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https://www.readbyqxmd.com/read/28733592/machine-learning-model-analysis-of-breeding-habitats-for-the-black-necked-crane-in-central-asian-uplands-under-anthropogenic-pressures
#1
Xuesong Han, Yumin Guo, Chunrong Mi, Falk Huettmann, Lijia Wen
The black-necked crane (Grus nigricollis) is the only alpine crane species and is endemic to the Tibetan Plateau. The breeding habitats of this species are poorly understood, which greatly hampers practical research and conservation work. Using machine learning methods and the best-available data from our 7,000-kilometer mega-transect survey and open access data, we built the first species distribution model (SDM) to analyze the black-necked crane's breeding habitats. Our model showed that current conservation gaps account for 26...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28732294/soil-bacterial-community-response-to-vegetation-succession-after-fencing-in-the-grassland-of-china
#2
Quanchao Zeng, Shaoshan An, Yang Liu
Natural succession is an important process in terrestrial system, playing an important role in enhancing soil quality and plant diversity. Soil bacteria is the linkage between soil and plant, has an important role in aboveground community dynamics and ecosystem functioning in terrestrial ecosystems, driving the decomposition of soil organic matter and plant litter. However, the role of soil bacteria in the secondary succession has not been well understood, particularly in the degraded soil of Loess Plateau...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28731986/the-effect-of-sex-on-heart-rate-variability-at-high-altitude
#3
Christopher John Boos, Emma Vincent, Adrian Mellor, John O'Hara, Caroline Newman, Richard Cruttenden, Phylip Scott, Mark Cooke, Jamie Matu, David Richard Woods
There is evidence to suggest that high altitude (HA) exposure leads to a fall in heart rate variability (HRV) that is linked to the development of acute mountain sickness (AMS). The effects of sex on changes in HRV at HA and its relationship to AMS are unknown. METHODS: HRV (5-minute single lead ECG) was measured in 63 healthy adults (41 men and 22 women) aged 18-56 years at sea level (SL) and during a HA trek at 3619m, 4600m and 5140m respectively. The main effects of altitude (SL, 3619, 4600 and 5140m) and sex (men vs women) and their potential interaction were assessed using a Factorial Repeated Measures ANOVA...
July 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28730814/persistent-urban-influence-on-surface-water-quality-via-impacted-groundwater
#4
Rachel S Gabor, Steven J Hall, David Eiriksson, Yusuf Jameel, Mallory Millington, Trinity Stout, Michelle L Barnes, Andrew Gelderloos, Hyrum Tennant, Gabriel J Bowen, Bethany T Neilson, Paul D Brooks
Growing urban environments stress hydrologic systems and impact downstream water quality. We examined a third-order catchment that transitions from an undisturbed mountain environment into urban Salt Lake City, Utah. We performed synoptic surveys during a range of seasonal baseflow conditions and utilized multiple lines of evidence to identify mechanisms by which urbanization impacts water quality. Surface water chemistry did not change appreciably until several kilometers into the urban environment, where concentrations of solutes such as chloride and nitrate increase quickly in a gaining reach...
July 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28729863/effects-of-physiochemical-factors-on-prokaryotic-biodiversity-in-malaysian-circumneutral-hot-springs
#5
Chia S Chan, Kok-Gan Chan, Robson Ee, Kar-Wai Hong, María S Urbieta, Edgardo R Donati, Mohd S Shamsir, Kian M Goh
Malaysia has a great number of hot springs, especially along the flank of the Banjaran Titiwangsa mountain range. Biological studies of the Malaysian hot springs are rare because of the lack of comprehensive information on their microbial communities. In this study, we report a cultivation-independent census to describe microbial communities in six hot springs. The Ulu Slim (US), Sungai Klah (SK), Dusun Tua (DT), Sungai Serai (SS), Semenyih (SE), and Ayer Hangat (AH) hot springs exhibit circumneutral pH with temperatures ranging from 43°C to 90°C...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28728120/cadmium-and-high-temperature-effects-on-brain-and-behaviour-of-lymantria-dispar-l-caterpillars-originating-from-polluted-and-less-polluted-forests
#6
Vesna Perić-Mataruga, Branka Petković, Larisa Ilijin, Marija Mrdaković, Slađana Dronjak Čučaković, Dajana Todorović, Milena Vlahović
Insects brain as a part of nervous system is the first-line of fast stress response that integrate stress signals to regulate all aspects of insect physiology and behaviour. The cadmium (Cd) bioaccumulation factor (BF), activity of the neurotoxicity biomarker acetylcholinesterase (AChE), dopamine content, expression and amount of Hsp70 in the brain and locomotor activity were evaluated in the 4th instar of Lymantria dispar L. caterpillars fed a Cd supplemented diet and reared in an optimal temperature regime (23 °C) and/or exposed to high temperature (28 °C)...
