bluuebunny/crossref_metadata_2025_split huggingface dataset:
Environmental differences in substrate mechanics do not affect sprinting performance in sand lizards (Uma scoparia and Callisaurus draconoides)
Authors: Korff Wyatt L. , McHenry Matthew J. 
Published: December 2010

SUMMARY
Running performance depends on a mechanical interaction between the feet of an animal and the substrate. This interaction may differ between two species of sand lizard from the Mojave Desert that have different locomotor morphologies and habitat distributions. Uma scorparia possesses toe fringes and inhabits dunes, whereas the closely related Callisaurus draconoides lacks fringes and is found on dune and wash habitats. The present study evaluated whether these distribution patterns are related to differential locomotor performance on the fine sand of the dunes and the course sand of the wash habitat. We measured the kinematics of sprinting and characterized differences in grain size distribution and surface strength of the soil in both habitats. Although wash sand had a surface strength (15.4±6.2 kPa) that was more than three times that of dune sand (4.7±2.1 kPa), both species ran with similar sprinting performance on the two types of soil. The broadly distributed C. draconoides ran with a slightly (22%) faster maximum speed (2.2±0.2 m s–1) than the dune-dwelling U. scorparia (1.8±0.2 m s–1) on dune sand, but not on wash sand. Furthermore, there were no significant differences in maximum acceleration or the time to attain maximum speed between species or between substrates. These results suggest that differences in habitat distribution between these species are not related to locomotor performance and that sprinting ability is dominated neither by environmental differences in substrate nor the presence of toe fringes.
Visualizing a set of olfactory sensory neurons responding to a bile salt
Authors: Døving Kjell B. , Hansson Kenth-Arne , Backström Tobias , Hamdani El Hassan 
Published: December 2010

SUMMARYIn the present study, we exposed the olfactory epithelia of crucian carp, Carassius carassius, and brown trout, Salmo trutta, to dextran coupled with Alexa dyes together with odorants. Dye uptake was severely reduced after pre-exposure to nocodazole, an inhibitor of microtubule polymerization that impairs endocytosis, supporting the hypothesis that odour-activated olfactory receptor molecules undergo endocytosis. Application of the bile acid taurolithocholate, a potent and specific odorant for fish, resulted in the labelling of a sparse (less than 3%) cell population with the typical morphology of ciliated sensory neurons (CSNs) – long dendrites and cell somata deep in the sensory epithelium. The dye was distributed throughout the sensory neuron, also revealing axons and target glomeruli. Stained axons redistribute at the entrance of the olfactory bulb and terminate in two small target areas, a dorsal and a medial one. These results are consistent with the notion that taurolithocholate is detected specifically by a few ciliated sensory neurons. Application of the olfactory epithelium of brown trout to bile acid stained cells with the appearance of CSNs. Application of an alarm agonist, hypxanthine-3-N-oxide, to crucian carp olfactory organ caused staining of another set of sensory neurons. Furthermore, our results show that odour-induced uptake of a dye can serve to identify the subtype of olfactory sensory neurons responding to a particular odorant, and to pinpoint the target regions of these neurons in the olfactory bulb as a first step to elucidating the neuronal network responding to a particular odour.
State-dependent physiological maintenance in a long-lived ectotherm, the painted turtle (Chrysemys picta)
Authors: Schwanz Lisa , Warner Daniel A. , McGaugh Suzanne , Di Terlizzi Roberta , Bronikowski Anne 
Published: December 2010

