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https://www.readbyqxmd.com/read/27909817/phylogenetic-structure-of-arbuscular-mycorrhizal-fungal-communities-along-an-elevation-gradient
#1
Cameron P Egan, Ragan M Callaway, Miranda M Hart, Jason Pither, John Klironomos
Despite the importance of arbuscular mycorrhizal (AM) fungi within terrestrial ecosystems, we know little about how natural AM fungal communities are structured. To date, the majority of studies examining AM fungal community diversity have focused on single habitats with similar environmental conditions, with relatively few studies having assessed the diversity of AM fungi over large-scale environmental gradients. In this study, we characterized AM fungal communities in the soil along a high-elevation gradient in the North American Rocky Mountains...
December 1, 2016: Mycorrhiza
https://www.readbyqxmd.com/read/27909816/ecological-and-physical-barriers-shape-genetic-structure-of-the-alpine-porcini-boletus-reticuloceps
#2
Bang Feng, Jian Wei Liu, Jianping Xu, Kuan Zhao, Zai Wei Ge, Zhu L Yang
The Alpine porcini, Boletus reticuloceps, is an ectomycorrhizal mushroom distributed in subalpine areas of Southwest China, central China, and Taiwan Island. This distribution pattern makes it an ideal organism to infer how ectomycorrhizal fungi have reacted to historical tectonic and climatic changes, and to illustrate the mechanism for the disjunction of organisms between Southwest China and Taiwan. In this study, we explored the phylogeographic pattern of B. reticuloceps by microsatellite genotyping, DNA sequencing, ecological factor analysis, and species distribution modeling...
December 1, 2016: Mycorrhiza
https://www.readbyqxmd.com/read/27908625/a-novel-integrated-modelling-framework-to-assess-the-impacts-of-climate-and-socio-economic-drivers-on-land-use-and-water-quality
#3
Matthias Zessner, Martin Schönhart, Juraj Parajka, Helene Trautvetter, Hermine Mitter, Mathias Kirchner, Gerold Hepp, Alfred Paul Blaschke, Birgit Strenn, Erwin Schmid
Changes in climatic conditions will directly affect the quality and quantity of water resources. Further on, they will affect them indirectly through adaptation in land use which ultimately influences diffuse nutrient emissions to rivers and therefore potentially the compliance with good ecological status according to the EU Water Framework Directive (WFD). We present an integrated impact modelling framework (IIMF) to track and quantify direct and indirect pollution impacts along policy-economy-climate-agriculture-water interfaces...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27907263/seasonal-patterns-in-%C3%AE-2-h-values-of-multiple-tissues-from-andean-birds-provide-insights-into-elevational-migration
#4
Mariana Villegas, Seth D Newsome, John G Blake
Elevational migration is a widespread phenomenon in tropical avifauna but it is difficult to identify using traditional approaches. Hydrogen isotope (δ(2) H) values of precipitation decrease with elevation so δ(2) H analysis of multiple bird tissues with different isotopic incorporation rates may be a reliable method for characterizing seasonal elevational migration. Here we compare δ(2) H values in metabolically inert (feathers and claws) and metabolically active (whole blood) tissues to examine whether an upslope migration occurs prior to the breeding season in the Yungas Manakin (Chiroxiphia boliviana)...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27907251/climate-influences-on-whitebark-pine-mortality-from-mountain-pine-beetle-in-the-greater-yellowstone-ecosystem
#5
Polly C Buotte, Jeffrey A Hicke, Haiganoush K Preisler, John T Abatzoglou, Kenneth F Raffa, Jesse A Logan
Extensive mortality of whitebark pine, beginning in the early to mid-2000s, occurred in the Greater Yellowstone Ecosystem (GYE) of the western USA, primarily from mountain pine beetle but also from other threats such as white pine blister rust. The climatic drivers of this recent mortality and the potential for future whitebark pine mortality from mountain pine beetle are not well understood, yet are important considerations in whether to list whitebark pine as a threatened or endangered species. We sought to increase the understanding of climate influences on mountain pine beetle outbreaks in whitebark pine forests, which are less well understood than in lodgepole pine, by quantifying climate-beetle relationships, analyzing climate influences during the recent outbreak, and estimating the suitability of future climate for beetle outbreaks...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27907209/correction-climate-demography-and-zoogeography-predict-introgression-thresholds-in-salmonid-hybrid-zones-in-rocky-mountain-streams
#6
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0163563.].
