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https://www.readbyqxmd.com/read/28938020/seasonal-variations-in-carbon-nitrogen-and-phosphorus-concentrations-and-c-n-p-stoichiometry-in-different-organs-of-a-larix-principis-rupprechtii-mayr-plantation-in-the-qinling-mountains-china
#1
Hailiang Li, M James C Crabbe, Fuli Xu, Weiling Wang, Lihui Ma, Ruilong Niu, Xing Gao, Xingxing Li, Pei Zhang, Xin Ma, Haikui Chen
Understanding how concentrations of elements and their stoichiometry change with plant growth and age is critical for predicting plant community responses to environmental change. We used long-term field experiments to explore how the leaf, stem and root carbon (C), nitrogen (N) and phosphorous (P) concentrations and their stoichiometry changed with growth and stand age in a L. principis-rupprechtii Mayr. plantation from 2012-2015 in the Qinling Mountains, China. Our results showed that the C, N and P concentrations and stoichiometric ratios in different tissues of larch stands were affected by stand age, organ type and sampling month and displayed multiple correlations with increased stand age in different growing seasons...
2017: PloS One
https://www.readbyqxmd.com/read/28937808/hybridization-associated-with-cycles-of-ecological-succession-in-a-passerine-bird
#2
Renée A Duckworth, Georgy A Semenov
Identifying the diversity of contexts that can lead to hybridization is important for understanding its prevalence and dynamics in natural populations. Despite the potential of ecological succession to dramatically alter species co-occurrence and abundances, it is unknown whether it directly promotes hybridization and, if so, has long-lasting consequences. Here, we summarize 30 years of survey data across 10 populations to show that in western and mountain bluebirds, heterospecific pairing occurs during repeatable and transient colonization events at the early stages of species turnover...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28935851/comparative-analysis-of-the-microbial-communities-in-raw-milk-produced-in-different-regions-of-korea
#3
In Seon Kim, Yoo Kyung Hur, Eun Ji Kim, Young-Tae Ahn, Jong Geun Kim, Yun-Jaie Choi, Chul Sung Huh
Objective: The control of psychrotrophic bacteria bringing about the milk spoilage and the illness by toxic compounds is an important issue in the dairy industry. In South Korea, Gangwon-do province is one of the coldest mountain terrain in which eighty percent of the areas are mountainous regions, and mainly play an important role in agriculture and dairy industry. The purposes of this study were to analyze the indigenous microbiota of raw milk in Gangwon-do and accurately investigate a putative microbial group causing milk quality to be deteriorated...
September 21, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28933926/law-enforcement-and-gun-retailers-as-partners-for-safely-storing-guns-to-prevent-suicide-a-study-in-8-mountain-west-states
#4
Carol W Runyan, Ashley Brooks-Russell, Sara Brandspigel, Marian Betz, Gregory Tung, Douglas Novins, Robert Agans
OBJECTIVES: To examine the extent to which law enforcement agencies (LEAs) and gun retailers are willing to offer voluntary, temporary storage as a part of an overall suicide prevention effort. METHODS: We invited all LEAs and gun retailers in 8 US states to respond to questionnaires asking about their willingness to offer temporary gun storage and their recommendations to gun owners about safe storage. RESULTS: We collected data in 2016 from 448 LEAs and 95 retailers (response rates of 53% and 25%, respectively)...