SUMMARYEnergy allocation among somatic maintenance, reproduction and growth varies not only among species, but among individuals according to states such as age, sex and season. Little research has been conducted on the somatic (physiological) maintenance of long-lived organisms, particularly ectotherms such as reptiles. In this study, we examined sex differences and age- and season-related variation in immune function and DNA repair efficiency in a long-lived reptile, the painted turtle (Chrysemys picta). Immune components tended to be depressed during hibernation, in winter, compared with autumn or spring. Increased heterophil count during hibernation provided the only support for winter immunoenhancement. In juvenile and adult turtles, we found little evidence for senescence in physiological maintenance, consistent with predictions for long-lived organisms. Among immune components, swelling in response to phytohemagglutinin (PHA) and control injection increased with age, whereas basophil count decreased with age. Hatchling turtles had reduced basophil counts and natural antibodies, indicative of an immature immune system, but demonstrated higher DNA repair efficiency than older turtles. Reproductively mature turtles had reduced lymphocytes compared with juvenile turtles in the spring, presumably driven by a trade-off between maintenance and reproduction. Sex had little influence on physiological maintenance. These results suggest that components of physiological maintenance are modulated differentially according to individual state and highlight the need for more research on the multiple components of physiological maintenance in animals of variable states.
Flowers help bees cope with uncertainty: signal detection and the function of floral complexity
Authors: Leonard Anne S. , Dornhaus Anna , Papaj Daniel R. 
Published: December 2010

SUMMARY
Plants often attract pollinators with floral displays composed of visual, olfactory, tactile and gustatory stimuli. Since pollinators' responses to each of these stimuli are usually studied independently, the question of why plants produce multi-component floral displays remains relatively unexplored. Here we used signal detection theory to test the hypothesis that complex displays reduce a pollinator's uncertainty about the floral signal. Specifically, we asked whether one component of the floral display, scent, improved a bee's certainty about the value of another component, color hue. We first trained two groups of bumble bees (Bombus impatiens Cresson) to discriminate between rewarding and unrewarding artificial flowers of slightly different hues in the presence vs absence of scent. In a test phase, we presented these bees with a gradient of floral hues and assessed their ability to identify the hue rewarded during training. We interpreted the extent to which bees' preferences were biased away from the unrewarding hue (‘peak shift’) as an indicator of uncertainty in color discrimination. Our data show that the presence of an olfactory signal reduces uncertainty regarding color: not only was color learning facilitated on scented flowers but also bees showed a lower amount of peak shift in the presence of scent. We explore potential mechanisms by which scent might reduce uncertainty about color, and discuss the broader significance of our results for our understanding of signal evolution.
Effects of increased injection pressures of up to 1000 bar – opportunities in stratified operation in a direct-injection spark-ignition engine
Authors: Buri S , Kubach H , Spicher U 
Published: December 2010

The gasoline direct-injection engine with spray-guided combustion is one of the most promising strategies to reduce fuel consumption and CO2 emissions of spark-ignition engines. This benefit results primarily from lean and unthrottled operation, which is realized with a highly stratified mixture at part load. At the upper load limit of stratified charge operation, charge stratification is insufficient to realize substantial fuel economy benefits, especially when using multihole injectors. This can be attributed to a lower injector flowrate than is available from outward-opening piezo injectors. One measure to increase the flowrate is to increase the injection pressure. A higher stratification gradient thereby can be achieved, which leads to combustion at richer air–fuel ratios. As a result, combustion duration and hydrocarbon emissions decrease. The enhanced evaporation due to the increased injection pressure reduces soot emissions. This paper presents the results of thermodynamic and optical investigations at the upper load limit of stratified charge operation in a spray-guided direct-injection engine. To this end, variations of the injection pressure from 200 to 1000 bar are performed. The associated effects on mixture preparation and soot formation are investigated. The mixture preparation process and flame propagation information are recorded using a high-speed intensified complementary metal oxide semiconductor (CMOS) camera. In order to investigate soot formation and oxidation behaviour, soot concentrations are measured using the extended two-colour method.
Identification and Prevention of Antiretroviral Medication Errors at an Academic Medical Center
Authors: Horace Alexis E , Philips Marjorie 
Published: December 2010

