Long Haozhi
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Wang Yilin
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, 730070, Lanzhou Gansu, China
Liu Guangxiu
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Chen Tuo
State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Zhang Wei
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Wang Yun
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Wu Xiukun
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Tai Xisheng
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Zhang Baogui
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
Sun Likun
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou Gansu, China
ABSTRACT
The variation of the soil physicochemical properties and culturable bacterial community structure along the Qinghai-Tibet Highway (QTP) were studied. The soil Water Content (WC), Total Organic Carbon (TOC) and Total Nitrogen (TN) contents in the Original Land (OL) were higher compared with the corresponding Disturbed Land (DL). The soil pH was neutral to alkaline for almost all of samples and the values for the DL were generally higher. The number of culturable bacteria ranged from 0.25x105 to 1.61x108 and was larger in OL than in DL. A total of 64 isolates was identified and fell into the phyla Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria, with a dominance of Arthrobacter. Interestingly, the effects of disturbance on bacterial phylotype number were more significant in the southern slopes than in the northern slopes of the Tanggula Mountains. Statistical analysis showed that the number of bacteria in a beef extract-peptone medium were affected by TN in OL and influenced by the plant coverage in DL. The number of bacteria in Gause's No. 1 medium had no correlation with any parameters while was affected by the pH in DL and the number of functional bacteria were affected by the vegetation coverage in OL and were affected by the TOC and TN after the disturbance. The bacterial phylotype number in OL was influenced by soil Water Content (WC), whereas the bacterial phylotype number was affected by the plant diversity in DL.
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How to cite this article
Long Haozhi, Wang Yilin, Liu Guangxiu, Chen Tuo, Zhang Wei, Wang Yun, Wu Xiukun, Tai Xisheng, Zhang Baogui and Sun Likun, 2013. Effect of Engineering Disturbance on the Culturable Soil Bacterial Community along the Qinghai-Tibet Highway, China. Information Technology Journal, 12: 6430-6439.
DOI: 10.3923/itj.2013.6430.6439
URL: https://scialert.net/abstract/?doi=itj.2013.6430.6439
DOI: 10.3923/itj.2013.6430.6439
URL: https://scialert.net/abstract/?doi=itj.2013.6430.6439
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