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- Biomes (2)
- Forest management (2)
- Pinus taeda (2)
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- Remote sensing (2)
- Spatial analysis (2)
- Splines (2)
- Zonal statistics (2)
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- Coconino National Forest (1)
- Colinus virginianus (1)
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- East Texas Pine Plantation Research Project (1)
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- Exotic earthworms (1)
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- Food habits (1)
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Articles 1 - 21 of 21
Full-Text Articles in Life Sciences
Changes In Understory Vegetation Of A Ponderosa Pine Forest In Northern Arizona 30 Years After A Wildfire, Amanda L. Bataineh, Brian P. Oswald, Mohammad M. Bataineh, Hans M. Williams, Dean W. Coble
Changes In Understory Vegetation Of A Ponderosa Pine Forest In Northern Arizona 30 Years After A Wildfire, Amanda L. Bataineh, Brian P. Oswald, Mohammad M. Bataineh, Hans M. Williams, Dean W. Coble
Faculty Publications
Wildland fires can cause shifts in understory species composition and production. Many studies have examined short-term changes in understory vegetation following a wildfire; however, very few long term studies are available. The objective of this study was to examine changes in understory (herb and shrub) species composition and production since the 1972 Rattle Burn wildfire on the Coconino National Forest near Flagstaff, Arizona. Understory species composition and production were originally sampled in 1972, 1974, and 1980 and were re-sampled during July and August of 2002 and 2003 on 30 plots in each of four sites: high severity burn, low severity …
Accuracy Assessment Of Land Cover Maps Derived From Multiple Data Sources, Daniel Unger, Hillary Tribby, Hans Michael Williams, I-Kuai Hung
Accuracy Assessment Of Land Cover Maps Derived From Multiple Data Sources, Daniel Unger, Hillary Tribby, Hans Michael Williams, I-Kuai Hung
Faculty Publications
Maximum Likelihood (ML) and Artificial Neural Network (ANN) supervised classification methods were used to demarcate land cover types within IKONOS and Landsat ETM+ imagery. Three additional data sources were integrated into the classification process: Canopy Height Model (CHM), Digital Terrain Model (DTM) and Thermal data. Both the CHM and DTM were derived from multiple return small footprint LIDAR. Forty maps were created and assessed for overall map accuracy, user's accuracy, producer's accuracy, kappa statistic and Z statistic using classification schemes from U.S.G.S. 1976 levels 1 and 2 and T.G.l.C. 1999 levels 2 and 4. Results for overall accuracy of land …
Compatible Cubic-Foot Stem Volume And Upper-Stem Diameter Equations For Semi-Intensive Plantation Grown Loblolly Pine Trees In East Texas, Dean W. Coble, Keith Hilpp
Compatible Cubic-Foot Stem Volume And Upper-Stem Diameter Equations For Semi-Intensive Plantation Grown Loblolly Pine Trees In East Texas, Dean W. Coble, Keith Hilpp
Faculty Publications
The Max-Burkhart taper equation was used to develop compatible taper and volume equations for semi-intensive plantation grown loblolly pine (Pinus taeda L.) trees in East Texas. Semi-intensive plantations in East Texas are characterized by some form of mechanical site preparation, a burn, possibly chemical weed control, improved seedlings if planted after 1985, and, possibly, a midrotation thinning and/or fertilization. The equations in this study were compared with those of Lenhart et al. [Lenhart, J.D., T.L. Hackett, C.J. Laman, T.J. Wiswell, and J.A. Blackard. 1987. Tree content and taper functions for loblolly and slash pine trees planted on non-old field in …
The Effect Of Carbon Revenues On The Rotation And Profitability Of Loblolly Pine Plantations In East Texas, Ching Hsun Huang, Gary D. Kronrad
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, …
A New Diameter Distribution Model For Unmanaged Loblolly Pine Plantations In East Texas, Young Jin Lee, Dean W. Coble
A New Diameter Distribution Model For Unmanaged Loblolly Pine Plantations In East Texas, Young Jin Lee, Dean W. Coble
Faculty Publications
A parameter recovery procedure for the Weibull distribution function based on four percentile equations was used to develop a diameter distribution yield prediction model for unmanaged loblolly pine (Pinus taeda L.) plantations in East Texas. This model was compared with the diameter distribution models of Lenhart and Knowe, which have been used in East Texas. All three models were evaluated with independent observed data. The model developed in this study performed better than the other two models in prediction of trees per acre and cubic-foot volume per acre (wood and bark, excluding stump) across diameter classes. Lenhart’s model consistently underestimated …
