An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
... In this study, we investigated oysters, Crassostrea virginica, from Laguna Madre in South Texas, where a 45-yr old study recorded metacercarial infections of the echinostomatid trematode, Acanthoparyphium spinulosum, an Asian relative of which, Acanthoparyphium tyosenense, has been associated with human infections via the ingestion of raw mollusks. In an effort to examine the base-line infection p ...
... BACKGROUND: Millions of people and domestic animals around the world are affected by leishmaniasis, a disease caused by various species of flagellated protozoans in the genus Leishmania that are transmitted by several sand fly species. Insecticides are widely used for sand fly population control to try to reduce or interrupt Leishmania transmission. Zoonotic cutaneous leishmaniasis caused by L. ma ...
acetaldehyde; adults; air; air quality; asthma; atmospheric chemistry; bronchitis; climatic zones; formaldehyde; human behavior; people; relative humidity; toxicity; urbanization; wind speed; California; New Jersey; Texas
Abstract:
... In-vehicle air quality (IVAQ) can be a major health concern due to factors such as urban sprawl and increased commuting time spent by individuals in vehicles. Few studies, particularly in the U.S., have considered in-vehicle toxic air contaminants, and none to date collected/analyzed field data in multiple communities across multiple climate zones. This study presents analyses of field data collec ...
... Native species of juniper are encroaching on grasslands throughout the Great Plains. Prescribed fire is often used to treat or prevent the early stages of encroachment, but little information is available about the contribution of small junipers to overall fuel loads. I sampled 33 individuals of Ashe juniper (Juniperus ashei) from grasslands on Fort Hood Military Reservation, Texas. The relationsh ...
... The geomorphological impact of an extreme storm on a barrier island tends to be modeled using a single cross-shore transect and dependent only on the elevation of the storm surge relative to the height of the dune. The foredune line, however, is rarely uniform and can exhibit considerable variation in height and width alongshore at a range of length scales. The purpose of this modeling study is to ...
... BACKGROUND: The apicomplexan hemoprotozoan parasite Theileria equi is one of the etiologic agents causing equine piroplasmosis, a disease of equines that is endemic throughout large parts of the world. Before 2009 the United States had been considered to be free of this parasite. Occasional cases had occurred but there was no evidence for endemic vector-borne transmission in the U.S. until a 2009 ...
... Xyleborinus artestriatus (Eichhoff 1878), an ambrosia beetle native to Asia, is reported for the first time in North America based on specimens from Georgia and Texas. This is the twenty-fourth species of exotic Xyleborini documented in North America. North American distributional records, key identification characteristics, morphological variability, and a brief history of the systematics are pre ...
... Presence of insect pests was assessed at eight pecan, Carya illinoensis (Wang.) Koch, storage facilities in Oklahoma (six) and Texas (two). Two types of insect traps were used within each facility. Floor-situated STORGARD® Beetle Dome™ traps were baited with a combination of pheromone and oil to monitor beetle pests of stored products, and hanging Pherocon 1C™ moth sticky traps were used to monito ...
body mass index; breakfast; children; diabetes; diet recall; energy intake; experimental design; linear models; longitudinal studies; nationalities and ethnic groups; nutrients; ready-to-eat foods; statistical analysis; Texas
Abstract:
... The consumption of non-ready-to-eat cereal and ready-to-eat cereal (RTEC) breakfasts have been associated with increased nutrient intakes and lower body mass index (BMI). These relationships have not been examined in low-income minority children.To evaluate, in low-income minority children, whether there is a relationship among the frequency of RTEC consumption and nutrient intakes measured at bas ...
Tyrannus; canopy; coasts; computer software; cropland; foraging; forests; geographic information systems; grasslands; habitat preferences; hay; insectivores; land cover; pastures; rural roads; shrublands; shrubs; statistical analysis; surveys; tropics; Gulf of Mexico; Midwestern United States; Texas
Abstract:
... Scissor-tailed Flycatchers (Tyrannus forficatus) are insectivorous Neotropical migrants that breed in the south-central United States. We examined their fine-scale (circles 300 m in radius centered on observed flycatcher locations) associations with different land cover types in south-central Texas. Scissor-tailed Flycatchers use a sit-and-scan foraging strategy; therefore, we expected the species ...
Jennifer E. Zora; Stefanie Ebelt Sarnat; Amit U. Raysoni; Brent A. Johnson; Wen-Whai Li; Roby Greenwald; Fernando Holguin; Thomas H. Stock; Jeremy A. Sarnat
... Exposure to traffic-related pollutants poses a serious health threat to residents of major urban centers around the world. In El Paso, Texas, this problem is exacerbated by the region's arid weather, frequent temperature inversions, heavy border traffic, and an aged, poorly maintained vehicle fleet. The impact of exposure to traffic pollution, particularly on children with asthma, is poorly unders ...
buildings; decision support systems; environmental management; land use; planning; remote sensing; transportation; Texas
Abstract:
... Urban land-use information plays a key role in a wide variety of planning and environmental management processes. The purpose of this study was to develop an automatic method for classifying detailed urban land-use classes with remote-sensing data. Seven land-use parcel attributes, derived from relevant remote-sensing data, were incorporated for classifying four land-use classes, namely office, in ...
