| 冀中地热区深部热水微生物群落组成及其功能预测 |
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| 关键词:microbial community characteristics functional characteristics deep geothermal water geothermal scientific drilling Jizhong geothermal area |
| 基金项目:中国地质调查局地质调查项目(编号: DD20189112);中国地质科学院水文地质环境地质研究所基本科研业务费专项(编号: SK202010) |
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| Composition and Functional Prediction of Microbial Communities in Deep Geothermal Water from Jizhong (Central Hebei) Geothermal Area |
| The understanding of the composition and functions of deep microbial communities is of great significance for exploring the origin of early lives and utilizing their unique functions. The composition and functions of microbial communities in deep carbonate karst-fissure geothermal storage environment remain unclear. In order to explore the composition and prediction of the functions of microbial communities in the deep geothermal water from the deep carbonate rock karst-fissure geothermal storage environment, the authors, taking shallow water and soil as the references, collected deep geothermal water samples by the pumping tests using the geothermal scientific drilling holes located in Jizhong geothermal area and also collected shallow water samples from farm irrigation wells and soil samples near the top of each drill hole, respectively for 16S rRNA gene high-throughput sequencing and functional predictions using PICRUSt. The results show that there exist 38 phyla and 541 genera in the deep geothermal water of Jizhong geothermal area, of which bacteria are dominant (97.5%), whereas archaea are rare (2.5%), and characteristic microbial communities comprise mainly Firmicutes, Nitrospirae, Thermotogae and Euryarchaeota. The dominant bacterial genera include sulfate-reducing bacteria. Carbon fixation, fermentation and sulfate reduction might be relatively strong, whereas methanogenesis and denitrification might be weak in the deep geothermal water. Aerobic, mesophilic bacteria occurring in the deep geothermal water indicate that the deep geothermal water is recharged by the shallow water rich in proteobacteria under the condition of large flow pumping. This study has revealed that the deep carbonate rock karst-fracture geothermal reservoirs contain abundant microbial communities with various functions in Jizhong geothermal area, and that the characteristics of microbial communities can be used as indicators of the hydraulic connection between deep geothermal water and shallow water. |
| ZHAO Jia-yi,ZHEN Shi-jun,ZHANG Cui-yun,YIN Mi-ying,ZHANG Sheng.2021.Composition and Functional Prediction of Microbial Communities in Deep Geothermal Water from Jizhong (Central Hebei) Geothermal Area[J].Acta Geoscientica Sinica,42(5):605-616. |
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