Background Patients with human immunodeficiency virus (HIV) taking antiretroviral therapy are at an increased risk for medication-related problems when transitioning into the inpatient setting. Methodology A retrospective chart review was used to find common highly active antiretroviral therapy (HAART)-related medication problems for 50 adult and pediatric patients who were admitted during the calendar year 2007 with a diagnosis of HIV at a 478-bed academic medical center. The results from the retrospective review were used to design a pilot program that consisted of a pharmacist making interventions when potential medication-related problems were identified. Data were collected after implementation of the program to assess whether this corrective measure decreased medication concerns associated with HAART. Results Results from the retrospective review revealed that 24% of patients did not have a complete home medication list on admission. HAART was discontinued in 21 patients (42%) and, of these, 14 patients (67%) did not have an appropriate reason documented. Antiretroviral medications were not appropriately dosed and scheduled for 18% of patients. For patients managed by the pilot program, the documentation of home medication lists improved by 24% and matching inpatient orders to the patient's home regimens improved by 26%. Only 9% of the HIV patients admitted had their medications discontinued for more than 24 hours, and all of those patients had an appropriate reason documented. The rate at which antiretroviral medications were appropriately dosed and scheduled increased by 21%. Conclusion Pharmacists can play a vital role in reducing medication errors for HIV patients admitted to the hospital.
Perspectives: Small-Team Synergy: A Multiperspective Systems Approach
Authors: Stasio Michael J. 
Published: December 2010

“I think we can all agree that long-duration mission training and development must prepare crews to handle not only extreme circumstances but also the ups and downs of daily life.” Fear is normal. … Courage is not the absence of fear. … We cannot live long enough to make all the mistakes ourselves. … We must learn from our own as well as others' experiences. — Captain Chesley “Sully” Sullenberger, Celebrity Forum Speakers Series, October 1, 2010
Novel GLIS3 mutations demonstrate an extended multisystem phenotype
Authors: Dimitri P , Warner J T , Minton J A L , Patch A M , Ellard S , Hattersley A T , Barr S , Hawkes D , Wales J K , Gregory J W 
Published: December 2010

IntroductionMutations in the GLI-similar 3 (GLIS3) gene encoding the transcription factor GLIS3 are a rare cause of neonatal diabetes and congenital hypothyroidism with six affected cases from three families reported to date. Additional features, described previously, include congenital glaucoma, hepatic fibrosis, polycystic kidneys, developmental delay and facial dysmorphism.SubjectsWe report two new cases from unrelated families with distinct novel homozygous partial GLIS3 deletions. Both patients presented with neonatal diabetes mellitus, severe resistant hypothyroidism in the presence of elevated thyroglobulin and normal thyroid anatomy, degenerative liver disease, cystic renal dysplasia, recurrent infections and facial dysmorphism. These novel mutations have also resulted in osteopenia, bilateral sensorineural deafness and pancreatic exocrine insufficiency, features that have not previously been associated with GLIS3 mutations. Gene dosage analysis showed that the parents were carriers of a deletion encompassing exons 1–2 (case 1) or exons 1–4 (case 2) of the 11 exon gene. Genome-wide SNP analysis did not reveal a common ancestral GLIS3 haplotype in patient 2.ConclusionsOur results confirm partial gene deletions as the most common type of GLIS3 mutations, accounting for four of five families identified to date. We propose that mutations in GLIS3 lead to a wider clinical phenotype than previously recognised. We also report the first case of a recessive GLIS3 mutation causing neonatal diabetes and congenital hypothyroidism in a child from a non-consanguineous pedigree, highlighting the importance of molecular genetic testing in any patient with this phenotype.
Forecasting Weed Distributions using Climate Data: A GIS Early Warning Tool
Authors: Jarnevich Catherine S. , Holcombe Tracy R. , Barnett David T. , Stohlgren Thomas J. , Kartesz John T. 
Published: December 2010