... Basic natural history information is lacking for many bats, especially for bats of the Texas Panhandle. We examined community composition, relative abundance, and seasonal activity of bats in Palo Duro Canyon State Park, Texas, using 3 survey methods (mist net, roost surveys, and acoustic monitoring) between July 2006 and May 2009. Twelve species of bats were captured or observed, with the Brazili ...
... Numerous human activities constitute threats to biodiversity. The effects of climate change, including increasing drought in already arid lands, pose an additional layer of uncertainty in the fate of rare species. In the case of plants, reintroduction is becoming an important active management practice in species conservation. We hypothesized that even under extreme drought inoculation with mycorr ...
... We describe and illustrate the biogeography of the cicadas inhabiting continental North America, north of Mexico. Species distributions were determined through our collecting efforts as well as label data from more than 110 institutional collections. The status of subspecies is discussed with respect to their distributions. As we have shown over limited geographic areas, the distribution of indivi ...
... The blackmargined aphid, Monellia caryella (Fitch), was studied on three cultivars, ‘Cheyenne’, ‘Kiowa’, and ‘Pawnee’, of pecan, Carya illinoinensis (Wangenh.) K. Koch, in the field. Abundance of aphids and natural enemies (lacewings, ladybird beetles, and spiders) was determined twice weekly by directly inspecting foliage on each pecan variety during the summers of 2005 and 2006. Water-sensitive ...
... Habitat fragmentation is particularly severe in the Lower Rio Grande Valley (LRGV) of Texas, where greater than 90% of the native wetland habitat has been replaced by agriculture and urban development. The Brownsville Common Yellowthroat (Geothlypis trichas insperata), a rare subspecies of the Common Yellowthroat restricted to this area, is a good model for studying the effects of this extensive f ...
... Analysis of calcareous nannofossils, total organic carbon(TOC) values, and carbon isotope records from outcrop and drill cores in the central (Colorado and Kansas) and southern (Texas) Western Interior Basin (WIB) indicates predominantly oligotrophic surface water conditions during the late Cenomanian–Turonian Oceanic Anoxic Event 2(OAE2). High-resolution bio-chemostratigraphy of this interval all ...
... We report on a stable isotopic analysis of 17 hunter–gatherer burials from the Coleman site (41BX568), a Late Prehistoric Toyah Interval (700–350 years BP) occupation in Texas. Prior to our analysis, isotopic research on Toyah populations in Central Texas was represented by a single burial at site 41BX677. That burial showed an isotopic pattern suggestive of a diet heavily focused on CAM/C4 plants ...
... Since nutrient composition of pork has changed over the past two decades, a collaborative study was conducted by scientists at the US Department of Agriculture (USDA), Texas Tech University and the National Pork Board to determine current nutrient values. The purpose was to obtain analytical nutrient data for three highly consumed fresh pork products in the USDA National Nutrient Database for Stan ...
... Encroachment of nitrogen-fixing trees and shrubs into grasslands and savannas is a well-documented land cover change that occurs worldwide. In the Rio Grande Plains region of southern Texas, previous studies have shown woody encroachment by leguminous Prosopis glandulosa (mesquite) trees increases soil C and N, decreases microbial biomass N relative to soil N, and accelerates N mineralization and ...
... Potato zebra chip (ZC), caused by the bacterial pathogen ‘Candidatus Liberibacter solanacearum’, which is vectored by the potato psyllid (Bactericera cockerelli), has caused widespread damage to U.S. potato production ever since its first discovery in south Texas in 2000. To determine the influence of environmental factors and management practices on ZC occurrence, data on management and meteorolo ...
sediments; water quality; fluorides; sulfates; total dissolved solids; chlorides; groundwater flow; aquifers; drinking water; groundwater; Texas
Abstract:
... A vast region in north-central Texas, centering on Dallas–Fort Worth metroplex, suffers from intense groundwater drawdown and water quality degradation, which led to inclusion of 18 counties of this region into Priority Groundwater Management Areas. We combined aquifer-based and county-based hydrologic analyses to (1) assess spatio-temporal changes in groundwater level and quality between 1960 and ...
... To examine the variability of food portions served and consumed by African-American and Hispanic-American pre-school children attending Head Start. Cross-sectional. Food consumption by pre-schoolers (n 796) enrolled in sixteen Head Start centres in Houston, Texas (51 % boys, 42 % African-American, mean age 4 years) were assessed during 3 d of lunch meals using digital photography. Descriptive stat ...
... BACKGROUND: Food insecurity is associated with detrimental physical, psychological, behavioral, social, and educational functioning in children and adults. Greater than one-quarter of all Hispanic households in the U.S. are food insecure. Hispanic families in the U.S. comprise 30% of households with food insecurity at the child level, the most severe form of the condition. METHODS: Food security d ...
... We determined present-day (1981–2000) relationships between river network drainage density (Dd) and runoff (R), and between vegetation cover (V) and precipitation (P) across a contiguous 470,800km2 area (the Texas Gulf Coast basin), where P varies from 438 to 1280mm/yr. Dd(R) follows a saturation–growth model which is similar to process-based equilibrium landscape models. V(P) follows a linear rel ...
