Forest Sciences Commons^™

Assessment Of Windbreak Condition And Indicators To Renovate, Steve Rasmussen

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

A presentation covering assessment of windbreak condition and indicators to renovate.

Effects Of Ungulate Herbivory On Aspen, Cottonwood, And Willow Development Under Forest Fuels Treatment Regimes, Bryan A. Endress, Michael J. Wisdom, Martin Vavra, Catherine G. Parks, Brian L. Dick, Bridgett J. Naylor, Jennifer M. Boyd

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Herbivory by domestic and wild ungulates can dramatically affect vegetation structure, composition and dynamics in nearly every terrestrial ecosystem of the world. These effects are of particular concern in forests of western North America, where intensive herbivory by native and domestic ungulates has the potential to substantially reduce or eliminate deciduous, highly palatable species of aspen (Populus tremuloides), cottonwood (Populus trichocarpa), and willow (Salix spp.). In turn, differential herbivory pressure may favor greater establishment of unpalatable conifers that serve as ladder fuels for stand-replacing fires. The resulting high fuel loads often require silvicultural fuels reductions …

Working Trees For Communities

Working Trees (USDA-NAC)

Today, communities are challenged with accommodating new growth while maintaining the integrity of existing neighbor-hoods. Accommodating health, safety, transportation, quality of life, economics, environmental quality and infrastructure development can often lead to land use conflicts. Compromises are often needed to achieve a workable plan.

Today, community residents, businesses, rural landowners and local leaders must look beyond their own backyards. What is done by one resident or business can affect the community and the watershed. The cumulative effects of many individual actions can have significant impact on the overall landscape.

Working Trees for Communities are proven agroforestry technologies that are being …

Integrating Landis Model And A Multi-Criteria Decision-Making Approach To Evaluate Cumulative Effects Of Forest Management In The Missouri Ozarks, Usa, Zongbo Shang, Hong S. He, Weimin Xi, Stephen R. Shifley, Brian J. Palik

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Public forest management requires consideration of numerous objectives including protecting ecosystem health, sustaining habitats for native communities, providing sustainable forest products, and providing noncommodity ecosystem services. It is difficult to evaluate the long-term, cumulative effects and tradeoffs these and other associated management objectives. To demonstrate the capabilities of techniques suitable to support such evaluations we combined a spatially explicit landscape-scale, succession and disturbance model (LANDIS) with wildlife habitat suitability models and a multi-criteria decisionmaking framework to compare four management alternatives across a 700 km² area of the Mark Twain National Forest in Missouri, USA. We estimated the combined, cumulative …

Status Of Private Cypress Wetland Forests In Georgia - Alternatives For Conservation And Restoration, William Conner, Laura Fabrizio, Bill Sapp

Publications

No abstract provided.

Fuel Conditions Associated With Native And Exotic Grasses In A Subtropical Dry Forest In Puerto Rico, Jarrod M. Thaxton, Skip J. Van Bloem, Stefanie Whitmire

Publications

Exotic grasses capable of increasing frequency and intensity of anthropogenic fire have invaded subtropical and tropical dry forests worldwide. Since many dry forest trees are susceptible to fire, this can result in decline of native species and loss of forest cover. While the contribution of exotic grasses to altered fire regimes has been well documented, the role of native grasses in contributing to fuel loads in dry forest has received little attention. We assessed differences in fuel conditions among native and exotic grasses within a subtropical dry forest preserve in Puerto Rico. We quantified fine fuel loads, fuel continuity, and …

An Annual Tree Survival And Diameter Growth Model For Loblolly And Slash Pine Plantations In East Texas, Dean W. Coble, Quang V. Cao, Lewis Jordan

Faculty Publications

An annual growth model that predicts individual tree survival and diameter growth was developed for loblolly pine (Pinus taeda) and slash pine (Pinus elliottii) trees in East Texas as a function of individual-tree diameter, plantation age, basal area per acre, dominant height, quadratic mean diameter, and presence of fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme). Data from 104,035 loblolly pine and 37,515 slash pine individual tree observations collected on a 3-year cycle from 174 loblolly pine and 80 slash pine permanent plots located in plantations throughout East Texas were used in this study. The survival equation …