September 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28932955/the-sustainable-arable-land-use-pattern-under-the-tradeoff-of-agricultural-production-economic-development-and-ecological-protection-an-analysis-of-dongting-lake-basin-china
#5
Guanyi Yin, Liming Liu, Xilong Jiang
To find a solution regarding sustainable arable land use pattern in the important grain-producing area during the rapid urbanization process, this study combined agricultural production, locational condition, and ecological protection to determine optimal arable land use. Dongting Lake basin, one of the major grain producing areas in China, was chosen as the study area. The analysis of land use transition, the calculation of arable land barycenter, the landscape indices of arable land patches, and the comprehensive evaluation of arable land quality(productivity, economic location, and ecological condition) were adopted in this study...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28931132/oxygen-saturation-increases-over-the-course-of-the-night-in-mountaineers-at-high-altitude-3050-6354-m
#6
Markus Tannheimer, Rianne van der Spek, Florian Brenner, Raimund Lechner, Jürgen M Steinacker, Gunnar Treff
Background: Blood oxygen saturation (SpO 2 ) is frequently measured to determine acclimatization status in high-altitude travellers. However, little is known about nocturnal time course of SpO 2 (SpO 2N ), but alterations in SpO 2N might be practically relevant as well. To this end, we describe the time-course of SpO 2N in mountaineers at high altitude. Methods: SpO 2N was continuously measured in ten male mountaineers during a three-week expedition in Peru (3,050-6,354m)...
September 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28931016/insight-into-central-asian-flora-from-the-cenozoic-tianshan-montane-origin-and-radiation-of-lagochilus-lamiaceae
#7
Ming-Li Zhang, Xiao-Qing Zeng, Stewart C Sanderson, Vyacheslav V Byalt, Alexander P Sukhorukov
The Tianshan Mountains play a significant role in the Central Asian flora and vegetation. Lagochilus has a distribution concentration in Tianshan Mountains and Central Asia. To investigate generic spatiotemporal evolution, we sampled most Lagochilus species and sequenced six cpDNA locations (rps16, psbA-trnH, matK, trnL-trnF, psbB-psbH, psbK-psbI). We employed BEAST Bayesian inference for dating, and S-DIVA, DEC, and BBM for ancestral area/biome reconstruction. Our results clearly show that the Tianshan Mountains, especially the western Ili-Kirghizia Tianshan, as well as Sunggar and Kaschgar, was the ancestral area...
2017: PloS One
https://www.readbyqxmd.com/read/28930006/fatal-rocky-mountain-spotted-fever-along-the-united-states-mexico-border-2013-2016
#8
Naomi A Drexler, Hayley Yaglom, Mariana Casal, Maria Fierro, Paula Kriner, Brian Murphy, Anne Kjemtrup, Christopher D Paddock
Rocky Mountain spotted fever (RMSF) is an emerging public health concern near the US-Mexico border, where it has resulted in thousands of cases and hundreds of deaths in the past decade. We identified 4 patients who had acquired RMSF in northern Mexico and subsequently died at US healthcare facilities. Two patients sought care in Mexico before being admitted to US-based hospitals. All patients initially had several nonspecific signs and symptoms, including fever, headache, nausea, vomiting, or myalgia, but deteriorated rapidly without receipt of a tetracycline-class antimicrobial drug...
October 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28929581/gain-of-function-mutation-in-ptpn11-in-histiocytic-sarcomas-of-bernese-mountain-dogs
#9
T Thaiwong, S Sirivisoot, M Takada, V Yuzbasiyan-Gurkan, M Kiupel
Histiocytic sarcoma (HS) is an aggressive malignant neoplasm of dendritic cell origin that is common in certain breeds of dogs. High prevalence of fatal, disseminated HS has been described in Bernese Mountain Dogs (BMDs). Support for genetic predisposition to develop HS has been presented in several studies, but to date, causative genetic events have not been reported. In addition, no driver mutations have been identified in tumours. Recently, E76K gain-of-function mutation in SHP2 encoded by the PTPN11 gene has been described in human histiocytic malignancies...