... One of the major scientific challenges and societal concerns is to make informed decisions to ensure sustainable groundwater availability when facing deep uncertainties. A major computational requirement associated with this is on-demand computing for risk analysis to support timely decision. This paper presents a scientific modeling service called ‘ModflowOnAzure’ which enables large-scale ensemb ...
... Maize (Zea mays L.) genetic diversity includes an array of kernel colors (red, blue, and purple), which are minimally used specialty corns when compared to yellow and white types commonly grown. Plant pigments are antioxidant phytochemicals produced as secondary metabolites. Antioxidants have been linked to various anticancer and other anti-inflammatory health benefits. Alternate colors have been ...
... The golden-cheeked warbler (Setophaga chrysoparia) and the black-and-white warbler (Mniotilta varia) breed in the deciduous/evergreen woodlands of central Texas. The golden-cheeked warbler is endemic, while for the geographically widespread, black-and-white warbler, these woodlands represent the southwestern terminus of the breeding range. To estimate relative abundance and to compare habitat asso ...
... We compared types and volume of prey in the diets of two whiptail lizards (Teiidae), Aspidoscelis marmorata (a bisexual species) and A. tesselata (a unisexual species) that occur syntopically in a Chihuahuan Desert landscape on Indio Mountains Research Station, Hudspeth County, Texas. Because their home ranges overlap extensively, we hypothesized that there would be dietary resource partitioning b ...
... Between February 14 and April 26, 2012, 75 broodmares (7 maiden, 11 barren, and 57 foaling) maintained on pasture in southeast Texas were examined three times weekly (Tuesday, Thursday, Saturday) by transrectal palpation and ultrasonography. On Tuesday or Thursday, mares in estrus with uterine edema, a relaxed cervix, and a dominant follicle ≥30-mm diameter were alternately assigned to treatment w ...
... Five experiments were conducted with beef steers to compare the effects of a reimplant program (Synovex Choice–Synovex Plus, SC-SP) on feedlot steer performance and carcass characteristics with those of a 1-implant program of Revalor-XS (RXS). Studies were conducted in Ordway, Colorado (n = 820); Morgan, Minnesota (n = 751); Cactus, Texas (n = 1,972); Larned, Kansas (n = 1,509); and Wellington, Co ...
... Two studies were conducted with beef steers to compare the effects of long-acting implants Synovex One (SYN-ONE) and Revalor-XS with each other and with the shorter-acting implant Synovex Plus (SYN-PLUS) on growth performance and carcass quality. Steers (n = 240, initial BW = 384 ± 4.0 kg) in Nebraska were administered SYN-ONE, SYN-PLUS, or Revalor-XS 161 d before slaughter. Steers (n = 300, initi ...
Gossypium hirsutum; Lygus hesperus; bolls; cotton; fiber quality; fruit set; insecticides; insects; irrigation; lint yield; plant damage; rearing; Texas
Abstract:
... A 3-yr field study quantified the compensatory ability of cotton (Gossypium hirsutum L.) to preflower fruit damage by Lygus hesperus Knight in the Texas High Plains under limited irrigation. Experiments were designed to achieve varying levels of preflower fruit loss by augmenting Lygus bug populations using nymphal bugs reared in a laboratory colony. Treatments included 1) three bugs per plant (3P ...
... Bacillus megaterium podophage Pony was isolated from a soil sample collected in College Station, TX. Here, we report the sequencing and annotation of the 39,844-bp genome of phage Pony and describe the major features identified. ...
... Rice sheath blight disease, caused by Rhizoctonia solani AG1-1A, is one of the most destructive rice diseases worldwide. Utilization of host resistance is the most economical and environmentally sound strategy in managing sheath blight (ShB). Ten ShB quantitative trait loci(QTLs) were previously mapped in a Lemont × Jasmine 85 recombinant inbred line (LJRIL) population using greenhouse inoculation ...
... Variation in mtDNA (cytb sequences) and six microsatellite loci was used to assess the conservation genetics and taxonomy of a group of populations of Gambusia in tributaries of the Rio Grande in Texas (USA) and Coahuila (Mexico): G. clarkhubbsi in San Felipe Creek, Texas, and G. krumholzi. The latter has been considered endemic to the Río de Nava of the Río La Compuerta system, Coahuila, but we f ...
... Bactericera cockerelli is a pest on multiple solanaceous crop plants and is the sole vector for the bacteria Candidatus Liberibacter psyllaurous. When the pathogen is present, feeding by these psyllids results in ‘vein greening’ disease in peppers and tomatoes, and “zebra chip” disease in potatoes. Currently, management is based entirely on the application of pesticides, including two neonicotinoi ...
consumer attitudes; drug therapy; drugs; humans; surveys
Abstract:
... The stockpiling and improper disposal of unused or expired medications has the potential to harm the environment and humans. Community-based medication take-back programs have been established to ensure proper disposal of unused drugs; however, few of these programs present consumers' perceptions about the program. Therefore, the main aims of this pilot study are 1) to assess the users' and non-us ...
case studies; coal; cooling; cooling systems; natural gas; ponds; power plants; steam; turbines; water utilization; Texas
Abstract:
... Large-scale U.S. dependence on thermoelectric (steam electric) generation requiring water for cooling underscores the need to understand controls on this water use. The study objective was to quantify water consumption and withdrawal for thermoelectric generation, identifying controls, using Texas as a case study. Water consumption for thermoelectricity in Texas in 2010 totaled ∼0.43 million acre ...
body mass index; breast neoplasms; healthy diet; nationalities and ethnic groups; physical activity; regression analysis; sociodemographic characteristics; surface area; vitamin D; vitamin D deficiency; vitamin status; women; women's health
Abstract:
... Inverse associations between circulating 25-hydroxyvitamin D [25(OH)D] and breast cancer stage have been reported, thus it is critical to understand the variables that contribute to 25(OH)D levels among women with breast cancer. Among 904 women in the Women's Healthy Eating and Living Study, plasma 25(OH)D concentrations were measured and data on demographic characteristics, diet, physical activit ...
