Forest Management Commons^™

Modeling Thinning In East Texas Loblolly And Slash Pine Plantations, Dean W. Coble

Faculty Publications

A new thinning model was proposed for loblolly pine (Pinus taeda L.) and slash pine (P. elliottii Engelm.) plantations in east Texas. The new model follows the index of suppression methodology introduced by Pienaar (1979). It was implemented in a new whole stand growth model for loblolly and slash pine plantations in east Texas (Coble 2009). The new thinning model performed similarly to existing Pienaar-type models for east Texas and the Southeastern United States across a range of site quality. The predicted basal area development consistently approached the unthinned counterpart, which is consistent with results from other studies. The new …

Seasonal Variation In Offspring Sex Ratio In The Snowy Plover, Sarah T. Saalfeld, Warren C. Conway, David A. Haukos, William P. Johnson

Faculty Publications

The Snowy Plover (Charadrius nivosus) is unique in being a determinate layer of an odd modal clutch size and in having a variable mating system in which female brood desertion occurs regularly. These traits make determining Snowy Plover offspring sex ratios important not only for long-term population stability, as the species is of conservation concern, but also for application to sex allocation theory. In this study, we determined Snowy Plover offspring sex ratios, examined differential costs of producing male and female offspring, and evaluated sex ratio variation in relation to maternal condition, habitat condition, and time during the …

Using Arcpy To Automate Making Thematic Map Books: Two Cases, Yanli Zhang, Daniel Unger, Jason Grogan, Brian P. Oswald, John Lanham

Faculty Publications

No abstract provided.

Effects Of Treatments Using Mat-28 For Pine Site Preparation, Andrew W. Ezell, Jimmie L. Yeiser, Pat Minogue

Faculty Publications

Site preparation for pine plantation establishment continues to be the principal use of herbicides in the South. Due to the timing of the work and the cost involved, these applications are critical in both biological and economic terms. In an effort to improve performance in both considerations, a study was undertaken to evaluate a number of herbicide compounds in site preparation applications. A total of 12 treatments were applied with three replications on three sites in a randomized complete block design. Applications were completed in mid-July using a total spray volume of 15 gpa. Treatments included MAT-28 applied alone at …

Screening Cut-Stump Control Of Chinese Tallowtree, Sweetgum And Yaupon With Aminocyclopyrachlor, Jimmie L. Yeiser, M. Link, Jason Grogan

Faculty Publications

Aminocyclopyrachlor (MAT28) was investigated for the potential control of unwanted woody rootstocks of Chinese tallowtree (Triadica sebifera), sweetgum (Liquidambar styraciflua), and yaupon (Ilex vomitoria). A cutstump application of MAT28+Brush and Basal Oil by Helena was tested against standard treatments: (1) MAT28 2.5%, (2) MAT28 5%, (3) MAT28 10%, (4) MAT28 15%, (5) Garlon 4 Ultra 30%, (6) Garlon 4 Ultra+Stalker 20+1%, (7) MAT28+Stalker 10+1% and (8) untreated check. Herbicides were applied on February 4, 2009. Stems were severed with a chainsaw and herbicide applied immediately and sufficiently to thoroughly wet the surface, edges and top 2 inches of the stump. …

But Does It Work? The Impact Of Social Media Use On Interpretive Outcomes And Place Attachments At San Francisco Bay Area Parks, Eric Knackmuhs

Electronic Theses and Dissertations

Many parks are now using social media sites to connect with visitors but little is known about how effective these efforts have been. This study examined the influence of social media use on interpretive outcomes and place attachment. Visitors to four parks in the San Francisco Bay Area were surveyed twice, once as they exited the park (n = 529) and a second time via email (n = 216) six to ten weeks after visiting. In both surveys, respondents were asked how they use social media to experience parks and to what extent they experienced interpretive outcomes (intellectual and emotional …

Snapping A Pour Point For Watershed Delineation In Arcgis Hydrologic Analysis, Yanli Zhang, Matthew W. Mcbroom, Jason Grogan, I-Kuai Hung

Faculty Publications

No abstract provided.

Soil Erosion Modeling With The Modified Universal Soil Loss Equation, Yanli Zhang, Jason Grogan, I-Kuai Hung, Ramanathan Sugumaran

Faculty Publications

No abstract provided.