Use Of Aminocyclopyrachlor For Forestry Site Preparation In The Southeastern U.S., Andrew W. Ezell, Ronnie Turner, Jimmie L. Yeiser

Faculty Publications

It is not often that new chemistry is made available for use in forestry applications. Aminocyclopyrachlor is a new active ingredient which may have usefulness as a forestry herbicide. Research using this active ingredient began in 2005 and is continuing in university projects across the South. Both hardwood control efficacy and pine tolerance have been evaluated in these trials. A total of 60 different treatments have been evaluated for use in site preparation applications in Mississippi and Texas. This herbicide is effective on a number of species including some invasive exotics. It will probably not be a stand alone treatment, …

Short-Term Carbon Partitioning Fertilizer Responses Vary Among Two Full-Sib Loblolly Pine Clones, Jeremy P. Stovall, John R. Seiler, Thomas R. Fox

Faculty Publications

We investigated the effects of fertilizer application on the partitioning of gross primary productivity (GPP) between contrasting full-sib clones of Pinus taeda (L.). Our objective was to determine if fertilizer growth responses resulted from similar short-term changes to partitioning. A modeling approach incorporating respiratory carbon (C) fluxes, soil CO2 efflux (FS), and biomass was applied to a factorial design with two clones, fertilizer and control treatments, and four sequential monthly harvests of seedlings planted in a greenhouse. Partitioning was integrated over 121 days to above, belowground, and total net primary production (ANPP + BNPP = NPP), total belowground C flux …

Nest Success And Hatchling Survival Of American Alligators Within Inland Wetlands Of East Texas, Warren C. Conway, Gary Calkins, David Saalfeld

Faculty Publications

Because of liberalization of American alligator (Alligator mississippiensis) harvest management in Texas, estimates of nest success and hatchling survival for inland populations are essential for long-term, sustainable population and harvest management. To date, few studies have examined American alligator nest success and hatchling survival. We initiated a 3-year study from 2006 to 2008 to document alligator nest success and hatchling survival within several wetlands in east Texas. From June 2006 to August 2008, we located 30 nests from 3 wetlands within east Texas, where overall nest success was 44.2% (95% CI=25.1– 63.1%), irrespective of year. Nest circumference and day during …

Snowy Plover Nest Site Selection, Spatial Patterning, And Temperatures In The Southern High Plains Of Texas, David Saalfeld, Warren C. Conway, William P. Johnson, David A. Haukos

Faculty Publications

Snowy plover (Charadrius nivosus) populations have declined throughout their range, in part because of habitat degradation and poor nest success, making information regarding regionally specific nest site selection and spatial patterns important when considering habitat conservation and management guidelines. We determined nest site selection characteristics (n=80) and examined spatial patterns (n=215) of snowy plover nests in saline lakes in the Southern High Plains (SHP) of Texas. At 104 nests, we examined the influence of substrate type on nest temperatures and heat mitigation. Snowy plover nests were more likely to be found near an object, on pebble substrate, and with fewer …

Increased Uniformity By Planting Clones Will Likely Have A Minimal Effect On Inventory Costs, Curtis L. Vanderschaaf, Dean W. Coble, David B. South

Faculty Publications

When conducting inventories, reducing variability among tree diameters, heights, and ultimately volumes or biomass, can reduce the number of points/plots needed to obtain a desired level of precision. We present a simple analysis examining the potential reduction in discounted inventory costs when stand variability is decreased (via improved genetics and intensive management on a uniform soil). Sampling time might be reduced if the coefficient of variation in point volume/biomass estimates is reduced to 10% (versus 25% for genetically diverse stands). However, if this level of variability could be achieved (and depending on the desired probability and allowable percent error) discounted …

A Chronicle Of Changing American Attitudes Toward Wetlands, Matthew W. Mcbroom

Faculty Publications

No abstract provided.

East Goshen Forest Restoration Project: A Community-Wcu Partnership, Joy Fritschle, Jason Ferrell, Gerry Hertel, Steven Bukowski

East Goshen Township Forest Restoration Project Documents

No abstract provided.