September 20, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28929088/microbial-invasion-vs-tick-immune-regulation
#10
REVIEW
Daniel E Sonenshine, Kevin R Macaluso
Ticks transmit a greater variety of pathogenic agents that cause disease in humans and animals than any other haematophagous arthropod, including Lyme disease, Rocky Mountain spotted fever, human granulocytic anaplasmosis, babesiosis, tick-borne encephalitis, Crimean Congo haemorhagic fever, and many others (Gulia-Nuss et al., 2016). Although diverse explanations have been proposed to explain their remarkable vectorial capacity, among the most important are their blood feeding habit, their long term off-host survival, the diverse array of bioactive molecules that disrupt the host's natural hemostatic mechanisms, facilitate blood flow, pain inhibitors, and minimize inflammation to prevent immune rejection (Hajdušek et al...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28929025/the-distribution-shifts-of-pinus-armandii-and-its-response-to-temperature-and-precipitation-in-china
#11
Xiaofeng Zheng, Pengxiang Gao, ShuoXin Zhang
BACKGROUND: The changing climate, particularly in regard to temperature and precipitation, is already affecting tree species' distributions. Pinus armandii, which dominates on the Yungui Plateau and in the Qinba Mountains in China, is of economic, cultural and ecological value. We wish to test the correlations between the distribution shift of P. armandii and changing climate, and figure out how it tracks future climate change. METHODS: We sampled the surface soil at sites throughout the distribution of P...
2017: PeerJ
https://www.readbyqxmd.com/read/28928001/the-potential-use-of-unmanned-aircraft-systems-drones-in-mountain-search-and-rescue-operations
#12
Yunus Karaca, Mustafa Cicek, Ozgur Tatli, Aynur Sahin, Sinan Pasli, Muhammed Fatih Beser, Suleyman Turedi
OBJECTIVE: This study explores the potential use of drones in searching for and locating victims and of motorized transportation of search and rescue providers in a mountain environment using a simulation model. METHODS: This prospective randomized simulation study was performed in order to compare two different search and rescue techniques in searching for an unconscious victim on snow-covered ground. In the control arm, the Classical Line Search Technique (CLT) was used, in which the search is performed on foot and the victim is reached on foot...
September 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28927548/pulmonary-injury-from-waterproofing-spray-during-a-hike
#13
Tomonori Harada, Yukio Hirabayashi, Yuriko Takayama-Isagawa, Hiroto Sakamoto, Makoto Kawaishi, Hiroyuki Hara, Shin Aizawa
A 48-year-old man developed general fatigue, dyspnea, and fever at an altitude of 1562 m from the morning of the first day of a 3-day hike. Despite pharyngeal discomfort and mild general fatigue, he felt that the symptoms were not sufficient to abandon his plan. He usually required 1.5 hours to reach Tokusawa (6.4 km from the starting point at an altitude of 1500 m), but this time he required 2.5 hours and slept briefly upon arrival at Tokusawa due to extreme fatigue and respiratory discomfort. His symptoms became aggravated, so he presented at a mountain clinic with oxygen saturation at 80% and body temperature of 37...
September 15, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28927469/genetic-diversity-of-haemonchus-contortus-isolated-from-sympatric-wild-blue-sheep-pseudois-nayaur-and-sheep-in-helan-mountains-china
#14
Dong-Dong Shen, Ji-Fei Wang, Dan-Yu Zhang, Zhi-Wei Peng, Tian-Yun Yang, Zhao-Ding Wang, Dwight D Bowman, Zhi-Jun Hou, Zhen-Sheng Liu
BACKGROUND: Haemonchus contortus is known among parasitic nematodes as one of the major veterinary pathogens of small ruminants and results in great economic losses worldwide. Human activities, such as the sympatric grazing of wild with domestic animals, may place susceptible wildlife hosts at risk of increased prevalence and infection intensity with this common small ruminant parasite. Studies on phylogenetic factors of H. contortus should assist in defining the amount of the impact of anthropogenic factors on the extent of sharing of agents such as this nematode between domestic animals and wildlife...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28926642/a-late-holocene-pollen-record-from-proglacial-oblong-tarn-mount-kenya
#15
Colin J Courtney Mustaphi, Konrad Gajewski, Rob Marchant, Gunhild Rosqvist
High-elevation ecosystems, such as those on Mount Kenya are undergoing significant changes, with accelerated glacial ice losses over the twentieth century creating new space for alpine plants to establish. These ecosystems respond rapidly to climatic variability and within decades of glacial retreat, Afroalpine pioneering taxa stabilize barren land and facilitate soil development, promoting complex patches of alpine vegetation. Periglacial lake sediment records can be used to examine centennial and millennial scale variations in alpine and montane vegetation compositions...