... Herein, we describe a new analytical platform utilizing advances in heterogeneous supported lipid bilayer (SLB) electrophoresis and matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS) imaging. This platform allowed for the separation and visualization of both charged and neutral lipid membrane components without the need for extrinsic labels. A heterogeneous SLB was created us ...
Cynoscion nebulosus; body size; fish; heat tolerance; rearing; water temperature; Texas
Abstract:
... The critical thermal maximum of juvenile spotted seatrout (SL range 18–33 mm) was determined using a temperature increase of +0.26°C per hour. The critical thermal maximum (water temperature that was lethal to 50% of the test fish [LT ₅₀]) for trial 1 was LT ₅₀ = 38.8°C, LT ₅₀ = 39.4°C for trial 2, and LT ₅₀ = 38.9°C for trial 3. Critical thermal maximums differed significantly (P < 0.05) between ...
Sanchez Jessica L; Stoops Stacy B; Allan Nathan L; Cureton James C; Garrett Gary P; Kroll Christopher W; Lewis Richard H; Marsh-Matthews Edie; West Janalyn; Deaton Raelynn
Gambusia; biogeography; fish; mosquito control; population size; rivers; spring; Texas
Abstract:
... The largespring gambusia (Gambusia geiseri) is a livebearing fish likely endemic to the headwaters of the San Marcos River. This species thrives in cool headwater springs and, as a result of introductions for mosquito control, may now be invasive in many springs throughout Texas. Gambusia geiseri is believed to be outcompeting its endangered congener, G. nobilis, in the San Solomon Spring in weste ...
dissolved organic carbon; dissolved organic nitrogen; irrigation; land use; lawns and turf; metropolitan areas; sodicity; soil nutrient dynamics; urban parks; urban soils; water quality; Texas
Abstract:
... Release of dissolved organic carbon (DOC) and nitrogen (DON) from subtropical urban soils has had little investigation, even though the growth of metropolitan areas is unprecedented in southern states. The time of initial disturbance from native or agricultural to urban land use and irrigation with sodic water may compromise urban soilsʼ ability to retain DOC and DON. We examined 21 soils from ben ...
... The desire of skilled nursing facilities to increase quality of service to meet changes in residents’ expectations, improve marketability, and adhere to regulations warrant a new look at culture change and homelike dining as defined by residents in skilled nursing facilities (SNF). The objectives of this study were to determine residents’ home dining practices, to define residents’ desired dining ...
... Abundance estimators that account for imperfect detection, such as N-mixture models, assume that detection of individuals is independent of abundance. Using spot-mapping and N-mixture models applied to point-count data, we estimated abundance of Goldencheeked Warblers (Setophaga chrysoparia) in two years at six study sites at the Balcones Canyonlands Preserve, Austin, Texas. N-mixture model estima ...
... This study reports a survey conducted to find the South American palm weevil Rhynchophorus palmarum (L.) and the red palm weevil R. ferrugineus (Olivier) (Coleoptera: Curculionidae), 2 invasive species of palm trees. The study was performed in the Rio Grande Valley of south Texas and near the border with Tamaulipas state, Mexico. A total of 40 traps were inspected biweekly from 26 Sep 2011 to 20 S ...
algorithms; data collection; geophysics; image analysis; map overlay; models; subsidence; synthetic aperture radar; Texas; Virginia
Abstract:
... In this article, we introduce an approach for detecting evolving geophysical features within interferometric synthetic aperture radar (InSAR)-derived point cloud data sets. This approach is based on the availability of models describing both spatial and temporal behaviours of the geophysical features of interest. The model parameters are used to generate a multidimensional space that is then scann ...
... A study was undertaken at the Texas A&M Horse Center to evaluate and compare the effectiveness of three anthelmintics—ivermectin, fenbendazole, and a combination of ivermectin and pyrantel pamoate—on fecal egg count reductions of cyathostomes and Parascaris equorum in 30 naturally infected foals. The foals were randomized into three treatment groups, with individuals being rerandomized after each ...
... We identified 28 microsatellite loci from Popenaias popeii, a freshwater mussel that has experienced population declines throughout its range. Twenty loci were polymorphic, with 4–10 alleles, observed heterozygosity values of 0.375–1.00, and 16 % of alleles shared by more than one population. These loci should be useful for describing population genetic diversity, which will facilitate ongoing con ...
... The secret cave cricket, Ceuthophilus secretes Scudder (Orthroptera: Rhaphidophoridae), is an obligate trogloxene endemic to central Texas, USA, and is a primary source of energy and nutrients for sensitive cave ecosystems. In this study, nine polymorphic microsatellite markers were developed from genomic DNA of C. secretes. Genotypes of 120 individuals sampled from four localities on the Fort Hoo ...