July 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28727966/mountain-climbing-in-the-dark-introduction-to-the-special-symposium-on-the-future-direction-of-psychological-science
#7
Robert J Sternberg
This special symposium in Perspectives on Psychological Science answers the question, "Do you believe the field of psychological science is headed in the right direction?" Respondents are a sampling of Association for Psychological Science award winners over the past 5 years dating back from publication of this symposium.
July 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28727222/spatiotemporal-pattern-of-gross-primary-productivity-and-its-covariation-with-climate-in-china-over-the-last-thirty-years
#8
Yitong Yao, Xuhui Wang, Yue Li, Tao Wang, Miaogen Shen, Mingyuan Du, Honglin He, Yingnian Li, Weijun Luo, Mingguo Ma, Yaoming Ma, Yanhong Tang, Huimin Wang, Xianzhou Zhang, Yiping Zhang, Liang Zhao, Guangsheng Zhou, Shilong Piao
The uncertainties of China's GPP estimates by global data-oriented products and ecosystem models justify a development of high-resolution data-oriented GPP dataset over China. We applied a machine learning algorithm developing a new GPP dataset for China with 0.1° spatial resolution and monthly temporal frequency based on eddy flux measurements from 40 sites in China and surrounding countries, most of which have not been explored in previous global GPP datasets. According to our estimates, mean annual GPP over China is 6...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28725397/genetic-diversity-and-phylogeography-of-siberian-roe-deer-caproulus-pygargus-in-central-and-peripheral-populations
#9
Yun Sun Lee, Nickolay Markov, Alexander Argunov, Inna Voloshina, Damdingiin Bayarlkhagva, Baek-Jun Kim, Mi-Sook Min, Hang Lee, Kyung Seok Kim
Current understanding of phylogeographical structure and genetic diversity of Siberian roe deer remains limited mainly due to small sample size and/or low geographical coverage in previous studies. Published data suggest at least two phylogroups: western (Ural Mountains and Western Siberia) and eastern (east from lake Baikal, including the Korean peninsula), but their phylogenetic relationship remains unclear. Combined sequences of cytochrome b (1140 bp) and the mtDNA control region (963 bp) were analyzed from 219 Siberian roe deer from 12 locations in Russia, Mongolia, and South Korea, which cover a large part of its range, to assess genetic diversity and phylogeographical status...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28725380/from-the-ground-up-biotic-and-abiotic-features-that-set-the-course-from-genes-to-ecosystems
#10
Craig W Benkman, Sierra Jech, Matthew V Talluto
Spatial variation in cone serotiny in Rocky Mountain lodgepole pine (Pinus contorta ssp. latifolia) across Yellowstone National Park influences initial pine recruitment after stand-replacing fire with tremendous population, community, and ecosystem consequences. A previous study showed that much of the spatial variation in serotiny results from the balance of selection arising from high frequencies of fire favoring serotiny countered by opposing selection exerted by American red squirrels (Tamiasciurus hudsonicus) as seed predators...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28725374/snowbeds-are-more-affected-than-other-subalpine-alpine-plant-communities-by-climate-change-in-the-swiss-alps
#11
Magalì Matteodo, Klaus Ammann, Eric Pascal Verrecchia, Pascal Vittoz
While the upward shift of plant species has been observed on many alpine and nival summits, the reaction of the subalpine and lower alpine plant communities to the current warming and lower snow precipitation has been little investigated so far. To this aim, 63 old, exhaustive plant inventories, distributed along a subalpine-alpine elevation gradient of the Swiss Alps and covering different plant community types (acidic and calcareous grasslands; windy ridges; snowbeds), were revisited after 25-50 years. Old and recent inventories were compared in terms of species diversity with Simpson diversity and Bray-Curtis dissimilarity indices, and in terms of community composition with principal component analysis...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28725017/stoichiometry-of-natural-bacterial-assemblages-from-lakes-located-across-an-elevational-gradient
#12
