Life Sciences Commons^™

Bugs! Bugs! Bugs! Not Just For Children Anymore! Seeking A National Perspective, David L. Kulhavy

Faculty Publications

Insects as interpretive tools are an invaluable resource for the interpreter. There are many uses, from live insect displays to pinned specimens to the use of insects puppets in classrooms, conferences or other interpretive arenas. In this paper, the use of mealworms, the monarch butterfly as a candidate for our national insect, and the demonstration of insect locomotion are presented. The key to successful interpretation using insects is to encourage audience participation, exude enthusiasm, and promote the use of insects as an easy resource to acquire.

Effects Of Tidal Stage And Sun Angles On Intertidal Benthic Microalgal Productivity, James L. Pinckney, R. G. Zingmark

Faculty Publications

Motile benthic diatoms exhibit rhythmic vertical migrations that are influenced by tidal and light cycles. As a consequence of these periodic migrations, corresponding periodicities in benthic microalgal production should occur. Using oxygen microelectrodes, hourly measurements of microalgal production were obtained from subaerially exposed cores collected from low-intertidal muddy sediments in North Inlet estuary, South Carolina, USA Microalgal productivity at low tide was twice that at high tide (mean difference 52 %) and was significantly correlated with diurnal and tidal periodicities (r² = 0.41; p < 0.0001). Production values ranged from 28.0 to 460.5 µmol O₂ mg chl a^-1 h^-1 and maximum rates were achieved during mid-afternoon low …

Dynamics Of Bacterioplankton Abundance And Production In Seagrass Communities Of A Hypersaline Lagoon, Gerardo Chin-Leo, Ronald Benner

Faculty Publications

The significance of bacterioplankton in the flow of carbon and energy and in trophic dynamics of the upper Laguna Madre, Texas (USA), was estimated by measuring bacterioplankton abundance and production over an 18 mo period and over several diel cycles. Bacterioplankton production was estimated from incorporation rates of thymidine (DNA synthesis) and leucine (protein synthesis). These independent inhces of bacterial growth were generally in agreement and yielded nearly identical annual estimates of bacterial production (25.24 g C m^-2 yr^-1 based on thymidine and 25.12 g C m^-2 yr^-1based on leucine). Assuming a 30 % growth …

Osmophores, Floral Features, And Systematics Of Stanhopea (Orchidaceae), Kenneth J. Curry, Lorraine M. Mcdowell, Walter S. Judd, William Louis Stern

Faculty Publications

The floral fragrance glands (osmophores) of 18 species of Stanhopea and Sievekingia were examined through a series of developmental studies at light and electron microscope levels including late bud stages through postanthesis. Various characters were identified to be of potential systematic value and were recorded for each species. These characters included: texture of the osmophore surface, number of distinct cell layers comprising the osmophore, nature of lipid inclusions in osmophore cells, and presence or absence of plastoglobuli in osmophore amyloplasts. These characters were combined with traditional features of floral lip morphology for cladistic analysis. Sievekingia was the postulated outgroup. Stanhopea …

Recliner Sales Potential, Eric J. Todd, Steven H. Bullard

Faculty Publications

Over 19 percent of the 93 million households in the United States plan to purchase at least one recliner within the next 5 years. A recent survey of over 2,000 households also found that many expect to purchase more than one recliner, and combining the estimates yields a potential sales total of 22 million. This compares to an estimated total current ownership of 65 million recliners, and indicates clearly that nationwide the recliner market is very far from being "saturated" in the near future.

A Least Cost Analysis Of Transition In North America’S Upholstered, Wood Household Furniture Industry, Eric J. Todd, Steven H. Bullard

Faculty Publications

Factors influencing the location of the North American upholstered, wood household furniture industry are undergoing many changes. This paper presents a least cost linear programming approach to determining optimal furniture production and shipment patterns, The results suggest that Mexico and the 'East South Central region of the U.S. are well-poised to increase their shares of the North American market as consumption patterns and factors of production change in the next decade.

Age: The Most Important Factor In Upholstered Furniture Buying Plans, Steven H. Bullard

Faculty Publications

Age is highly related to income. lifestyle and other critical factors in consumer behavior. In a recent survey of over 2.000 U.S. households. age proved to be the most important determinant of up· holstered furniture purchasing plans. Consumers less than 45 years old. for example. are more than three times more likely to plan purchases of upholstered household furniture than those 65 and older.

Is Wood Good?, Steven H. Bullard

Faculty Publications

I n U.S. households there is currently a very strong belief that "wood is good" in upholstered furniture. In a recent surve)' of the upholstered furniture buying plans of over 2.000 U.S. households:

• 88.4 percent of the respondents said the material used in frame construction was important, and ...