... The purpose of this study was to examine the implementation, use, and sustainability of a computerized touch-screen diabetes education kiosk (Diosk) designed to provide “on-demand” education in a predominantly Latino community in South Texas. A pilot study was conducted to examine the implementation, use, and sustainability of the Diosk in 5 settings (eg, clinics, community centers, and pharmacies ...
amphibians; body size; climate change; climatic factors; hatching; phenology; temperature
Abstract:
... Climate-mediated shifts in species’ phenologies are expected to alter species interactions, but predicting the consequences of this is difficult because phenological shifts may be driven by different climate factors that may or may not be correlated. Temperature could be an important factor determining effects of phenological shifts by altering species’ growth rates and thereby the relative size r ...
aquifers; climate change; dissolved oxygen; endangered species; groundwater; indigenous species; karsts; linear models; mortality; regression analysis; salamanders and newts; springs (water); storms; temporal variation; water temperature; Texas
Abstract:
... Karst aquifers and springs provide the dissolved oxygen critical for survival of endemic stygophiles worldwide, but little is known about fluctuations of dissolved oxygen concentrations (DO) and factors that control those concentrations. We investigated temporal variation in DO at Barton Springs, Austin, Texas, USA. During 2006–2012, DO fluctuated by as much as a factor of 2, and at some periods d ...
... We examined the geographic extent of petroleum hydrocarbon contamination in sediment, seawater, biota, and seafood during/after the BP/Deepwater Horizon Oil Spill (April 20–July 15, 2010; 28.736667°N, −88.386944°W). TPH, PAHs, and 12 compound classes were examined, particularly C1-benzo(a)anthracenes/chrysenes, C-2-/C-4-phenanthrenes/anthracenes, and C3-naphthalenes. Sediment TPH, PAHs, and all cl ...
... This paper analyzes seasonal and diurnal variations of MODerate resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) data at ~1.1 km for the period of 2003–2011 over a region in West-Central Texas, where four of the world’s largest wind farms are located. Seasonal anomalies are created from MODIS Terra (~10:30 a.m. and 10:30 p.m. local solar time) and Aqua (~1:30 a.m. and 1: ...
Phytophthora nicotianae; annuals; forests; in vitro studies; industry; irrigation water; mefenoxam; ornamental horticulture; ornamental plants; streams; tissue culture; Georgia; North Carolina; South Carolina; Tennessee; Texas; Virginia
Abstract:
... Phytophthora isolates associated with ornamental plants or recovered from irrigation water in six states in the southeastern United States (Georgia, North Carolina, South Carolina, Tennessee, Texas, and Virginia) were identified and screened for sensitivity to mefenoxam. Isolates from forest and suburban streams in Georgia and Virginia were included for comparison. A new in vitro assay, utilizing ...
... Sphingobium sp. strain KK22 was isolated from a bacterial consortium that originated from cattle pasture soil from Texas. Strain KK22 grows on phenanthrene and has been shown to biotransform the high-molecular-weight (HMW) polycyclic aromatic hydrocarbon (PAH) benz[a]anthracene. The genome of strain KK22 was sequenced to investigate the genes involved in aromatic pollutant biotransformation. ...
... Native North American warm-season bunchgrasses have the potential to provide both forage and cellulosic bioenergy in drier regions of the southern Great Plains. Almost no information is available on the potential accumulations of many of these species under forage, bioenergy, or combined system harvests. Multiflower false rhodesgrass (MFR; Chloris pluriflora Fourn.), pink pappusgrass (PPG; Pappoph ...
Acer negundo; Carya illinoinensis; Celtis laevigata; Fraxinus; Quercus virginiana; Ulmus; Vitis mustangensis; coasts; digital database; ecoregions; floodplains; habitats; highlands; land cover; land use; marshes; phytosociology; prairies; riparian areas; rivers; shrubs; summer; topography; tree and stand measurements; trees; vines; Texas
Abstract:
... Little is known about the structure of riparian communities within the central Gulf coast of Texas. We present a phytosociological description of the riparian corridor within two contiguous sites along the Mission River in Refugio County, Texas, that differ in respect to tidal influence along the river, and compare this woody riparian community to others in Texas. In summer 2009 and 2010, we estab ...
Expanded Food and Nutrition Education Program; analysis of variance; demographic statistics; quality of life; teachers; Colorado; Georgia; Kansas; Minnesota; Missouri; Nebraska; Texas; Virginia
Abstract:
... Determine whether the Expanded Food and Nutrition Education Program (EFNEP) affects the quality of life (QOL) of its participants and educators.Longitudinal, where QOL was measured 3 times for participants (pre, post, 3-month delayed post) and educators (before and 6 and 12 months after training).Participants' and educators' QOL was measured in Colorado, Kansas, Missouri, and Nebraska. Georgia and ...
... Results are reported from a citizen-science program to study the ecology, behavior, and reproduction of an invasive population of Red-vented Bulbuls (Pycnonotus cafer) in Houston, Texas. The most frequent behaviors are foraging (n = 69), resting (n = 45), and calling (n = 29). The entire population occurred in urban areas. Bulbuls consumed berries (n = 8 species), fruits (n = 5), flowers (n = 5), ...