Birgit Stenzel, Carina Rofner, Maria Teresa Pérez, Ruben Sommaruga
Heterotrophic bacteria are thought to be phosphorus-rich organisms with relatively homeostatic stoichiometry, but the elemental composition of natural bacterial communities has rarely been assessed. Here we tested whether bacterial stoichiometry changes with the trophic status of lakes by assessing the elemental composition of the bacterial-dominated (hereafter microbial) fraction together with that of the dissolved and seston fractions in 11 lakes situated along an elevational gradient. The stoichiometry of these three size-fractions was analyzed during the thermal stratification and mixing periods in composite water samples and in the water layer of the deep chlorophyll-a maximum...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722752/application-of-a-sensory-instrumental-tool-to-study-apple-texture-characteristics-shaped-by-altitude-and-time-of-harvest
#13
Mathilde Charles, Maria Laura Corollaro, Luigi Manfrini, Isabella Endrizzi, Eugenio Aprea, Angelo Zanella, Luca Corelli Grappadelli, Flavia Gasperi
BACKGROUND: Texture is important in the preferences of apple consumers. Of the pre-harvest factors affecting fruit quality and especially texture, altitude and subsequent climatic conditions are crucial, determining differences in the physiological mechanisms of fruit growth, ripening stage and chemical composition, as demonstrated by several studies. This work applies a detailed sensory-instrumental protocol developed in a previous paper(1) to investigate the impact of altitude, time of harvest and their cross-effect on sensory characteristics of apple, with a focus on texture...
July 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28722620/case-report-infectious-diseases-in-pilgrims-visiting-the-holy-land
#14
Orna Nitzan, Arnon Blum, Esther Marva, Adina Katz, Bat-Sheva Tzadok, Yaarit Nachum-Biala, Gad Baneth, Avi Peretz
Every year Christian pilgrims from around the world visit the holy sites located around the Sea of Galilee. Some become ill during their stay with infectious diseases that were acquired in their country of origin, and are hospitalized at Poriya Medical Center. They pose a diagnostic challenge due to language barriers, the rarity of these infections in Israel, and the fact that diagnostic tests are not readily available. All patient records from 2015 of Holy Land tourists hospitalized at Poriya Medical Center were screened for the diagnosis of imported zoonotic diseases that are not commonly diagnosed in Israel...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722584/rocky-mountain-spotted-fever-and-pregnancy-four-cases-from-sonora-mexico
#15
Jesus David Licona-Enriquez, Jesus Delgado-de la Mora, Christopher D Paddock, Carlos Arturo Ramirez-Rodriguez, María Del Carmen Candia-Plata, Gerardo Álvarez Hernández
We present a series of four pregnant women with Rocky Mountain spotted fever (RMSF) that occurred in Sonora, Mexico, during 2015-2016. Confirmatory diagnoses were made by polymerase chain reaction or serological reactivity to antigens of Rickettsia rickettsii by using an indirect immunofluorescence antibody assay. Each patient presented with fever and petechial rash and was treated successfully with doxycycline. Each of the women and one full-term infant delivered at 36 weeks gestation survived the infection...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722181/historical-biome-distribution-and-recent-human-disturbance-shape-the-diversity-of-arbuscular-mycorrhizal-fungi
#16
Meelis Pärtel, Maarja Öpik, Mari Moora, Leho Tedersoo, Robert Szava-Kovats, Søren Rosendahl, Matthias C Rillig, Ylva Lekberg, Holger Kreft, Thorunn Helgason, Ove Eriksson, John Davison, Francesco de Bello, Tancredi Caruso, Martin Zobel
The availability of global microbial diversity data, collected using standardized metabarcoding techniques, makes microorganisms promising models for investigating the role of regional and local factors in driving biodiversity. Here we modelled the global diversity of symbiotic arbuscular mycorrhizal (AM) fungi using currently available data on AM fungal molecular diversity (small subunit (SSU) ribosomal RNA (rRNA) gene sequences) in field samples. To differentiate between regional and local effects, we estimated species pools (sets of potentially suitable taxa) for each site, which are expected to reflect regional processes...