• 85.4 percent said they preferred wood over metals. Fiberglas or other frame materials.

Silviculture And The Red-Cockaded Woodpecker: Where Do We Go From Here?, David Kulhavy, W. G. Ross, Richard N. Conner, James H. Mitchell, Gloria Maples Chrismer

Faculty Publications

Recent standards and guidelines for the protection and management of red-cockaded woodpecker habitat within 3/4 mi of colony sites, and also thinning within colonies to reduce basal area and midstory will have a significant effect on National Forest lands. The relation of these thinnings to forest pest management will be examined as well as the area of forest involved. Current fire regulations in relation to prescribed burns and potential fuel buildup will be examined. Plans for research, including disturbances, hazard, and risk rating for southern pine beetle and landscape changes will be presented.

Land And Resource Management On Typic Quartzipsamments, David Kulhavy, W. D. Tracey, W. G. Ross

Faculty Publications

Survival and growth of seven species/treatment combinations were tested on Tonkawa fine sand (thermic, coated Typic Quartzipsamment) in Nacogdoches County, Texas. In January 1983, seedlings were hand-planted on an intensively prepared clearcut site on the Tonkawa soil series in northern Nacogdoches County. Tonkawa sands serve as recharge zones for the Carrizo aquifer, a major source of clean groundwater for much of East Texas. Intensive management practices on this sensitive site created severe site conditions, providing incentive for the study. Species/ treatment combinations were: untreated loblolly (Pinus taeda L.) pine (LOB/CON); Terra-SorbTM -treated loblolly (LOB/Tm);olin clay slurry-treated loblolly (LOB/CLA); untreated slash …

Soil Properties Relating To Height Growth Of Loblolly Pine On Four Major Soil Series In East Texas, R. Larry Willett, M. Victor Bilan

Faculty Publications

Stem analysis was used to obtain age and height data for loblolly pine (Pinus taeda L.) stands growing on Bowie, Fuquay, Sacul, and TroupxlsTnortheastern Texas. The soil profiles were described and bulk soil samples were taken in each sample stand. Selected physical and chemical soil properties were measured for each soil horizon. Stepwise regression analysis was used to correlate average stand height at ages 5, 10, 20, and 30 years with soil properties. Strong associations were found between stand height and properties which relate to available soil moisture holding capacity, soil permeability, and soil aeration. For Bowie, Fww , and …

Physiology Of Red-Cockaded Woodpecker Cavity Trees: Implications For Management, William G. Ross, David Kulhavy, Richard N. Conner, Jianghua Sun

Faculty Publications

Resin flow and tree moisture stress, frequently used as indicators of pine susceptibility to pine bark beetle (Dendroctonus frontalis Zimm.) attack, were measured in loblolly (Pinus taeda L.) and shortleaf (P. echinata Mill.) pines red-cockaded woodpecker [Picoides boreal& (Vieillot)] cavity trees in the Angelina and Davy Crockett National Forests in eastern Texas. No differences in moisture stress were found, whereas resin flow between different types of cavity trees and control or potential trees varied by site and species. It was concluded that effects of red-cockaded woodpecker activity on host tree susceptibility to southern pine beetle will vary by site, tree …

Susceptibility Of Red-Cockaded Woodpecker Colony Areas To Southern Pine Beetle Infestation In East Texas, James H. Mitchell, David L. Kulhavy

Faculty Publications

Seven red-cockaded woodpecker (Picoides borealis) colonies and stands within a one-quarter mile radius were hazard-rated for susceptibility to the southern pine beetle (Dendroctonus Frontalis Zimm.). Individual colonies generally were ranked low to moderate hazard using the Texas Hazard system and moderate hazard using the National Forest Risk system. Within one quarter mile of the colonies, 28% of the stands were low hazard, 25% moderate, 0.3% high and 7.5% extreme with Texas Hazard. Four percent were low hazard, 52% moderate, and 6% high with National Forest Risk. Moderate to extreme hazard stands within one-quarter mile of the …

Fusiform Rust Incidence In Loblolly And Slash Pine Plantations In East Texas, T.G. Gregoire, J. David Lenhart, A Arabatzis

Faculty Publications

A method to predict the incidence of fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp.

fusiforme) in unthinned loblolly (Pinus taeda L.) and slash pine (Pinus elliotti Englem.) plantations located on non-oldfields in East Texas is presented. In addition, procedures are described to estimate changes in rust incidence over time as: 1. A rust-free tree remains rust free, develops stem or branch galls, or dies. 2. A tree with branch galls remains with branch galls only, develops stem galls, or dies. 3. A tree with stem galls remains with stem galls, or dies. Multinomial logistic regression models utilizing …