Cynodon dactylon; application rate; dimethenamid; dithiopyr; field experimentation; herbicide application; oryzalin; oxadiazon; pendimethalin; preemergent weed control; prodiamine; spring dead spot; turf grasses; Texas
Abstract:
... Field experiments were conducted in Texas to examine the recovery of a bermudagrass [ × (L.) Pers.] fairway from spring dead spot (SDS) disease following preemergence (PRE) herbicide applications. In 2011 and 2012 bermudagrass recovery from SDS in the non-treated check plots (46 and 59%, respectively) was similar to bermudagrass recovery in response to oxadiazon at 3.4 kg/ha (55 and 57%, respectiv ...
fire hazard; seedlings; mountains; fuels; trees; pinyon-juniper; woodlands; prescribed burning; stand basal area; forests; Texas
Abstract:
... We evaluated the effectiveness of four fire hazard mitigation techniques in piñon-juniper forests of the Davis Mountains Preserve in West Texas. Four replicate fuel treatments (thin only, thin + burn, burn only, and control) were implemented to assess the effects of fire and fire surrogates on fuel loadings. The results suggested that the thin only and the thin + burn treatments significantly alte ...
Phrynosoma; adults; adverse effects; anthropogenic activities; case studies; habitat conservation; habitat destruction; herpetofauna; home range; lizards; population size; spatial variation; survival rate; urban population; urbanization; wildlife; Texas
Abstract:
... Disturbance caused by habitat restoration or urbanization can threaten populations of sensitive wildlife species. We examined the effects of habitat disturbance on the ecology of an urban population of Texas Horned Lizards (Phrynosoma cornutum), a species of conservation concern in several states as a result of range-wide declines. We quantified changes in spatial distribution, survival rates, and ...
... Understanding how weather influences survival and reproduction is an important component of forecasting how climate change will influence wildlife population viability. Nest predation is the primary source of reproductive failure for passerine birds and can change in response to temperature. However, it is unclear which predator species are responsible for such patterns because predation events ar ...
basins; environmental models; oil spills; water pollution; Brazil; Texas
Abstract:
... Ocean forecasting and oil spill modelling and tracking are complex activities requiring specialised institutions. In this work we present a lighter solution based on the Operational Ocean Forecast Python Engine (OOFε) and the oil spill model General NOAA Operational Modelling Environment (GNOME). These two are robust relocatable and simple to implement and maintain. Implementations of the operatio ...
... Objective-To obtain epidemiological information on rabies in bats in Texas. Design-Epidemiological study. Sample-Laboratory reports of bats that had been submitted for rabies testing in Texas from 2001 through 2010. Procedures-Laboratory reports were reviewed to obtain information on seasonality of rabies in bats; distribution, species, and rabies virus variants of rabid bats; and human and domest ...
... This study examined the potential for regrowth of Escherichia coli in laboratory-incubated microcosms spiked with ultraviolet (UV)-disinfected sewage effluent and extracts derived from turfgrass or leaf litter. A second part of the study examined the potential of nutrients for predicting E. coli in two urban streams with point source effluent. Microcosms containing effluent and vegetation extracts ...
... Methods of estimating recharge in arid basin aquifers (such as the 1 % rule, Maxey-Eakin method, storm-runoff infiltration and others) overlook the potential contribution of direct recharge on the basin floors. In the Trans-Pecos region of west Texas, USA, this has resulted in potential recharge and solute flux to basin aquifers being ignored. Observed trends in groundwater nitrate (NO (sub 3) (su ...
Pantherophis; foraging; home range; radio telemetry; seeds; snakes; spatial data; Illinois; Texas
Abstract:
... We evaluated an automated telemetry system that can dramatically increase the amount of activity and spatial data collected for snakes. We developed methods for analyzing data from single automated receiving units (ARUs) and ARU arrays, compared results from ARUs with conventional hand tracking, and assessed previously untested assumptions used in conventional telemetry, using data from ratsnakes ...
... The continuing growth of poultry production, along with the increasing urbanization of rural areas, is leading to more odor-related complaints from neighboring communities and more scrutiny from policy makers. It is, therefore, in the best interest of poultry producers to look at control methods for abating odors. Previous studies have shown that substantial amounts of volatile and odorous compoun ...
Fontenot Brian E.; Hunt Laura R.; Hildenbrand Zacariah L.; Carlton Jr. Doug D.; Oka Hyppolite; Walton Jayme L.; Hopkins Dan; Osorio Alexandra; Bjorndal Bryan; Hu Qinhong H.; Schug Kevin A.
analytical chemistry; aquifers; arsenic; barium; drinking water; environmental protection; ethanol; hydrogeochemistry; methanol; natural gas; occupational accidents; oil fields; renewable energy sources; selenium; shale; strontium; total dissolved solids; water quality; water table; wells; Texas
Abstract:
... Natural gas has become a leading source of alternative energy with the advent of techniques to economically extract gas reserves from deep shale formations. Here, we present an assessment of private well water quality in aquifers overlying the Barnett Shale formation of North Texas. We evaluated samples from 100 private drinking water wells using analytical chemistry techniques. Analyses revealed ...
