Quantitative characteristics of microorganisms in permafrost
at different depths and their relation to soil
physicochemical properties |
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| Authors: | Wei Zhang XiaoPei Dong GuangXiu Liu GaoSen Zhang XiuKun Wu XiSheng Tai HaoZhi Long and BaoGui Zhang |
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| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;School of Life Science, Lanzhou University, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China |
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| Abstract: | Microorganisms in permafrost can live in cold environments due to coadapted physicochemical processes in this environment. In
this paper, the relation between microbial number and soil physicochemical properties at the headwaters area of the Urumqi River
is analyzed by using fluorescence microscopy counting and oligo-culture techniques. In total, 20 samples from a 200-cm permafrost
core were used as study materials. The study reveals that the number of culturable bacteria has a significantly positive correlation
with soil water content, total carbon and total nitrogen concentrations, and a significantly negative correlation with soil pH
value. In addition, the ratio of culturable bacteria to total cell number decreases with depths. The results demonstrate that the
number of culturable bacteria in permafrost is closely correlated with soil physicochemical properties and depositional age. |
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| Keywords: | microorganisms in permafrost culturable bacteria physicochemical properties correlation |
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