2016: PloS One
https://www.readbyqxmd.com/read/27907193/phylogenetic-lineages-and-postglacial-dispersal-dynamics-characterize-the-genetic-structure-of-the-tick-ixodes-ricinus-in-northwest-europe
#7
Knut H Røed, Kjersti S Kvie, Gunnar Hasle, Lucy Gilbert, Hans Petter Leinaas
Dispersal and gene flow are important mechanisms affecting the dynamics of vectors and their pathogens. Here, patterns of genetic diversity were analyzed in many North European populations of the tick, Ixodes ricinus. Population sites were selected within and between areas separated by geographical barriers in order to evaluate the importance of tick transportation by birds in producing genetic connectivity across open sea and mountain ranges. The phylogenetic analyses of the mitochondrial control region and the cytochrome b gene revealed two distinct clades with supported sub-clades, with three genetic lineages: GB and WNo associated with Great Britain and western Norway respectively, and Eu with a wider distribution across continental Europe in agreement with much lower efficiency of tick dispersal by birds than by large mammals...
2016: PloS One
https://www.readbyqxmd.com/read/27907078/signal-of-acceleration-and-physical-mechanism-of-water-cycle-in-xinjiang-china
#8
Guo-Lin Feng, Yong-Ping Wu
Global warming accelerates water cycle with features of regional difference. However, little is known about the physical mechanism behind the phenomenon. To reveal the links between water cycle and climatic environment, we analyzed the changes of water cycle elements and their relationships with climatic and environmental factors. We found that when global warming was significant during the period of 1986-2003, the precipitation in Tarim mountains as well as Xinjiang increased rapidly except for Tarim plains, which indicated that there existed a signal of acceleration for water cycle in Xinjiang...
2016: PloS One
https://www.readbyqxmd.com/read/27906155/-prevalence-of-hypothyroidism-in-andalusia-spain-determined-by-thyroid-hormone-comsumption
#9
José Escribano-Serrano, José Mancera-Romero, Vanessa Santos-Sánchez, Carolina Payá-Giner, Mª Isabel Méndez-Esteban, Antonio García-Bonilla, Manuela Márquez-Ferrando, Antonio Hormigo-Pozo, Alfredo Michán-Doña
OBJECTIVE: Hypothyroidism is the most common condition linked to a hormone deficiency, nevertheless data on its prevalence are scarce in Spain. For that reason, we have estimated its prevalence through the registration of patients who had used thyroid hormones in Andalusia (South Spain). METHODS: Data of patients who had withdrawn levothyroxine under the public system during 2014 from the base of the Andalusian Health Service were considered. Prevalence were calculated with confidence intervals of 95% for each management area, stratified by sex and age groups, and differences between them were evaluated...
December 2, 2016: Revista Española de Salud Pública
https://www.readbyqxmd.com/read/27904966/treeline-advances-and-associated-shifts-in-the-ground-vegetation-alter-fine-root-dynamics-and-mycelia-production-in-the-south-and-polar-urals
#10
Emily F Solly, Ika Djukic, Pavel A Moiseev, Nelly I Andreyashkina, Nadezhda M Devi, Hans Göransson, Valeriy S Mazepa, Stepan G Shiyatov, Marina R Trubina, Fritz H Schweingruber, Martin Wilmking, Frank Hagedorn
Climate warming is shifting the elevational boundary between forests and tundra upwards, but the related belowground responses are poorly understood. In the pristine South and Polar Urals with shifts of the treeline ecotone documented by historical photographs, we investigated fine root dynamics and production of extramatrical mycorrhizal mycelia (EMM) along four elevational transects reaching from the closed forest to the treeless tundra. In addition, we analysed elevational differences in climate and vegetation structure, and excavated trees to estimate related changes in the partitioning between below- and aboveground biomass...