... Attaching telemetry transmitters to catfishes (family Ictaluridae) has historically been problematic. Current attachment techniques produce low retention rates or high mortality, or cause altered physiological or behavioral effects. We investigated an alternative attachment technique during three experiments in which external transmitters were fastened to the supraoccipital bone of Blue Catfish Ic ...
... Between 27 June 1997 and 16 May 1999, 423 rodents were collected from North Texas (Collin, Denton, and Grayson counties) by using Sherman live-traps (trapping success rate ∼22%). Of the 423 rodents collected, 328 were tested for evidence of IgG antibodies to New World hantaviruses. Hantavirus antibodies were detected in 34 individuals (∼10%). This is the first record of hantavirus antibody—positiv ...
... Preliminary analysis indicates a change with time in nickel (Ni), chromium (Cr), and lead (Pb) concentrations in sea bottom sediment samples which were collected during the falls of 2009, 2010, and 2011 along the continental shelf of the Eastern Gulf of Mexico. These samples bracket the Deepwater Horizon Oil Spill which occurred during the spring and summer of 2010. The sea bottom samples were col ...
... Environmental and management factors are critical in determining the C source or sink status of agroecosystems. Information on the C dynamics of an ecosystem from source to sink and vice versa are critical in determining the role of that ecosystem in regional and global C balances. We investigated the impact of the 2011 mega-drought on seasonal changes in net CO₂ exchange of a WW-B. Dahl Old World ...
breeding season; carbon; farms; greenhouse gas emissions; greenhouse gases; herd productivity; herds; hired labor; protein supplements; rain; Texas
Abstract:
... A Cobb-Douglas stochastic frontier function is estimated for the cow-calf enterprises in the Texas Rolling Plains using Standardized Performance Analysis (SPA) data. We find that factors promoting higher herd productivity include machinery investment, pasture-quality improvement, and protein supplement. In contrast, herd productivity is compromised by a longer breeding season, percentage of hired ...
... Huanglongbing (HLB), also known as citrus greening, is one of the most destructive citrus diseases worldwide and is seen as a major threat to the multimillion dollar citrus industry in California. The vector of the two bacterial species associated with this disease, Candidatus Liberibacter asiaticus and Ca. L. americanus, is the Asian citrus psyllid (ACP), Diaphorina citri (4). ACP was detected in ...
... For the conservation of artworks on paper, powdery paint layers on the paper matrix are stabilized with dilute solutions of adhesives (0.25–1 %), commonly gelatin or methylcellulose, which are applied as aerosols. This technique allows non-contact application. The distribution of the adhesives must be carefully controlled: they have to be delivered to unstable paint layers in the right quantity to ...
... Recovery efforts for the endangered ocelot (Leopardus pardalis) would be aided by knowledge of its feeding ecology in the affected region. We analyzed scat of ocelots and bobcats (Lynx rufus) from southern Texas. As has been found for most other populations of ocelots, rodents were the primary prey, but the principal species of rodent, the Mexican spiny pocket mouse (Liomys irroratus), is smaller ...
... Polyacrylonitrile hollow fiber ultrafiltration (UF) and polyamide spiral wound reverse osmosis (RO) membrane modules were surface-modified by contact with an aqueous solution containing dopamine to deposit polydopamine on the membrane surfaces and other wetted parts inside the modules. UF modules were further modified by grafting poly(ethylene glycol) (PEG) brushes to the polydopamine coating. Pol ...
... Optimizing the chemical composition of peanut (Arachis hypogaea L.) oil is essential for the production of biodiesel. Specifically, increasing the ratio of oleic to linoleic acid (O/L) in peanut oil and reducing the long chain saturated fatty acid concentration (which includes arachidic, behenic, and lignoceric acids) produces high-quality, stable methyl esters for biodiesel. Therefore, elucidatin ...
... The current interest in biodiesel production has resulted in a concurrent interest in increasing the oil concentration in high-yielding cultivars, which could make peanuts (Arachis hypogaea.) more desirable as a biofuel source. Currently, peanut seed is approximately 450 to 500 g kg⁻¹ oil on a dry weight basis, depending upon location grown, and there is relatively little genetic variation for oil ...
... To better define the strains and species of Hepatozoon that infect coyotes in the south-central United States, whole blood and muscle samples were collected from 44 coyotes from 6 locations in Oklahoma and Texas. Samples were evaluated by a nested polymerase chain reaction (PCR) using primers amplifying a variable region of the apicomplexan 18S rRNA gene as well as histopathology (muscle only) for ...
Laridae; breeds; coasts; genetic markers; genetic variation; habitats; nucleotide sequences; population; population dynamics; taxonomy; California; Texas; Virginia
Abstract:
... Gull-billed Terns (Gelochelidon nilotica) are among the most widespread, yet scarce, Charadriiformes in the world. Two subspecies are recognized in the United States: G. n. aranea breeds along the U.S. Atlantic and Gulf coasts and G. n. vanrossemi breeds in the Salton Sea and San Diego Bay of California. Conservation concerns exist for the species due to its low abundance in the United States and ...
Pinus taeda; forest trees; genetic variation; heterozygosity; inbreeding; linkage disequilibrium; marker-assisted selection; outcrossing; population structure; single nucleotide polymorphism; Texas
Abstract:
... First-generation selection (FGS) and second-generation selection (SGS) breeding populations of loblolly pine from east Texas were studied to estimate the genetic diversity, population structure, linkage disequilibrium (LD), signatures of selection and association of breeding traits with a genome-wide panel of 4,264 single nucleotide polymorphisms (SNPs). Relatively high levels of observed (H ₒ = 0 ...