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
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 …
Tip Moth Control And Loblolly Pine Growth In Intensive Pine Culture: Four Year Results, David Kulhavy, Jimmie L. Yeiser, L. Allen Smith
Tip Moth Control And Loblolly Pine Growth In Intensive Pine Culture: Four Year Results, David Kulhavy, Jimmie L. Yeiser, L. Allen Smith
Faculty Publications
Twenty-two treatments replicated four times were applied to planted loblolly pine, Pinus taeda L., on bedded industrial forest land in east Texas for measurement of growth impact of Nantucket pine tip moth (NPTM), Rhyacionia frustrana Comstock, and effects on pine growth over 2 years. Treatments were combinations of Velpar®, Oust®, Escort®, and Arsenal® herbicides; and diammonium phosphate (DAP) fertilizer with treatments in 2000, in 2001, or in both years. Ten of the treatments were treated with Mimic timed with pheromone traps to reduce NPTM infestations. NPTM was controlled with the Mimic, and there was a small but significant increase in …
Use Of A Generalized Sigmoid Growth Function To Predict Site Index For Unmanaged Loblolly And Slash Pine Plantations In East Texas, Dean W. Coble, Young-Jin Lee
Use Of A Generalized Sigmoid Growth Function To Predict Site Index For Unmanaged Loblolly And Slash Pine Plantations In East Texas, Dean W. Coble, Young-Jin Lee
Faculty Publications
A generalized sigmoid growth function was used in this study to model site index (SI) for unmanaged or lowintensity managed loblolly pine (Pinus taeda, L.) and slash pine (Pinus elliottii, Engelm.) plantations in east Texas. Schnute's growth function was fit to 11 ,367 and 5,040 height-age observations of loblolly and slash pine, respectively. These data were collected over a 20-year period from unmanaged pine plantations located across the east Texas region as a part of the East Texas Pine Plantation Research Project (ETPPRP). The fit model was used to derive Sl equations (25-year index age). The Sl equations apply to …
Effects Of Flooding Regime, Mycorrhizal Inoculation And Seddling Treatment Type On First-Year Survival Of Nuttall Oak (Quercus Nuttallii Palmer), Hans Michael Williams, Virginia Burkett
Effects Of Flooding Regime, Mycorrhizal Inoculation And Seddling Treatment Type On First-Year Survival Of Nuttall Oak (Quercus Nuttallii Palmer), Hans Michael Williams, Virginia Burkett
Faculty Publications
Three different types of Nuttall oak ( Quercus nuttallii Palmer) seedlings were planted on floodprone, former cropland in Mississippi, Louisiana, and Texas. The three types of 1+0 seedlings planted at each site in January and February of 1995 were bareroot seedlings, seedlings grown in 164 square centimeters plastic containers, and containergrown seedlings inoculated with vegetative mycelia of Pisolithus tinctorious (Pers.) Coker and Couch. Seedlings at the Mississippi site were planted in a split-plot design at three different elevations, which provided three different natural flooding treatments. Seedlings at the other two sites were planted in a Latin square design at a …
Effects Of Sower Type And Seedbed Density On Bareroot Seedling Morphology And Early Field Performance Of An East Texas Family Of Loblolly Pine, Hans Michael Williams, Tim Stewart
Effects Of Sower Type And Seedbed Density On Bareroot Seedling Morphology And Early Field Performance Of An East Texas Family Of Loblolly Pine, Hans Michael Williams, Tim Stewart
Faculty Publications
Precision sowing is commonly used at forest tree nurseries in order to improve the growing space uniformity of seedlings in the beds. Temple-Inland Forest Products Corporation recently purchased a vacuum sower and requested a study be conducted comparing their new sower with a drill sower on the morphological characteristics of loblolly pine (Pinus taeda L.) at lifting. The study was conducted in 2000 and repeated in 2001. The seed were sown using the two sower types to achieve four densities of 161 , 215, 269, and 323 seedlings/m2• Two half-sibling families were tested in 2000, and one halfsibling family was …
Genetic Variation Among Gravid Female American Woodcock In Eastern Texas During Winter (Abstract), R. Montaque Whiting Jr., Christopher E. Comer
Genetic Variation Among Gravid Female American Woodcock In Eastern Texas During Winter (Abstract), R. Montaque Whiting Jr., Christopher E. Comer
Faculty Publications
No abstract provided.