November 30, 2016: Oecologia
https://www.readbyqxmd.com/read/27904756/ct-negative-mri-gre-positive-primary-motor-cortex-contusion-causing-isolated-foot-drop
#11
Alexander M Tucker, Tianyi Niu, Daniel T Nagasawa, Richard Everson, Shaina Sedighim, Manuel M Buitrago Blanco
BACKGROUND: Isolated acute foot drop due to traumatic brain injury is exceedingly rare and is often misdiagnosed during initial evaluation. Here, we present the case of a patient who presented with left foot drop after falling off a bicycle. CASE DESCRIPTION: The patient is a 55-year-old male who was mountain biking when he fell, hit his head, and lost consciousness. Neurologic examination of the left leg revealed foot drop, no sensory deficits, and 3+ reflexes at the knee and ankle with clonus...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27903052/assessing-spatial-inequalities-in-accessing-community-pharmacies-a-mixed-geographically-weighted-approach
#12
Alexander Domnich, Lucia Arata, Daniela Amicizia, Alessio Signori, Roberto Gasparini, Donatella Panatto
Geographical accessibility is an important determinant for the utilisation of community pharmacies. The present study explored patterns of spatial accessibility with respect to pharmacies in Liguria, Italy, a region with particular geographical and demographic features. Municipal density of pharmacies was proxied as the number of pharmacies per capita and per km2, and spatial autocorrelation analysis was performed to identify spatial clusters. Both non-spatial and spatial models were constructed to predict the study outcome...
November 16, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27902782/correction-shear-wave-elastography-assessments-of-quadriceps-stiffness-changes-prior-to-during-and-after-prolonged-exercise-a-longitudinal-study-during-an-extreme-mountain-ultra-marathon
#13
Pierre Andonian, Magalie Viallon, Caroline Le Goff, Charles de Bourguignon, Charline Tourel, Jérome Morel, Guido Giardini, Laurent Gergelé, Grégoire P Millet, Pierre Croisille
[This corrects the article DOI: 10.1371/journal.pone.0161855.].
2016: PloS One
https://www.readbyqxmd.com/read/27902732/predictors-of-current-and-longer-term-patterns-of-abundance-of-american-pikas-ochotona-princeps-across-a-leading-edge-protected-area
#14
Lucas Moyer-Horner, Erik A Beever, Douglas H Johnson, Mark Biel, Jami Belt
American pikas (Ochotona princeps) have been heralded as indicators of montane-mammal response to contemporary climate change. Pikas no longer occupy the driest and lowest-elevation sites in numerous parts of their geographic range. Conversely, pikas have exhibited higher rates of occupancy and persistence in Rocky Mountain and Sierra Nevada montane 'mainlands'. Research and monitoring efforts on pikas across the western USA have collectively shown the nuance and complexity with which climate will often act on species in diverse topographic and climatic contexts...
2016: PloS One
https://www.readbyqxmd.com/read/27902281/acidicapsa-acidisoli-sp-nov-from-the-acidic-soil-of-a-deciduous-forest
#15
Heizo Matsuo, Chisaki Kudo, Juan Li, Akio Tonouchi
A bacterial strain designated strain SK-11T was isolated from the acidic soil of a deciduous forest in the Shirakami Mountains in Japan. Cells of strain SK-11T were aerobic, non-motile, Gram-stain-negative rods, 0.7-1.0 µm in width and 1.0-1.4 µm in length. The pH range for growth was between 4.0 and 5.5, with an optimum at 5.0. The temperature range for growth was between 10°C and 35°C, with an optimum at around 25-30°C. Strain SK-11T utilized various carbohydrates as growth substrates as well as yeast extract and protein hydrolysates...