... Grain sorghum (Sorghum bicolor L. Moench) is one of several caryopses that can be popped, but there is little information on the relative popping capacity of different sorghum varieties. The objectives of this study were to assess the variation among sorghum genotypes for popping and to determine the relative effects of genotype and environment on those traits. Eight grain sorghum entries differin ...
... Growth and leaf functional trait variation among genotypes of a geographically widespread dominant species could provide insight into mechanisms of local adaptation and may be important for predicting species and ecosystem responses to environmental change. Under common garden conditions, we grew nine genotypes of the dominant C4-tallgrass prairie species Panicum virgatum L. (switchgrass) represen ...
... We report on gonopodial structures in the western mosquitofish (Gambusia affinis) including forked distal hooks and presence-absence of the elbow and gap. In addition, we present information on gonopodial variation across the Trinity, San Jacinto, and Brazos river drainages in Texas. ...
... Research was conducted in Texas from 2010 through 2012 to evaluate combinations of pyrasulfotole plus bromoxynil for weed control and grain sorghum [Sorghum bicolor (L.) Moench] response. In most instances, combinations of pyrasulfotole plus bromoxynil applied early postemergence controlled Palmer amaranth (Amaranthus palmeri S. Wats), devil’s-claw [Proboscidea louisianica (Mill.) Thellung], pitte ...
... Field studies were conducted in 2008 and 2009 at three locations on the Texas Southern High Plains to evaluate grain sorghum response to saflufenacil alone or in combination with dimethenamid. Hybrids ‘Pioneer 85G01’ and ‘Dekalb 44-20’ were planted and saflufenacil at 0.5–0.70 kg ai ha−1 or saflufenacil + dimethenamid at 0.05 + 0.44 to 0.2 + 1.75 kg ai ha−1 was applied preemergence. Injury to sorg ...
... We report the first record of the greater mastiff bat Eumops perotis from Oklahoma. This specimen represents a 1,000 km range extension from the nearest reported occurrences in the Trans Pecos and Big Bend regions of Texas. ...
ammonium nitrogen; community development; drainage; green infrastructure; nitrate nitrogen; pollution load; stormwater; stormwater management; stream flow; streams; water quality; Texas
Abstract:
... Green infrastructure (GI) design is advocated as a new paradigm for stormwater management, whereas current knowledge of GI design is mostly based on isolated design strategies used at small-scale sites. This study presents empirical findings from two watershed-scale community projects (89.4 km2 and 55.7 km2) in suburban Houston, Texas. The GI development integrates a suite of on-site, infiltration ...
... Harmostes reflexulus (Say) is a bivoltine inflorescence specialist that tracks a succession of host composites (Asteraceae), typically remaining on a host until seed set. During fieldwork from 1998 to 2011, the rhopalid′s host plants were recorded (124 collections) in Arizona, Colorado, Nebraska, New Mexico, Oklahoma, Oregon, Texas, and Wyoming. Twenty-six species of the subfamily Asteroideae on w ...
... Rift Valley fever is a vector-borne zoonotic disease which causes high morbidity and mortality in livestock. In the event Rift Valley fever virus is introduced to the United States or other non-endemic areas, understanding the potential patterns of spread and the areas at risk based on disease vectors and hosts will be vital for developing mitigation strategies. Presented here is a general network ...
Pelecanus occidentalis; adults; coasts; females; grasslands; habitats; home range; males; wetlands; Alabama; Gulf of Mexico; Louisiana; Mexico; Mississippi; Texas
Abstract:
... Little is known about movements and habitat use of Brown Pelicans (Pelecanus occidentalis) in the northern Gulf of Mexico. We attached satellite transmitters to 18 adult Brown Pelicans (nine males, nine females) that were captured on Grand Isle along the Louisiana coast during 31 August–2 September 2010. Their movements and habitat use were tracked between September 2010 and March 2012. Nine of th ...
The Nature Conservancy; cattle; conservation areas; fire regime; fire scars; fire severity; forest fires; forest stands; forests; humans; land use; mountains; national parks; sheep; species diversity; stand structure; tree age; Chihuahuan Desert; Texas
Abstract:
... Recent research in isolated sites in southwestern North America suggests that spatial variation in land use history can result in differences in the dates of fire exclusion onset and the extent to which forests have changed in response to fire cessation. We investigated the relationships among fire, land use, and forest structure in three mountain ranges that straddle the Texas–Mexico border inclu ...
Diospyros texana; Juniperus ashei; Quercus virginiana; Ulmus; bedrock; drought; mortality; persimmons; rhizosphere; root growth; sap flow; stable isotopes; tree mortality; trees; water analysis; water potential; wood density; xylem; Texas
Abstract:
... An important component of the hydrological niche involves the partitioning of water sources, but in landscapes characterized by shallow soils over fractured bedrock, root growth is highly constrained. We conducted a study to determine how physical constraints in the root zone affected the water use of three tree species that commonly coexist on the Edwards Plateau of central Texas; cedar elm (Ulmu ...