A Five-Year Analysis Of Carbon Stock Plots In The Gordon Natural Area’S Big Woods, Cathy Spahr, Chad Hudson, Andy Tamez

Forest Carbon Storage Study Documents

No abstract provided.

Revisiting The Homogenization Of Dammed Rivers In The Southeastern Us, Ryan A. Mcmanamay, Donald J. Orth, Charles A. Dolloff

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

For some time, ecologists have attempted to make generalizations concerning how disturbances influence natural ecosystems, especially river systems. The existing literature suggests that dams homogenize the hydrologic variability of rivers. However, this might insinuate that dams affect river systems similarly despite a large gradient in natural hydrologic character. In order to evaluate patterns in dam-regulated hydrology and associated ecological relationships, a broad framework is needed. Flow classes, or groups of streams that share similar hydrology, may provide a framework to evaluate the relative effects of dam regulation on natural flow dynamics. The purpose of this study was to use a …

Terrestrial Biosphere Models Need Better Representation Of Vegetation Phenology: Results From The North American Carbon Program Site Synthesis, Andrew D. Richardson, Ryan S. Anderson, M. Altaf Arain, Alan G. Barr, G. Bohrer, Guangsheng Chen, Jing M. Chen, Philippe Ciais, Kenneth J. Davis, Ankur R. Desai, Michael C. Dietze, Danilo Dragoni, Steven R. Garrity, Christopher M. Gough, Robert Grant, David Y. Hollinger, Hank A. Margolis, Harry Mccaughey, Mirco Migliavacca, Russell K. Monson, J. William Munger, Benjamin Poulter, Brett M. Raczka, Daniel M. Ricciuto, Alok K. Sahoo, Kevin Schaefer, Hanqin Tian, Rodrigo Vargas, Hans Verbeeck, Jingfeng Xiao, Yongkang Xue

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Phenology, by controlling the seasonal activity of vegetation on the land surface, plays a fundamental role in regulating photosynthesis and other ecosystem processes, as well as competitive interactions and feedbacks to the climate system. We conducted an analysis to evaluate the representation of phenology, and the associated seasonality of ecosystem- scale CO₂ exchange, in 14 models participating in the North American Carbon Program Site Synthesis. Model predictions were evaluated using long-term measurements (emphasizing the period 2000–2006) from 10 forested sites within the AmeriFlux and Fluxnet-Canada networks. In deciduous forests, almost all models consistently predicted that the growing season started …

Timber Talk, Vol. 50, No. 1, February 1, 2012

Timber Talk: Nebraska Forest Industry Newsletter

Lumber Market News; Hardwood Lumber Price Trends—Green; Hardwood Lumber Price Trends—Kiln Dried; Hardwood Lumber Market History—Green; Tribute to a Forester; Cracking the Walnut Case; Woody Biomass Facts: A Look at the Myths Regarding a Sustainable Energy Source; Nebraska Forestry Industry Spotlight.....6 NFS Welcomes New M&U Forester; The Trading Post; Timber Sales; How Did Scragg Mills Get Named?

Response Of Ectomycorrhizal Fungi To Inorganic And Organic Forms Of Nitrogen And Phosphorus, Christa M. Luokkala

Dissertations, Master's Theses and Master's Reports - Open

The nutrient uptake response of ectomycorrhizal fungi (ECM) to different nutrient substrates is a driving force in ecosystem nutrient cycling. We hypothesized that taxa from low nitrogen (N) soils would be more likely to use organic N compared to taxa from high N soils, and that taxa from high N would be more likely to use organic phosphorus (P) sources when compared to the ECM dominant in low N soils. This study focuses on the growth response of ECM species collected over a N gradient to different forms of N and P nutrient substrates and whether ECM growth in a …

Working Trees For Livestock

Working Trees (USDA-NAC)

Conventional wisdom in the past has been that livestock and trees can’t co-exist. Yet moderm agricultural practice is showing their livestock and trees not only can co-exist, but, if properly managed, can provide additional income from land formerly used for a single crop.

Trees can provide livestock with protection from cold wind and blowing snow in winter, as well as from the hot sun and drying winds of summer. And, if commercially desirable timber or nut trees are planted, landowners can enjoy significant additional income from this diverse use of their land.

This publication will acquaint you with some of …