AbstractThe number of invasive exotic plant species establishing in the United States is continuing to rise. When prevention of exotic species from entering into a country fails at the national level and the species establishes, reproduces, spreads, and becomes invasive, the most successful action at a local level is early detection followed by eradication. We have developed a simple geographic information system (GIS) analysis for developing watch lists for early detection of invasive exotic plants that relies upon currently available species distribution data coupled with environmental data to aid in describing coarse-scale potential distributions. This GIS analysis tool develops environmental envelopes for species based upon the known distribution of a species thought to be invasive and represents the first approximation of its potential habitat while the necessary data are collected to perform more in-depth analyses. To validate this method we looked at a time series of species distributions for 66 species in Pacific Northwest and northern Rocky Mountain counties. The time series analysis presented here did select counties that the invasive exotic weeds invaded in subsequent years, showing that this technique could be useful in developing watch lists for the spread of particular exotic species. We applied this same habitat-matching model based upon bioclimatic envelopes to 100 invasive exotics with various levels of known distributions within continental U.S. counties. For species with climatically limited distributions, county watch lists describe county-specific vulnerability to invasion. Species with matching habitats in a county would be added to that county's list. These watch lists can influence management decisions for early warning, control prioritization, and targeted research to determine specific locations within vulnerable counties. This tool provides useful information for rapid assessment of the potential distribution based upon climate envelopes of current distributions for new invasive exotic species.
Distribution and Ecotypic Variation of the Invasive Annual Barb Goatgrass (Aegilops triuncialis) on Serpentine Soil
Authors: Lyons Kelly G. , Shapiro A. M. , Schwartz Mark W. 
Published: December 2010

AbstractSuccessful colonization of newly introduced species is driven by a multitude of factors and is highly dependent on the species. It has long been hypothesized that preadaptation and postestablishment natural selection of introduced species can facilitate their invasion; however, to date, limited research has been dedicated to these theories. In addition, although the correlation between establishment of invasive species and disturbance has been noted and widely studied, the susceptibility of undisturbed habitats to invasion remains unclear. In California, serpentine habitats are severe edaphic environments that have been relatively free of anthropogenic disturbance and nonindigenous species invasions. In this study, we documented the occurrence of the nonindigenous barb goatgrass on serpentine and nonserpentine grasslands in the California Northern Interior Coast Range and the western foothills of the Sierra Nevada Mountains and conducted greenhouse and field experiments to assess the species' degree of adaptation to serpentine soils. Reconnaissance of serpentine intrusions and yearly monitoring suggest that barb goatgrass may grow preferentially on serpentine soil, particularly disturbed serpentine sites. In the greenhouse, for most measures of performance, serpentine populations performed better than nonserpentine populations when grown on serpentine soil. Particularly noteworthy was that serpentine populations had higher root-mass ratios than nonserpentine populations when grown on serpentine soil. In contrast to the greenhouse study, field-grown populations from serpentine and nonserpentine sources performed equally well on nonserpentine; alluvial, disturbed serpentine; and shallow, undisturbed serpentine, although the overall species' performance was diminished on severe serpentine soils. Alarmingly, even in the absence of previous exposure to serpentine, barb goatgrass was capable of establishing and spreading into minimally disturbed sites with strong serpentinitic characteristics.
California Invasive Plant Research Needs Assessment
Authors: Robison Ramona , Schoenig Steve , Johnson Douglas W. , Brusati Elizabeth , DiTomaso Joseph M. 
Published: December 2010

AbstractThis project summarizes the opinion of 52 experts on the future research needs in the area of invasive plants in California. Experts included academics at private and public universities, Cooperative Extension educators, land managers, members of nongovernmental organizations (NGOs), employees of restoration companies, and federal, state, and local agency personnel. Surveys were conducted through in-person interviews, written questionnaires, and workshops. The objective was to identify high-priority needs for future research on issues related to invasive plants in California's wildlands. More specifically, the goals were to (1) create a forum for assessing high-priority research needs, (2) guide future research toward these high-priority needs, and (3) facilitate connections and interactions among academic disciplines and between researchers and practitioners by increasing awareness of the range of ongoing research on invasive plants. Priority needs were chosen for 10 broad research topic areas, with specific subtopics addressed within each of these areas. In addition to noting specific research areas, there was a general need expressed for a synthesis of existing scientific information, particularly about the biology and ecology of invasive plants and the ecological impacts, control and management tools, restoration activities, and related social issues surrounding invasive plants. A mutual exchange of information was also considered important among the academic researcher and the field practitioner, as was the development of more effective training programs for land managers.
Efficacy of Mechanical and Herbicide Control Methods for Scotch Broom (Cytisus scoparius) and Cost Analysis of Chemical Control Options
Authors: Oneto Scott R. , Kyser Guy B. , DiTomaso Joseph M. 
Published: December 2010

