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Su-Jin Lu, Jian-Huan Si, Chuan-Ying Hou, Yu-Si Li, Meng-Meng Wang, Xiao-Xia Yan, Meng Xie, Jin-Xu Sun, Bai-Jie Chen, Shu-Sen Li
To provide a theoretical basis for alpine source lake protection, ten samples were taken from each lake annually from 2012 to 2015. Each year, the various species of nitrogen and phosphorus nutrients were measured. The average contents of nitrate nitrogen, ammonia nitrogen, nitrite nitrogen, total phosphorus, and total nitrogen in the four lakes are 0.195-0.0 mg/L, 0.038-0.143 mg/L, 0.004-0.168 mg/L, 0.006-0.740 mg/L, and 0.050-0.547 mg/L, respectively. The total phosphorus contents in Eling Lake, Longbao Lake and Sea Star were higher than Class I water quality standards, and the total nitrogen contents in Eling Lake, Sea Star and Zhaling Lake were higher than Class I water quality standards as well...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Juan Li, Dajun Wang, Hang Yin, Duojie Zhaxi, Zhala Jiagong, George B Schaller, Charudutt Mishra, Thomas M McCarthy, Hao Wang, Lan Wu, Lingyun Xiao, Lamao Basang, Yuguang Zhang, Yunyun Zhou, Zhi Lu
The snow leopard (Panthera uncia) inhabits the rugged mountains in 12 countries of Central Asia, including the Tibetan Plateau. Due to poaching, decreased abundance of prey, and habitat degradation, it was listed as endangered by the International Union for Conservation of Nature in 1972. Current conservation strategies, including nature reserves and incentive programs, have limited capacities to protect snow leopards. We investigated the role of Tibetan Buddhist monasteries in snow leopard conservation in the Sanjiangyuan region in China's Qinghai Province on the Tibetan Plateau...
February 2014: Conservation Biology: the Journal of the Society for Conservation Biology
Zhi-Zhen Qi, Chao Li, Li Wang, Hai-Hong Zhao, Xiao-Yan Yang, Cun-Xiang Li, Jian He, Rong-Jie Wei
OBJECTIVE: To study the biological characteristics of Yersinia pestis and to develop prevention and control program on plague in Sanjiangyuan areas, Qinghai province. METHODS: To identify the biologic types and molecular biological features of Y.pestis isolated in Sanjiangyuan area from 1954-2007. RESULTS: Among the 411 strains of Y. pestis, 12 strains belonged to the microtus type Y. pestis with denitrification (-) and donkey-hide gelatin carbohydrate (-) and glycerine (+)...
January 2009: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
Chao-feng Lin, Zhan-quan Chen, Quan-hong Xue, Hang-xian Lai, Lai-sheng Chen, Deng-shan Zhang
Sanjiangyuan region (the headstream of three rivers) in Qinghai Province of China is the highest and largest inland alpine wetland in the world. The study on the nutrient contents and microbial populations of aeolian sandy soils in this region showed that soil organic matter content increased with the evolution of aeolian sand dunes from un-stabilized to stabilized state, being 5.9 and 3.8 times higher in stabilized sand dune than in mobile and semi-stabilized sand dunes, respectively. Soil nitrogen and phosphorus contents increased in line with the amount of organic matter, while potassium content and pH value varied slightly...
January 2007: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Peter M Foggin, Marion E Torrance, Drashi Dorje, Wenzha Xuri, J Marc Foggin, Jane Torrance
The health status of Tibetan herders in the Sanjiangyuan region of the Tibetan Plateau, in southwest Qinghai Province, is assessed in this paper. The field study was conducted in 2002 in the context of a broader community development and research framework, the ultimate goal of which is to achieve an effective region-specific programme of preventative health care and training for Tibetan pastoralists. Specifically, the authors analysed the impact of a number of potentially health-related environmental and lifestyle risk factors on self-reported health indicators, with a special emphasis on mother and child health...
November 2006: Social Science & Medicine
Yuguang Zhang, Diqiang Li, Huimin Wang, Qiming Xiao, Xueduan Liu
To understand the composition and structure of nitrogen-fixing bacterial communities from the Sanjiangyuan Nature Reserve on the Tibetan Plateau, the molecular diversity of nifH genes from soil obtained at six sites was examined using a PCR-based cloning approach. Six samples were collected from different regions at an altitude of 3907-4824 m above sea level, and a principal component analysis (PCA) showed that they had different biogeochemical properties. A total of 446 clones and 162 unique RFLP patterns were found...
July 2006: FEMS Microbiology Letters
Yu-guang Zhang, Hui-min Wang, Di-qiang Li, Qi-ming Xiao, Xue-duan Liu
Research on the diversity of microorganism community in natural environment has been concerned hot spot using the newly molecular biotechnology in the world now. This was the first description of the molecular diversity and phylogenetic analysis of nitrogen-fixing (nifH) genes in alp prairie soil of Sanjiangyuan natural reserve. DNA was directly extracted from the soil microorganism and amplified the nifH gene fragment using PCR by the primers of nifH-34F 5'-AAAGG(C/T)GG(A/T) ATCGG(C/T)AA(A/G) TCCACCAC-3' and nifH-491R 5'-TYGTT(G/C)GC(G/C)GC(A/G)TACAT(G/C)G CCATCAT-3'...
April 2005: Wei Sheng Wu Xue Bao, Acta Microbiologica Sinica
Yu-guang Zhang, Hui-min Wang, Di-qiang Li, Qi-ming Xiao, Xue-duan Liu
Research on the diversity of microorganism community in natural environment has been concerned hot spot using the newly molecular biotechnology in the world now. To understand the composition and structure of nitrogen-fixing bacteria communities in the Qingzang plateau, the molecular diversity and phylogenetic of nifH genes of Sangjiangyuan natural reserve were examined by using the PCR-RFLP based cloning approach. The 3 samples were come from different sites and different plant types, and their biogeochemical parameters were diverse...
June 2005: Wei Sheng Wu Xue Bao, Acta Microbiologica Sinica
Youjun He, Guofa Cui, Zongwei Feng, Jie Zheng, Jiansheng Dong, Yongbo Li
Based on field survey, information collection and experts consultation, the quantitative grading index system and assessment standards for preference conservation of rare and endangered plant species of forest-meadow ecotone in Sanjiangyuan Nature Reserve were established by using the methods and principles of systematical analysis. The quantitative grading index system included endangered coefficient, genetic coefficient, and useful value coefficient. In addition, 10 indicators used to evaluate endangered grading and conservation priorities sequenc, were also included in 3 subsystems respectively...
August 2004: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
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