Unveiling Soil Microbiome Adaptation and Survival Strategy Under Vanadium Stress in Nationwide Mining Environments

作者：Han Zhang, Shuo Jiao, Yi Xing, Bo Jiang, Shungui Zhou, Baogang Zhang · 发表于：Journal of Geophysical Research Biogeosciences · 年份：2024 · DOI：10.1029/2023jg007655 · 被引用次数：30 · 研究领域：Vanadium and Halogenation Chemistry、Fluoride Effects and Removal、Metal Extraction and Bioleaching

Abstract In the soils of vanadium (V) smelters, a diverse array of microorganisms relies on metabolic activities for survival amid stress. However, the characteristics and functions of soil microbiomes in V mining environments remain unexplored on a continental scale. This study thoroughly investigates the microbial diversity, community assembly, and functional potential of soil microbiome across 90 V smelters in China. Alpha diversity decreases significantly along the V gradient, with V emerging as the primary factor influencing community structure, followed by other environmental, climatic, and geographic factors. The null model reveals that V induces homogeneous selection, shaping co‐occurrence patterns and leading to increased number of positive associations, particularly with keystone genera such as f_Gemmatimonadaceae , Nocardioides , Micromonospora , and Rubrobacter under higher V concentrations (>559.6 mg/kg). Moreover, a metagenomic analysis yields 67 metagenome‐assembled genomes, unraveling the potential metabolic pathways of keystone taxa and their likely involvement in the V(V) reduction process. Nitrate and nitrite reductase ( nirK , narG ), and mtrABC are found to be taxonomically affiliated with Micromonospora . sp, FEN‐1250 . sp, Nocardioides . sp, etc. Additionally, the reverse citric acid cycle (rTCA) likely serves as the primary carbon fixation pathway, synthesizing alternative energy for putative V reducers, highlighting a potentially synergistic relati...