The Changing Roles Of Natural Resource Professionals: Providing Tools To Students To Teach The Public About Fire, Pat Stephens Williams, Brian Oswald, Karen Stafford, Justice Jones, David Kulhavy

Faculty Publications

The Arthur Temple College of Forestry and Agriculture (ATCOFA) at Stephen F. Austin State University is taking a proactive stance toward preparing forestry students to work closely with the public on fire planning in wildland-urban interface areas. ATCOFA's incorporation of the "Changing Roles" curriculum provides lessons on how natural resource managers' roles are (1) different than they used to be, and (2) ever-evolving. The undergraduate Forestry Field Station summer program at the University's Piney Woods Conservation Center now emphasizes the importance and challenges of working with the public. The program brings practicing professionals from the Texas Forest Service to describe …

Involving The Public In Restoring The Role Of Fire In The Longleaf Pine Ecosystem Of Upland Island Wilderness, Brian P. Oswald, Ike Mcwhorter, Penny Whisenant

Faculty Publications

The 13,250-acre Upland Island Wilderness (UIW) in Texas was established in 1984 and is managed by the United States Forest Service (USFS). Historically, portions of it consisted of open and diverse longleaf pine (Pinus palustris) ecosystems which depend on frequent, low-intensity surface fires. As in many other relatively small wilderness areas, the vegetation and fuel conditions in the UIW underwent extensive changes after wilderness designation. Lightning-caused wildfires were no longer allowed to burn with the frequency or intensity that characterized the natural fire regime. This has resulted in an increase of shade-tolerant trees and shrubs, heavy accumulations of …

Basic Concepts In Forest Valuation And Investment Analysis, Steven H. Bullard, Thomas J. Straka

eBooks

This book was originally intended to supplement lectures in forestry economics at the undergraduate level. It’s currently used for that purpose in ‘Forest Resource Economics’ courses at several universities. The book is also intended, however, to serve as a basic reference for foresters with experience in valuation and investment analysis concepts and methods. It has proven to be a valuable resource in forest valuation and investment analysis workshops for practicing foresters, landowners, and others interested in forestry investments.

Ideal for use in undergraduate and graduate forestry education programs, as well as in forest valuation workshops.

Basic Concepts In Forest Valuation And Investment Analysis: Edition 3.0, Steven H. Bullard, Thomas J. Straka

Faculty Publications

This book was originally intended to supplement lectures in forestry economics at the undergraduate level. It’s currently used for that purpose in ‘Forest Resource Economics’ courses at several universities. The book is also intended, however, to serve as a basic reference for foresters with experience in valuation and investment analysis concepts and methods. It has proven to be a valuable resource in forest valuation and investment analysis workshops for practicing foresters, landowners, and others interested in forestry investments.

Geolite, An Arcgis Extension To Assist In Lidar Data Processing, Yanli Zhang, Jason Grogan, I-Kuai Hung, Ramanathan Sugumaran

Faculty Publications

No abstract provided.

Soil Viewer Extension Brings Soil Data To Your Gis, Jason Grogan, I-Kuai Hung, Yanli Zhang

Faculty Publications

No abstract provided.

Collecting Multiple Point Features Referenced To A Single Geographic Position In Arcpad, Jason Grogan, I-Kuai Hung, Yanli Zhang

Faculty Publications

No abstract provided.

Forest Resources Institute, Arthur Temple College Of Forestry And Agriculture

eBooks

No abstract provided.

Use Of Carfentrazone For Control Of Natural Pine In Forestry Site Preparation Areas, Andrew W. Ezell, Jimmie L. Yeiser

Faculty Publications

Carfentrazone was applied in combination with imazapyr alone and three-way mixes with imazapyr and glyphosate to evaluate efficacy of natural pine control during site preparation activities. Results from four sites (two in MS, and one each in TX and SC) indicated that carfentrazone could assist in the control of small pine seedlings (less than six inches tall), but the control provided was not at a level considered acceptable for operational purposes. Larger pine seedlings (greater than one foot tall) were not adequately controlled by any of the treatments and shielding by other vegetation was an important factor in the control …

Split-Season Herbaceous Weed Control For Full-Season Seedling Performance, Jimmie L. Yeiser, Andrew W. Ezell

Faculty Publications

Results from four loblolly pine (Pinus taeda L.) sites, one in each of MS and TX in 2001 and again in 2002, are presented. Twelve herbicide treatments and an untreated check were tested. Herbicide treatments were applied early (mid- March), late (mid-May), both timings, or not at all to achieve, early- late-, full-season, or no weed control. When averaged across all four sites and compared to the early treatment, bare ground was less from April through July and April through November on late treated and untreated plots, respectively. Full-season weed control provided numerically more bare ground than other treatments. When …

