Abstract

The results of field and experimental microbiological studies of water, soil, and rock samples in the influence zone of large landslide are presented. The landslide occurred in December 2018 and blocked the Bureya Reservoir from coast to coast. An artificial channel was created to restore the hydrological regime with the use of TNT (trinitrotoluene) and RDX (hexogen). A comparative analysis of the abundance of cultivated heterotrophic bacteria around the landslide body and in the artificial channel is carried out. The activity of microbial communities in relation to easily available (peptone, lactate, and starch) and difficult-to-mineralize humic compounds is also determined. With the use of spectrometry and gas chromatography, it is shown that an increase in the diversity of aromatic compounds in water is accompanied by an increase in the abundance of heterotrophic bacteria. A number of toxic substances, including methanol and methylated benzene derivatives, are found among the dominant components in the water. Its concentrations increased after the water drained through the landslide body and after imploding works. Many of the volatile organic compounds may have been products of microbial metabolism when water interacts with rocks. A hypothesis on the role of methanotrophic and methylotrophic bacteria in the genesis of methanol and toluene is discussed.

中文翻译：

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布列雅水库大型滑坡影响区微生物丰度和活动的变化

摘要

介绍了大型滑坡影响区水、土壤和岩石样品的现场和实验微生物研究结果。山体滑坡发生在 2018 年 12 月，从海岸到海岸封锁了布列亚水库。使用 TNT（三硝基甲苯）和 RDX（己烯）创建了一条人工通道以恢复水文状况。对滑坡体周围和人工通道内培养的异养细菌丰度进行了比较分析。还确定了与容易获得的（蛋白胨、乳酸盐和淀粉）和难以矿化的腐殖质化合物相关的微生物群落的活动。随着光谱法和气相色谱法的使用，结果表明，水中芳香族化合物多样性的增加伴随着异养细菌丰度的增加。在水中的主要成分中发现了许多有毒物质，包括甲醇和甲基苯衍生物。水通过滑坡体排出和内爆工程后，其浓度增加。许多挥发性有机化合物可能是水与岩石相互作用时微生物代谢的产物。讨论了关于甲烷营养菌和甲基营养菌在甲醇和甲苯的形成中的作用的假设。水通过滑坡体排出和内爆工程后，其浓度增加。许多挥发性有机化合物可能是水与岩石相互作用时微生物代谢的产物。讨论了关于甲烷营养菌和甲基营养菌在甲醇和甲苯的形成中的作用的假设。水通过滑坡体排出和内爆工程后，其浓度增加。许多挥发性有机化合物可能是水与岩石相互作用时微生物代谢的产物。讨论了关于甲烷营养菌和甲基营养菌在甲醇和甲苯的形成中的作用的假设。