2017: PloS One
https://www.readbyqxmd.com/read/28925156/-plant-metabolomics-approach-for-age-discrimination-of-mountain-cultivated-ginseng-using-uplc-q-tof-ms
#16
Xiang-Wei Chang, Bo-Ran Wang, Tong Wang, De-Kun Li, Ying Zhao, Yu-Ling Zhang, Da-Zheng Zhou, Zheng-Liang Ye
Growth year is one of the important factors for the quality of mountain cultivated ginseng (MCG). For age differentiation of MCG, rhizome extracts of ginseng aged from 11 to 15 years were analyzed using a non-targeted approach with ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS)-based on plant metabolomics technique. Multivariate statistical methods such as principal component analysis (PCA) and orthogonal partial least squared discrimination analysis (OPLS-DA) were used to compare the derived patterns among the samples...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28924497/phylogeographic-investigation-and-ecological-niche-modelling-of-the-endemic-frog-species-nanorana-pleskei-revealed-multiple-refugia-in-the-eastern-tibetan-plateau
#17
Bin Wang, Feng Xie, Jiannan Li, Gang Wang, Cheng Li, Jianping Jiang
The largest plateau Tibetan Plateau supplied an excellent opportunity to investigate the influence of the Pleistocene events on the high-elevation species. To test for the alternative hypotheses of Pleistocene glacial refugia, we used partial sequences of two mitochondrial genes and one nuclear gene to examine the phylogeographic patterns of the endemic frog species Nanorana pleskei across its known range in the eastern Tibetan Plateau, and conducted species distribution modelling (SDM) to explore changes of its distribution range through current and paleo periods...
2017: PeerJ
https://www.readbyqxmd.com/read/28922899/the-current-status-of-the-distribution-range-of-the-western-pine-beetle-dendroctonus-brevicomis-curculionidae-solytinae-in-northern-mexico
#18
O Valerio-Mendoza, F Armendáriz-Toledano, G Cuéllar-Rodríguez, José F Negrón, G Zúñiga
The distribution range of the western pine beetle Dendroctonus brevicomis LeConte (Coleoptera: Curculionidae) is supported only by scattered records in the northern parts of Mexico, suggesting that its populations may be marginal and rare in this region. In this study, we review the geographical distribution of D. brevicomis in northern Mexico and perform a geometric morphometric analysis of seminal rod shape to evaluate its reliability for identifying this species with respect to other members of the Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae) complex...
September 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28922878/development-and-validation-of-a-mobile-device-based-external-ventricular-drain-simulator
#19
Peter J Morone, Kimon Bekelis, Brandon K Root, Robert J Singer
BACKGROUND: Multiple external ventricular drain (EVD) simulators have been created, yet their cost, bulky size, and nonreusable components limit their accessibility to residency programs. OBJECTIVE: To create and validate an animated EVD simulator that is accessible on a mobile device. METHODS: We developed a mobile-based EVD simulator that is compatible with iOS (Apple Inc., Cupertino, California) and Android-based devices (Google, Mountain View, California) and can be downloaded from the Apple App and Google Play Store...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28920837/bacillus-solisilvae-sp-nov-isolated-from-forest-soil
#20
Tong Pan, Hairong He, Xiaochong Wang, Yibo Shen, Junwei Zhao, Kai Yan, Xiangjing Wang, Chongxi Liu, Ji Zhang, Wensheng Xiang
A novel Gram-stain-positive, motile, endospore-forming, rod-shaped bacterial strain, NEAU-cbsb5T, was isolated from forest soil from Changbai Mountain, Heilongjiang Province, China. The isolate grew at 15-40 °C (optimum 30 °C), at pH 6.0-8.0 (optimum pH 7.0) and in the presence of up to 4 % (w/v) NaCl, although NaCl was not required for growth. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain NEAU-cbsb5T formed a distinct lineage within the genus Bacillus and was most closely related to Bacillus acidiceler DSM 18954T (99...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
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