Site Index Curves For Loblolly And Slash Pine Plantations In The Post Oak Belt Of East Texas, W. D. Hacker, M. Victor Bilan

Faculty Publications

Stem analysis data collected from dominant and codominant trees growing in loblolly (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) plantations were used to develop site index curves. These data were collected from loblolly and slash pine plantations growing in the Post Oak Belt of East Texas. The height prediction curves were based on the Chapman-Richards function and will provide an indication of site productivity based on plantation age. South. J. Appl. For. 15(2):97-100.

Causes Of Mortality Of Red-Cockaded Woodpecker Cavity Trees, Richard N. Conner, D. Craig Rudolph, David Kulhavy, Ann Snow

Faculty Publications

Over a 13-year period we examined the mortality of cavity trees (n = 453) used by red-cockaded woodpeckers (Picoides borealis) on national forests in eastern Texas. Bark beetles (53%), wind snap (30%), and fire (7%) were the major causes of cavity tree mortality. Bark beetles were the major cause of mortality in loblolly (Pinus taeda) and shortleaf (P. echinata) pines, whereas fire was the major cause in longleaf pines (P. palustris). Cavity trees on the Angelina National Forest (NF) were dying at a higher rate than new, complete cavities were being excavated. Cavity enlargement by pileated woodpeckers (Dryocopus pileatus) on …

Relative Performance Of Hardwood Sawing Machines, P. H. Steele, M. W. Wade, Steven H. Bullard, P. Araman

Faculty Publications

Only limited information has been available to hardwood sawmiller on the performance of their sawing machines. This study analyzes a large database of individual machine studies to provide detailed information on 6 machine types. These machine types were band headrig, circular headrig, band linebar resaw, vertical band splitter resaw, single arbor gang resaw and double arbor gang resaw. Kerf width and within-board, between-board and total sawing variation values are given with an analysis of their origin in individual machine characteristics. Feedworks and setworks type and sawblade thickness and type generally determined machine type performance.

Optimal Width And Depth For Maximum Breaking Load Of Wood Beams, Steven H. Bullard, Vikram Yadama

Faculty Publications

The strength of solid wood beams is an important property to consider in construction. Such beams do not receive further primary processing after leaving the sawmill, and their quality and strength properties are therefore determined by their initial, primary breakdown at the sawmill. The most efficient means of controlling the quality of solid wood beams is thus at the sawmill level. This paper presents a method of determining the width and depth of solid beams that will maximize breaking load.

Upholstered Potential In The U.S. And Canada, Gary M. Kellum, Eric J. Todd, Steven H. Bullard

Faculty Publications

The potential market for upholstered furniture sales in the near future appears to be quite favorable in both the United States and Canada. A recent survey indicates that 48 percent of U.S. house· holds,and 54 percent of Canadian households are planning to purchase some type of upholstered furniture in the next 4 to 5 years.

Upholstered Household Furniture In The United States: A Survey Of Current Ownership And Purchasing Plans, Steven H. Bullard, Max L. Doolittle

Faculty Publications

This report presents highlights of the results of a telephone survey of U.S. households concerning their ownership, purchasing plans, and preferences regarding upholstered household furniture. The survey was conducted in October and November 1989, by the Survey Research Unit of the Social Science Research Center of the Mississippi Agricultural and Forestry Experiment Station. The SUl'Vey also included Canadian households, and subsequent reports will present results for Canada as well as statistical analyses of specific results for both countries. The sUl'vey was intended to help identify market potential for various items of upholstered household furniture, and the results are therefore not …

The Upholstered, Wood Household Furniture Industry In North America: A Spatial Equilibrium Analysis, Eric J. Todd, Steven H. Bullard

Faculty Publications

Upholstered, wood household furniture production has become an increasingly important part of total furniture production in the United States. From 1982 to 1987, employment in the upholstered furniture industry grew 16 percent, and in 1987, the industry's 82,100 employees represented about 30 percent of U.S. household furniture indush-y employment (USDC Bureau of the Census 1990). Over the same 5-year period, value added for the upholstered furniture industry increased by 52 percent to more than $2.6 billion.

Fungal Development And Host Cell Responses To The Rust Fungus Puccinia Substriata Var. Indica In Seedling And Mature Leaves Of Susceptible And Resistant Pearl Millet [Abstract], Josephine Taylor, C. W. Mims

Faculty Publications

No abstract provided.