Spatial Autocorrelation And Pseudoreplication In Fire Ecology, Amanda L. Bataineh, Brian P. Oswald, Mohammad M. Bataineh, Daniel Unger, I-Kuai Hung, Daniel Scognamillo
Spatial Autocorrelation And Pseudoreplication In Fire Ecology, Amanda L. Bataineh, Brian P. Oswald, Mohammad M. Bataineh, Daniel Unger, I-Kuai Hung, Daniel Scognamillo
Faculty Publications
Fire ecologists face many challenges regarding the statistical analyses of their studies. Hurlbert (1984) brought the problem of pseudoreplication to the scientific community’s attention in the mid 1980’s. Now, there is a new issue in the form of spatial autocorrelation. Spatial autocorrelation, if present, violates the traditional statistical assumption of observational independence. What, if anything, can the fire ecology community do about this new problem? An understanding of spatial autocorrelation, and knowledge of available methods used to reduce the effect of spatial autocorrelation and pseudoreplication will greatly assist fire ecology researchers.
Population Trends Of Red-Cockaded Woodpeckers In Texas, Richard N. Conner, Daniel Saenz, D. Craig Rudolph
Population Trends Of Red-Cockaded Woodpeckers In Texas, Richard N. Conner, Daniel Saenz, D. Craig Rudolph
Faculty Publications
We tracked population trends of Red-cockaded Woodpeckers (Picoides borealis) in eastern Texas from 1983 through 2004. After declining precipitously during the 1980s, woodpecker population trends on federal lands (National Forests and Grasslands in Texas, but excluding the Big Thicket National Preserve) increased between 1990 and 2000, and have been stable to slightly decreasing over the past four years. Litigation against the U.S. Forest Service in the mid 1980s reversed a severe population decline, whereas litigation during the past 8 years hampered recovery efforts for the Red-cockaded Woodpecker. Red-cockaded Woodpecker populations on private and State of Texas lands have steadily declined …
The Effects Of Sower And Bed Density On Bareroot Loblolly Pine Seedling Morphology And Early Height Growth, Hans M. Williams, Tim Stewart
The Effects Of Sower And Bed Density On Bareroot Loblolly Pine Seedling Morphology And Early Height Growth, Hans M. Williams, Tim Stewart
Faculty Publications
Precision sowing is commonly used at forest tree nurseries in order to improve the growing space uniformity of seedlings in the beds. Temple-Inland Forest Products Corporation recently purchased a vacuum sower and requested a study be conducted comparing their new sower with a drill sower on the morphological characteristics of loblolly pine (Pinus taeda L.) at lifting. The study was conducted in 2000 and repeated in 2001. The seed were sown using the two sower types to achieve four densities of 161, 215, 269, and 323 seedlings/m2. Two half-sibling families were tested in 2000, and one halfsibling family was …
Invasion Of Exotic Earthworms Into Ecosystems Inhabited By Native Earthworms, P. F. Hendrix, G. H. Baker, M. A. Callaham Jr., G. A. Damoff, C. Fragoso, G. Gonzalez, S. W. James, S. L. Lachnicht, T. Winsome, X. Zou
Invasion Of Exotic Earthworms Into Ecosystems Inhabited By Native Earthworms, P. F. Hendrix, G. H. Baker, M. A. Callaham Jr., G. A. Damoff, C. Fragoso, G. Gonzalez, S. W. James, S. L. Lachnicht, T. Winsome, X. Zou
Faculty Publications
