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Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
Black Bears On The Way Back, Christopher E. Comer
Black Bears On The Way Back, Christopher E. Comer
Faculty Publications
No abstract provided.
Red-Cockaded Woodpeckers And Hurricanes, Zoe Hoyle
Red-Cockaded Woodpeckers And Hurricanes, Zoe Hoyle
Faculty Publications
No abstract provided.
Use Of Trees By The Texas Ratsnake (Elaphe Obsoleta) In Eastern Texas, Josh B. Pierce, Robert R. Fleet, Lance Mcbrayer, D. Craig Rudolph
Use Of Trees By The Texas Ratsnake (Elaphe Obsoleta) In Eastern Texas, Josh B. Pierce, Robert R. Fleet, Lance Mcbrayer, D. Craig Rudolph
Faculty Publications
We present information on the use of trees by Elaphe obsoleta (Texas Ratsnake) in a mesic pine-hardwood forest in eastern Texas. Using radiotelemetry, seven snakes (3 females, 4 males) were relocated a total of 363 times from April 2004 to May 2005, resulting in 201 unique locations. Snakes selected trees containing cavities and used hardwoods and snags for a combined 95% of arboreal locations. Texas Ratsnake arboreal activity peaked during July and August, well after the peak of avian breeding activity, suggesting arboreal activity involves factors other than avian predation.
A New Diameter Distribution Model For Unmanaged Slash Pine Plantations In East Texas, Dean W. Coble, Young Jin Lee
A New Diameter Distribution Model For Unmanaged Slash Pine Plantations In East Texas, Dean W. Coble, Young Jin Lee
Faculty Publications
A parameter recovery procedure for the Weibull distribution function based on four percentile equations was used to develop a new diameter distribution yield prediction model for unmanaged slash pine (Pinus elliottii Engelm.) plantations in East Texas. This new model was similar in structure to the model of Lee and Coble (Lee, Y.J., and D.W. Coble. 2006. A new diameter distribution model for unmanaged loblolly pine plantations in east Texas. South. J. Appl. For. 30(1):13–20) in their work with East Texas loblolly pine plantations. The new model was compared with the diameter distribution model of Lenhart (Lenhart, J.D. 1988. Diameter distribution …
Standardized, Cost-Effective, And Repeatable Remote Sensing Methodology To Quantify Forested Resources In Texas, Daniel Unger, James Kroll, I-Kuai Hung, Jeffrey M. Williams, Dean W. Coble
Standardized, Cost-Effective, And Repeatable Remote Sensing Methodology To Quantify Forested Resources In Texas, Daniel Unger, James Kroll, I-Kuai Hung, Jeffrey M. Williams, Dean W. Coble
Faculty Publications
A standardized remote sensing methodology was evaluated for its use in quantifying the forested resources of the state of Texas in a timely and cost-effective manner. Landsat data from 2002 were used to create a land cover base map encompassing a four-county study area in East Texas. Site-specific and non-site-specific accuracy assessments of the classified map indicate that overall the 2002 base map accuracy of 72.78% was within acceptable remote sensing standards for Landsat data and that forest cover types derived from 2002, 1987, and 1980 Landsat data were within 4.4, 0.5, and 7.4% agreement with Forest Inventory and Analysis …
Juvenile-To-Adult Antler Development In White-Tailed Deer In South Texas, James Kroll, Ben Koerth
Juvenile-To-Adult Antler Development In White-Tailed Deer In South Texas, James Kroll, Ben Koerth
Faculty Publications
Past studies using penned deer provide conflicting results on the age when reliable predictions about antler growth potential in white-tailed deer (Odocoileus virginianus) can be made. We captured wild whitetail males via aerial net gun on 12 ranches in 5 counties in south Texas, USA, from 1999 to 2007 to determine if a reliable juvenile-to-adult relationship in antler development existed. We individually marked and released captured animals at the trap site after we took antler and body measurements. We recaptured marked animals as possible in subsequent years or until we obtained final measurements after legal harvest. Amount of growth in …
Estimating Bobcat Abundance In East Texas Using Infrared-Triggered Cameras, Matthew E. Symmank, Christopher E. Comer, James C. Kroll
Estimating Bobcat Abundance In East Texas Using Infrared-Triggered Cameras, Matthew E. Symmank, Christopher E. Comer, James C. Kroll
Faculty Publications
Reliable population estimation techniques for cryptic forest predators generally are lacking. Development of an efficient and reliable technique to estimate predator abundance directly would be a valuable tool for wildlife managers concerned with predator management. We evaluated the potential for camera survey techniques to provide abundance estimates for bobcats (Lynx rufus) in southeastern forest habitats. We also determined our ability to capture other forest carnivores photographically using these techniques. We used TrailMaster 1500 active infrared-triggered cameras to estimate abundance on a 1318-ha private land holding in eastern Texas. Camera stations were located along roads and wildlife travel corridors …
Growth And Condition Of American Alligators (Alligator Mississippiensis) In An Inland Wetland Of East Texas (Abstract), David T. Saalfeld, Warren C. Conway
Growth And Condition Of American Alligators (Alligator Mississippiensis) In An Inland Wetland Of East Texas (Abstract), David T. Saalfeld, Warren C. Conway
Faculty Publications
Since removal from the endangered species list, Alligator mississippi-ensis (American Alligator) populations have recovered to allow regulated harvest throughout most of their range. However, harvest/population management is com- plicated since alligators are long-lived, reach sexual maturity at a minimum size rather than age, and experience differential growth rates depending on geographic location, growing season length, local environmental conditions, habitat, and population density. To date, few data exist on age, sex, growth, and size structure of inland alligator populations. In this study, alligator growth rate and condition were quantified through an intensive mark-recapture study conducted at Angelina-Neches/Dam B Wildlife Management …
Survival Of Longleaf And Loblolly Pines Planted At Two Spacings In An East Texas Bahiagrass Silvopasture, Brian P. Oswald, Kenneth W. Farrish, Micah-John Beierle
Survival Of Longleaf And Loblolly Pines Planted At Two Spacings In An East Texas Bahiagrass Silvopasture, Brian P. Oswald, Kenneth W. Farrish, Micah-John Beierle
Faculty Publications
The practice of combining intensive timber and forage production on the same site, a silvopasture system, offers landowners the potential for diversification of income. The establishment of such a system in a pasture setting offers unique challenges compared with traditional timber or forage systems. In 2003, a silvopasture demonstration was established south of Carthage, Texas, in a pasture dominated by bahiagrass (Paspalum notatum). Four replications of treatments composed of open pasture, longleaf (Pinus palustris) and loblolly (Pinus taeda) pine planted at a traditional spacing, and longleaf and loblolly pine planted at a silvopasture spacing were established. Due to high mortality …
Watershed Forest Management Information System (Wfmis), Yanli Zhang, P. K. Barten
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
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 …
4th Lone Star Regional Native Plant Conference, David Creech, Greg Grant, James Kroll, Dawn Stover
4th Lone Star Regional Native Plant Conference, David Creech, Greg Grant, James Kroll, Dawn Stover
Lone Star Regional Native Plant Conference
No abstract provided.
Evaluating Forest Harvesting To Reduce Its Hydrologic Impact With A Spatial Decision Support System, Yanli Zhang, P. K. Barten, Ramanathan Sugumaran
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 …