems, Frank S. Gilliam

Biological Sciences Faculty Research

Despite a growing awareness that the herbaceous layer serves a special role in maintaining the structure and function of forests, this stratum remainsan underappreciated aspect of forest ecosystems. In this article I review and synthesize information concerning the herb layer’s structure,composition, and dynamics to emphasize its role as an integral component of forest ecosystems. Because species diversity is highest in the herb layeramong all forest strata, forest biodiversity is largely a function of the herb-layer community. Competitive interactions within the herb layer candetermine the initial success of plants occupying higher strata, including the regeneration of dominant overstory tree species. Furthermore, …

Smokejumper Obituary: Lowman, Ben J. (Missoula 1968), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Weinmann, Harold J. "Hal" (North Cascades 1947), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Terrestrial Gastropod Responses To An Ecosystem-Level Calcium Manipulation In A Northern Hardwood Forest, Monica A. Skeldon, Matthew A. Vadeboncoeur, Steven P. Hamburg, Joel D. Blum

Earth Systems Research Center

The effects of acid deposition on soil calcium (Ca), and in turn on land snail populations, have been of heightened concern for several decades. We compiled a 10 year record (1997–2006) of gastropod abundance on two small watersheds at the Hubbard Brook Experimental Forest, one of which was treated with a Ca addition in 1999. In years 3–7 post Ca addition, snail abundance in the treated watershed was 73% higher than in the reference area (p < 0.001); there was no significant difference in the 3 years prior to treatment, and no significant difference in slug abundance in any year. We analyzed relationships between snail density and microsite spatial variation in leaf-litter Ca concentration, litter-layer thickness, tree species composition, slope, dead wood, and forest-floor light level. We found that snail abundance was significantly correlated with litter Ca concentration (p < 0.001) and negatively correlated with the importance value of American beech (p = 0.05). Isotopic-tracer analysis indicated that, on average, 76% of Ca in snail shells 5 years post treatment was derived from the added Ca. However, interannual variation in snail numbers indicates that other factors beyond available Ca have a strong influence on snail abundance.

Gordie News, October 2007, West Chester University Of Pennsylvania

Gordon Natural Area History & Strategic Plan Documents

No abstract provided.

Community Forestry In Oaxaca: An Assessment Of The Level Of Autonomy In Forest Decision-Making And Its Environmental And Economic Importance, Peter Gill

Independent Study Project (ISP) Collection

No abstract provided.

Smokejumper Obituary: Elliott, Jack B. (Mccall 1947), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Davis, John T. (North Cascades 1966), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Cramer, Robert G. (Missoula 1946), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Meeting Minutes, September 7th, 2007, National Smokejumper Association Board Of Directors

National Smokejumper Association Meeting Minutes

Agenda: NCSB Reunion Update.; Minutes of the Last Meeting.; Treasurer's Report.; Investments.; Life Membership.; Membership Update.; Trails Program.; National Smokejumper Center (NSC) Update.; Boise Reunion Recommendations.; Seeley Lake Ranger District Opportunity.; History Program.; Next year's Meetings.; Potential Reunion Locations.;

Gordie News, September 2007, West Chester University Of Pennsylvania

Gordon Natural Area History & Strategic Plan Documents

No abstract provided.

Validation And Refinement Of Allometric Equations For Roots Of Northern Hardwoods, Matthew A. Vadeboncoeur, Steven P. Hamburg, Ruth D. Yanai

Earth Systems Research Center

The allometric equations developed by Whittaker et al. (1974. Ecol. Monogr. 44: 233–252), at the Hubbard Brook Experimental Forest have been used to estimate biomass and productivity in northern hardwood forest systems for over three decades. Few other species-specific allometric estimates of belowground biomass are available because of the difficulty in collecting the data, and such equations are rarely validated. Using previously unpublished data from Whittaker’s sampling effort, we extended the equations to predict the root crown and lateral root components for the three dominant species of the northern hardwood forest: American beech (Fagus grandifolia Ehrh.), yellow birch (Betula alleghaniensis …

Working Trees For Wildlife

Working Trees (USDA-NAC)

Sustaining quality wildlife habitat is challenging, especially where agricultural fields offer little plant diversity and in suburban areas where human development has fragmented the landscape.

Increasingly, these areas are managed primarily for people. But, an amazing variety of animals call the same areas home and depend on us to make sure that their needs are met.

Working Trees are trees and shrubs, especially native species, that are in the right place to do a specific job. Whether Working Trees come in the form of a windbreak to enhance crop or livestock production or a riparian forest buffer to filter storm …

Smokejumper Obituary: Kahler, Lee (Ncsb 1946), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Whitt, Charles R. "Chuck" (Mccall 1946), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: French, Thomas L. (Mccall 1975), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Clark, James Robert (Missoula 1964), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Past Fire Regimes Of Table Mountain Pine (Pinus Pungens L.) Stands In The Central Appalachian Mountains, Virginia, U.S.A., Georgina Deweese

Doctoral Dissertations

Table Mountain pine is an Appalachian endemic that occurs in a patchy distribution from Georgia to Pennsylvania and is prolific at sites with a history of fire disturbance. The purpose of this dissertation was to reconstruct the fire regimes of Table Mountain pine stands in the Jefferson National Forest, Virginia. Sections from firescarred Table Mountain pines were collected at four sites to analyze fire history, while increment cores and stand composition information were collected from macroplots within each fire history site to investigate the possible influence of fires that were more ecologically severe. Results show that fire was frequent before …

Establishment, Growth, Spread, And Ecological Impacts Of Microstegium Vimineum In Central Hardwood Forests, Jordan M. Marshall

Doctoral Dissertations

Microstegium vimineum is an annual exotic grass common through the Southeastern United States. Adding M. vimineum to native plant communities may alter future forest composition through inhibiting the growth and influencing recruitment of seedlings into larger size classes, as well as significantly altering vertical structure and community richness, which may influence the distribution of insects.

The main objectives of these studies were to 1) establish how different mineral soil and litter disturbances, in combination with various forest canopy coverage, influence the establishment, growth, and spread of M. vimineum, 2) quantify effects of competition between M. vimineum and native hardwood …

An Experimental Release Of Elk Into Great Smoky Mountains National Park, Jennifer Lynn Murrow

Doctoral Dissertations

I conducted 6 years of field work to evaluate the habitat use and population dynamics of an experimental release of elk (Cervus elaphus) into Great Smoky Mountains National Park (Park). Elk exhibited relatively small home ranges (female: 10.4 km² and males: 22.4 km²) and movement distances decreased over time. I calculated survival rates (x = 0.73–0.93) and litter production rates (x = 0.73) for the population. To assess the potential for a long-term elk population, I incorporated those vital rates into the population modeling software Riskman and tested its sensitivity to any given …