AbstractScotch broom is an invasive leguminous shrub in California and other Pacific Northwest states, as well as New Zealand and Australia. It is highly competitive in forest and shrub communities and can significantly impact reestablishment of conifer forests. The objective of this experiment was to evaluate mechanical methods (Weed Wrench, lopping), several herbicides, and herbicide application techniques for control of Scotch broom in a premontane site in California. Three herbicides were evaluated (glyphosate, imazapyr, and triclopyr ester) for canopy reduction using foliar, drizzle, and basal bark treatments. All treatments were made in both fall and late spring. In addition, we conducted a cost analysis of the various herbicide treatments and application methods. Results indicate that both mechanical treatments were effective, but their optimum timing depended on soil moisture conditions. In addition, there were no significant differences among herbicides at both timings, among all rates, and for any application method. All herbicides provided effective control of Scotch broom. However, the cost analysis demonstrated that the drizzle application method with glyphosate was the most cost-effective treatment, due to low herbicide cost and reduced labor requirements. These results provide several options for Scotch broom control and give land managers considerable flexibility with timing, herbicide, and application technique in their management programs.
Identification and Control of Invasive Privets (Ligustrumspp.) in the Middle Southern United States
Authors: Maddox Victor , Byrd John , Serviss Brett 
Published: December 2010

AbstractThe identification of privet in the middle southern United States can be difficult. Because most introduced species of privet can be invasive, and recent mapping projects seek location and species population data, proper identification is important. Without proper identification of privet species, data on species distributions and other pertinent information regarding invasiveness could lead to improper conclusions. Currently, information on privet identification is scattered throughout a number of reference materials. The purpose of this publication is to assist with the proper identification of escaped privet species, and suggest management options.
Managing Widespread, Alien Plant Species to Ensure Biodiversity Conservation: A Case Study Using an 11-Step Planning Process
Authors: Downey Paul O. 
Published: December 2010

AbstractOne of the greatest threats to biodiversity is the invasion of ecological communities by alien plants. Management strategies for alien plants, however, rarely focus on specific biodiversity-conservation outcomes, and recovery actions rarely address the threat on a landscape scale. There are many reasons for these failures, including (1) limited knowledge of the native species at risk, (2) a disconnect between policy and management, (3) a disconnect between the fields of weed science and biodiversity conservation, (4) a dearth of data from management actions (for both threat abatement and recovery), and (5) the broadly held assumption that control of alien plants will by itself lead to a positive biodiversity response is often incorrect. Thus, alien plant management strategies with a conservation aim need to include planning processes and assessment measures to ensure that the aim is achieved. Here, I outline an example of the planning steps needed to ensure that the management of widespread alien plant species achieves the greatest possible conservation outcome, using the alien plant program for bitou bush (Chrysanthemoides monilifena) as a case study. In addition, I present an overview of the challenges faced and solutions developed during the transition from planning to management, along with some initial data to demonstrate the success and value of this investment in both planning and implementation during the past decade. Interim results from a series of sites have highlighted the success of the program and led to the program being acknowledged as an important ecological restoration project in Australasia. This success is highly dependent on extensive stakeholder involvement (across land tenures), dedicated coordination, and leadership. The planning process is now being adopted for other alien plants in Australia and can be modified to abate the threat from other alien organisms or other threats to biodiversity because the principles of each step are fundamentally similar.