Evaluating Forest Volume Estimation At Barksdale Air Force Base Using Lidar And Multispectral Imagery, Richard E. Brooks, Daniel Unger, Hans Michael Williams, I-Kuai Hung

Faculty Presentations

Hardwood and pine stand volume estimates compiled from past field plot samples were compared to Lidar volume estimates through the interpretation of Lidar assessed height, crown width and trees per acre to ascertain if Lidar derived volume estimates can be used in lieu of traditional volume measurements.

Assessing Ecological Functions Of Bottomland Hardwood Wetlands Using Remote Sensing And Geographic Information Systems, Rachel Mcnamee, Hans Michael Williams, Kenneth W. Farrish, I-Kuai Hung, Daniel Unger

Faculty Presentations

Bottomland hardwoods are one of the most rapidly diminishing wetland ecosystems due to agricultural clearing, development, and reservoir construction. As society has become more aware of the functions of wetlands, so has the importance in conservation of these valuable resources. The objective of this study was to compare the accuracy of Remote Sensing and GIS based functional assessment to the field based Hydrogeomorphic (HGM) approach. Remote sensing models were developed using a combination of soil maps, soil information, QuickBird ® multispectral satellite imagery, LiDAR derived Digital Elevation Model (DEM), and LiDAR derived Canopy Height Model. Results, although mixed, indicated that …

Winter Food Habits And Preferences Of Northern Bobwhites In East Texas, Donald R. Dietz, R. Montague Whiting Jr., Nancy E. Koerth

Faculty Publications

During late winter, 1994 and 1995, we investigated food habits and preferences of northern bobwhites (Colinus virginianus; hereafter, bobwhites) collected on forested lands in east Texas. Crops for bobwhites were collected from areas under 3 management regimes, namely intensively managed for bobwhites (QMA) (i.e., tree basal area reduced, annually burned, numerous multi-stage food plots, etc.), extensively managed for timber and wildlife (NBS) (i.e., burned every 3-5 years, scattered 2-stage food plots with corn feeders), and unmanaged for wildlife (i.e., burned every 5-7 years). With years pooled, partridge pea (Cassia fasciculata), Hercules club (Zanthoxylum clava-herculis), and pine (Pinus spp.) seeds, and …

Integration Of Modified Universal Soil Loss Equation (Musle) Into A Gis Framework To Assess Soil Erosion Risk, Yanli Zhang, J. Degroote, Calvin Wolter, Ramanathan Sugumaran

Faculty Publications

Soil erosion is an important economic and environmental concern throughout the world. In order to assess soil erosion risk and conserve water and soil resources, soil erosion modeling at the watershed scale is urgently needed. This study integrated the Modified Universal Soil Loss Equation (MUSLE) in a Geographic Information System (GIS) framework in the form of a tool called ArcMUSLE, an extension of ArcGIS® software, to assist soil and water conservation agencies in soil erosion risk assessment and prioritization of critical areas for soil erosion control practices. With widely available spatial data, this tool can be applied to determine curve …

Watershed Forest Management Information System (Wfmis), Yanli Zhang, P. K. Barten

Faculty Publications

Maintenance of a sustainable clean water supply is critical for our future. However, watershed degradation is a common phenomenon around the world that leads to poor water quality. In order to protect water resources, the Watershed Forest Management Information System (WFMIS), was developed as an extension of ArcGIS® and is described in this paper. There are three submodels to address nonpoint source pollution mitigation, road system management, and silvicultural operations, respectively. The Watershed Management Priority Indices (WMPI) is a zoning approach to prioritize critical areas for conservation and restoration management. It meets the critical need to spatially differentiate land cover …

Multitemporal Analysis Using Landsat Thematic Mapper (Tm) Bands For Forest Cover Classification In East Texas, Jason Grogan, I-Kuai Hung, James Kroll

Faculty Publications

Land cover maps have been produced using satellite imagery to monitor forest resources since the launch of Landsat 1. Research has shown that stacking leaf-on and leaf-off imagery (combining two separate images into one image for processing) may improve classification accuracy. It is assumed that the combination of data will aid in differentiation between forest types. In this study we explored potential benefits of using multidate imagery versus single-date imagery for operational forest cover classification as part of an annual remote sensing forest inventory system. Landsat Thematic Mapper (TM) imagery was used to classify land cover into four classes. Six …