The most conspicuous biological invasions in terrestrial ecosystems have been by exotic plants, insects and vertebrates. Invasions by exotic earthworms, although not as well studied, may be increasing with global commerce in agriculture, waste management and bioremediation. A number of cases has documented where invasive earthworms have caused significant changes in soil profiles, nutrient and organic matter dynamics, other soil organisms or plant communities. Most of these cases are in areas that have been disturbed (e.g., agricultural systems) or were previously devoid of earthworms (e.g., north of Pleistocene glacial margins). It is not clear that such effects are common in …
Winter Food Habits And Preferences Of Northern Bobwhites In East Texas, Donald R. Dietz, R. Montague Whiting Jr., Nancy E. Koerth
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 …
Geospatial Analysis Of Southern Pine Biome And Pollen Distribution Patterns In Southeastern, I-Kuai Hung
Geospatial Analysis Of Southern Pine Biome And Pollen Distribution Patterns In Southeastern, I-Kuai Hung
Faculty Publications
The spatial relationship between the parent plants and the distribution of their pollen rain is extremely important for the survival and health of natural ecosystems. In our modern societies there is a continuous and extensive need for wood products, therefore, the health and productivity of the forest ecosystems should be primary concerns for practitioners and researchers. Southern yellow pine forested biomes consist of four major pine species that have been extremely important as American timber sources and as income for the lumber industry. Currently, the intensive harvesting and exploitation of southern pine forests have created a series of highly fragmented …
Correlation Between Pollen Dispersion And Forest Spatial Distribution Patterns In The Southeastern United States, I-Kuai Hung
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 …
Accuracy Assessment Of Classified Maps Derived From High And Midspatial Resolution Multispectral Data, Daniel Unger, Sean O'Melveny
Accuracy Assessment Of Classified Maps Derived From High And Midspatial Resolution Multispectral Data, Daniel Unger, Sean O'Melveny
Faculty Presentations
No abstract provided.
Comparing The Accuracy Of Multi-Source Data Integration For Two Supervised Image Classification Methods: Maximum Likelihood And Artificial Neural Network, Hillary Tribby, Daniel Unger
Comparing The Accuracy Of Multi-Source Data Integration For Two Supervised Image Classification Methods: Maximum Likelihood And Artificial Neural Network, Hillary Tribby, Daniel Unger
Faculty Presentations
No abstract provided.
Food For Early Succession Birds: Relationships Among Arthropods, Shrub Vegetation, And Soil, Richard N. Conner, Daniel Saenz, Brent Burt
Food For Early Succession Birds: Relationships Among Arthropods, Shrub Vegetation, And Soil, Richard N. Conner, Daniel Saenz, Brent Burt
Faculty Publications
During spring and early summer, shrub- and herbaceous-level vegetation provides nesting and foraging habitat for many shrub-habitat birds. We examined relationships among arthropod biomass and abundance, foliage leaf surface area and weight, vegetation ground cover, soil characteristics, relative humidity, and temperature to evaluate what factors may influence arthropod food resources for birds. Relative humidity was inversely associated with arthropod biomass; as humidity increased biomass decreased (r = -0.44, P = 0.004). We failed to detect any relationships between deciduous foliage (surface area and weight) and arthropod biomass or abundance. However, both arthropod abundance (r = 0.30, P = 0.06) and …