July 19, 2017: New Phytologist
https://www.readbyqxmd.com/read/28721188/trait-variation-along-elevation-gradients-in-a-dominant-woody-shrub-is-population-specific-and-driven-by-plasticity
#17
Alix A Pfennigwerth, Joseph K Bailey, Jennifer A Schweitzer
Elevation gradients are frequently used as space-for-time substitutions to infer species' trait responses to climate change. However, studies rarely investigate whether trait responses to elevation are widespread or population-specific within a species, and the relative genetic and plastic contributions to such trait responses may not be well understood. Here, we examine plant trait variation in the dominant woody shrub, Rhododendron maximum, along elevation gradients in three populations in the South Central Appalachian Mountains, USA, in both field and common garden environments...
July 2017: AoB Plants
https://www.readbyqxmd.com/read/28720395/acetazolamide-and-n-acetylcysteine-in-the-treatment-of-chronic-mountain-sickness-monge-s-disease
#18
Shailendra Sharma, Jane Gralla, Joyce Gonzalez Ordonez, Maria-Elena Hurtado, Erik R Swenson, Robert B Schoene, Jackeline Pando Kelly, David Callacondo, Christopher Rivard, Carlos Roncal-Jimenez, Jeffrey Sirota, Richard Fuquay, Brian P Jackson, Kai E Swenson, Richard J Johnson, Abdias Hurtado, Elizabeth Escudero
Patients suffering from chronic mountain sickness (CMS) have excessive erythrocytosis. Low -level cobalt toxicity as a likely contributor has been demonstrated in some subjects. We performed a randomized, placebo controlled clinical trial in Cerro de Pasco, Peru (4380m), where 84 participants with a hematocrit (HCT) ≥65% and CMS score>6, were assigned to four treatment groups of placebo, acetazolamide (ACZ, which stimulates respiration), N-acetylcysteine (NAC, an antioxidant that chelates cobalt) and combination of ACZ and NAC for 6 weeks...
July 15, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28720110/molecular-characterisation-of-protist-parasites-in-human-habituated-mountain-gorillas-gorilla-beringei-beringei-humans-and-livestock-from-bwindi-impenetrable-national-park-uganda
#19
Matthew J Nolan, Melisa Unger, Yuen-Ting Yeap, Emma Rogers, Ilary Millet, Kimberley Harman, Mark Fox, Gladys Kalema-Zikusoka, Damer P Blake
BACKGROUND: Over 60 % of human emerging infectious diseases are zoonotic, and there is growing evidence of the zooanthroponotic transmission of diseases from humans to livestock and wildlife species, with major implications for public health, economics, and conservation. Zooanthroponoses are of relevance to critically endangered species; amongst these is the mountain gorilla (Gorilla beringei beringei) of Uganda. Here, we assess the occurrence of Cryptosporidium, Cyclospora, Giardia, and Entamoeba infecting mountain gorillas in the Bwindi Impenetrable National Park (BINP), Uganda, using molecular methods...
July 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28718202/patterns-of-mortality-in-a-montane-mixed-conifer-forest-in-san-diego-county-california
#20
Mary Pyott Freeman, Douglas A Stow, Li An
We examine spatial patterns of conifer tree mortality and their changes over time for the montane mixed-conifer forests of San Diego County. These forest areas have recently experienced extensive tree mortality due to multiple factors. A spatial contextual image processing approach was utilized with high spatial resolution digital airborne imagery to map dead trees for the years 1997, 2000, 2002, and 2005 for three study areas: Palomar, Volcan, and Laguna mountains. Plot-based fieldwork was conducted to further assess mortality patterns...
July 17, 2017: Ecological Applications: a Publication of the Ecological Society of America
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