Evaluating Forest Harvesting To Reduce Its Hydrologic Impact With A Spatial Decision Support System, Yanli Zhang, P. K. Barten, Ramanathan Sugumaran

Faculty Publications

Timber harvesting changes the condition of forest ecosystems, which are a major influence on the characteristics of headwater streams. Such characteristics include the quantity and timing of base flow and storm flow, concentrations of sediment and dissolved nutrients, water temperature, and the stability of the stream channels. This paper explores previous studies dealing with the relationship between timber harvesting and its hydrologic effects, especially long term water yield increase. The watershed disturbance threshold theory is raised and investigated in detail. The development and evaluation of a spatial decision support system, the Harvest Schedule Review System (HSRS), is then described. The …

Low Temperature Induces Two Growth-Arrested Stages And Change Of Secondary Metabolites In Bursaphelenchus Xylophilus, L. L. Zhao, W. Wei, David L. Kulhavy, Xing Yao Zhang, Jiang Hua Sun

Faculty Publications

The third-stage dispersal juvenile (JIII) is the stage for survival and dispersal in the winter of the pine wood nematode,

Bursaphelenchus xylophilus. Through investigations at different temperatures, we found two kinds of growth-arrested development, including the adult longevity extension and JIII formation induced by low temperature. They showed similar characters: densely packed lipid droplets and extended longevity. We considered that there were four stages in the formation of growth-arrested stages: induction, growth-arrested pathway, growth-arrested development and cold-tolerance duration. Moreover, at 4◦C there were significant changes in secondary metabolites, which may be related to signal communication and metabolism associated with …

Landscape Analysis Of George W. Pirtle Scout Reservation, David Kulhavy, Daniel Unger, Frank B. Shockley, Josh Bardwell

Faculty Presentations

To assist in detecting change over time for the forested landscape of George W. Pirtle Scout Reservation, Panola County, Texas, digital ortho-photography imagery (acquired 1996 and 2004) were used to designate forest cover types and hazard rating for forest insects and diseases. Status of camp grounds was ascertained and recommendations made for management using the GIS database created for the camp.

Correlation Between Pollen Dispersion And Forest Spatial Distribution Patterns In The Southeastern United States, I-Kuai Hung

Faculty Presentations

The pollen that falls to the surface at any given point is called the pollen rain. For most regions of the world the pollen rain provides a fairly reliable record of the plants that produce and disperse airborne pollen within a radius of about 30 km from the sampled location. To some extent the local pollen rain can also reflect limited information about the insect-pollinated plants living in a region. For some regions of North America, existing studies of the pollen rain and the regional vegetation associated with those data demonstrate a reliable relationship between these two vegetation aspects. For …

The Effect Of Carbon Revenues On The Rotation And Profitability Of Loblolly Pine Plantations In East Texas, Ching Hsun Huang, Gary D. Kronrad

Faculty Publications

This study determined the profitability and financially optimal thinning and final harvest rotation of loblolly pine (Pinus taeda) managed exclusively for timber production or for dual products of timber production and carbon sequestration. The results suggest that 1) depending on landowner’s alternative rate of return, the inclusion of carbon revenues in forest management may shorten or prolong the optimal timber-carbon rotation length, compared to the optimal rotation that maximizes timber value only; 2) the effect of carbon revenues on the optimal rotation length and the percentage gain in soil expectation value is larger on low-productivity sites than on high-productivity sites, …

Loblolly Pine Growth Response To Mid-Rotational Treatments In An Eastern Texas Plantation, Mohammad M. Bataineh, Amanda L. Bataineh, Brian P. Oswald, Kenneth W. Farrish, Hans Michael Williams

Faculty Publications

The effects of mid-rotational treatments (herbicide, prescribed burn, combination of herbicide and burn, and fertilization) on growth of loblolly pine were evaluated. Five replicates were established in a split-plot experimental design with fertilizer treatments as the whole-plot factor and competition control treatments as the sub-plot factor. Growth response was measured (as change in diameter, total height, and volume) at 8 months and again 4 years after treatments were applied. Mid-rotational treatments failed to enhance diameter, height, and volume growth of loblolly pine. However, a small positive response of diameter growth to fertilization was detected. Height growth was not significantly affected …