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- Lidar (2)
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- Digital image processing (1)
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- Ducks; waterfowl densities (1)
- Elevated blinds (1)
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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Ghosts Of Nacogdoches Historical Trail, David Kulhavy, Michael Clanahan, Daniel Unger, Donald Brahman
Ghosts Of Nacogdoches Historical Trail, David Kulhavy, Michael Clanahan, Daniel Unger, Donald Brahman
Faculty Presentations
Welcome to the Ghosts of Nacogdoches Historic Trail. Open to all, this city trail is sponsored and maintained by the East Texas Area Council of the Boy Scouts of America. Throughout the United States of America the Boy Scouts encourage the hiking of National Historic Trails to increase the awareness of Boy Scouts towards the remarkable history of our country. The Ghosts of Nacogdoches Historic Trail is intended to focus narrowly on the importance of Nacogdoches as a hub of Western expansion and frontier development. An astute student will pick up the flavor of the Oldest Town in Texas and …
Assessing Impact Of Hurricane Rita On Habitat Red-Cockaded Woodpecker (Picoides Borealis) Clusters In Angelina National Forest, Texas, David Kulhavy, Jose Gonzales, Daniel Unger, I-Kuai Hung
Assessing Impact Of Hurricane Rita On Habitat Red-Cockaded Woodpecker (Picoides Borealis) Clusters In Angelina National Forest, Texas, David Kulhavy, Jose Gonzales, Daniel Unger, I-Kuai Hung
Faculty Presentations
Red-cockaded Woodpecker (RCW) habitat on the northern portion of the Angelina National Forest is composed primarily of loblolly and shortleaf pine with a significant hardwood component, especially in the midstory. Intensive management of RCW habitat in Angelina National Forest in Texas is a priority for this endangered species. The research inventoried downed timber in endangered red-cockaded woodpecker clusters on the Angelina National Forest in Texas following Hurricane Rita and utilized a geographic information system to analyze and display data to assess RCW habitat. In the Bannister Wildlife Management Unit of the Angelina National Forest, pine trees either uprooted or snapped …
Advanced Digital Image Processing Techniques For Natural Resource Assessment At Stephen F. Austin State University, Daniel Unger
Advanced Digital Image Processing Techniques For Natural Resource Assessment At Stephen F. Austin State University, Daniel Unger
Faculty Presentations
Graduate course work concentrating on land cover classification and digital image processing within the Arthur Temple College of Forestry and Agriculture at Stephen F. Austin State University is presented.
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
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
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 …
Soil And Plant Characteristics Compared Between Abandoned Natural Gas Drill Pads And Adjacent Areas, Barksdale Air Force Base, Louisiana, Adam J. Miller, Hans Michael Williams, Kenneth W. Farrish, Brian P. Oswald, Daniel Unger
Soil And Plant Characteristics Compared Between Abandoned Natural Gas Drill Pads And Adjacent Areas, Barksdale Air Force Base, Louisiana, Adam J. Miller, Hans Michael Williams, Kenneth W. Farrish, Brian P. Oswald, Daniel Unger
Faculty Presentations
Natural gas demand is projected to continue to rise. To meet this demand an increase in exploration and drilling will occur. This paper identifies some long term ecological impacts that remain following the plug and abandonment of the drill pads.
Estimating Waterfowl Densities In A Flooded Forest: A Comparison Of Methods, R. Montague Whiting Jr., J. Paul Cornes
Estimating Waterfowl Densities In A Flooded Forest: A Comparison Of Methods, R. Montague Whiting Jr., J. Paul Cornes
Faculty Presentations
During winter, aerial surveys are used to estimate densities of ducks that occupy open-water habitats. However, such surveys are ineffective for sampling forest-dwelling species, especially Aix sponsa (Wood Ducks), Anas platyrhynchos (Mallards), and Lophodytes cucullatus (Hooded Mergansers). We evaluated fixed-radius plot (FRP) and Reynolds and Goodrum variable-radius plot (VRP) methods for estimating waterfowl densities in a flooded hardwood bottomland. We constructed 15 elevated blinds on the Angelina River flood plain in eastern Texas and established a 1-ha FRP around each blind; color-coded markers were placed at fixed intervals from each blind. Observers surveyed waterfowl from blinds for 21 mornings during …