November 23, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27902261/paenibacillus-qinlingensis-sp-nov-an-indole-3-acetic%C3%A2-acid-producing-bacterium-isolated-from-roots-of-sinopodophyllum%C3%A2-hexandrum-royle-ying
#16
Kaiyun Xin, Muhang Li, Chaoqiong Chen, Xu Yang, Qiqi Li, Juanli Cheng, Lei Zhang, Xihui Shen
A novel indole-3-acetic acid-producing bacterium, designated TEGT-2T, was isolated from the roots of Sinopodophyllum hexandrum collected from Qinling Mountains in shaanxi province, Northwestern China, and was subjected to a taxonomic study by using a polyphasic approach. Cells of strain TEGT-2T were Gram-stain-positive, strictly aerobic, endospore-forming rods and motile by means of peritrichous flagella. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain TEGT-2T was a member of the genus Paenibacillus, exhibiting the highest sequence similarity to Paenibacillus pectinilyticus KCTC 13222T (97...
November 16, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27901340/effects-of-a-trail-mountain-race-on-neuromuscular-performance-and-hydration-status-in-trained-runners
#17
Ernest Baiget, Javier Peña, Xantal Borràs, Toni Caparrós, José L López, Francesc Marin, Jordi Coma, Eduard Comerma
BACKGROUND: The aims of this study were (a) to examine the effects of a trail mountain race (TMR) on hydration status and neuromuscular performance of recreational trail runners and (b) to determine the relationship among these parameters, subject's characteristics and competitive performance. METHODS: 35 male recreational trail runners (age, 38.1 ± 9.5 years; height, 177.3 ± 5.8 cm; body mass, 73.8 ± 8.4 kg; mean ± SD) were assessed before and after a 21.1 km TMR...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27901296/novel-forest-decline-triggered-by-multiple-interactions-among-climate-an-introduced-pathogen-and-bark-beetles
#18
Carmen M Wong, Lori D Daniels
Novel forest decline is increasing due to global environmental change, yet the causal factors and their interactions remain poorly understood. Using tree ring analyses, we show how climate and multiple biotic factors caused the decline of whitebark pine (Pinus albicaulis) in 16 stands in the southern Canadian Rockies. In our study area, 72% of whitebark pines were dead and 18% had partially dead crowns. Tree mortality peaked in the 1970s; however, the annual basal area increment of disturbed trees began to decline significantly in the late 1940s...
November 5, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27900624/the-sources-of-trace-element-pollution-of-dry-depositions-nearby-a-drinking-water-source
#19
Xinyue Guo, Hongbing Ji, Cai Li, Yang Gao, Huaijian Ding, Lei Tang, Jinguo Feng
Miyun Reservoir is one of the most important drinking water sources for Beijing. Thirteen atmospheric PM sampling sites were established around this reservoir to analyze the mineral composition, morphological characteristics, element concentration, and sources of atmospheric PM pollution, using transmission electron microscope, X-ray diffraction, and inductively coupled plasma mass spectrometry analyses. The average monthly dry deposition flux of aerosols was 15.18 g/m(2), with a range of 5.78-47.56 g/m(2)...
November 29, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27900147/complex-shoulder-girdle-injuries-following-mountain-bike-accidents-and-a-review-of-the-literature
#20
Matthew Alexander Lea, Navnit Makaram, Makaram S Srinivasan
BACKGROUND: Mountain and road bike accidents are particularly common with the increased popularity of the sport. We reviewed the attendances in our emergency department over a 4-year period looking at cycling injuries to detect the level and grade of these injuries and their outcomes. METHOD: Royal Blackburn Hospital caters for a population of 550 000. A search through the Hospital information system revealed 104 patients with fractures following mountain bike injuries...
2016: BMJ Open Sport & Exercise Medicine
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