Responses of soil fungal and archaeal communities to environmental factors in an ongoing antimony mine area.
Responses of soil fungal and archaeal communities to environmental factors in an ongoing antimony mine area.
复制标题
DOI：
10.1016/j.scitotenv.2018.10.300
复制
发表时间：
2019-02
期刊：
影响因子：
--
通讯作者：
Ningning Wang;Aihua Wang;Jun Xie;M. He
中科院分区：
文献类型：
--
作者：
Ningning Wang;Aihua Wang;Jun Xie;M. He
微生物对地球化学循环至关重要。然而，重金属污染与改变微生物群落有关。土壤中的锑（Sb）和砷（As）可改变土壤细菌群落组成，因此，可能会影响土壤真菌和古菌群落组成。本研究的目的是评估长期锑和砷污染地区的微生物活性和真菌和古菌群落组成。土壤呼吸速率在247.91 ~ 1372.93 μ gC/kgSDWh范围内，与锑浓度呈正相关（r = 0.79）。微生物多样性指数（Shannon和Simpson指数）表明，真菌和古菌群落的丰度对砷更敏感。Redemption分析（RDA）显示，土壤特性和污染是控制真菌和古菌群落的驱动因素。所有这两个微生物组强烈响应pH值。然而，真菌和古菌群落组成的主导驱动程序是非常不同的。真菌群落组成受pH、TC、TSb、RI和SbDGT的影响较大，而古菌群落组成主要受pH、AsDGT和TAs的影响。土壤呼吸与真菌群落组成呈极强的相关性，r2= 0，60，p < 0.01。这些结果表明，由于不同的微生物类群的限制环境条件的Sb和As的污染梯度的微生物的反应是异质性的。
Microorganisms are vital to biogeochemical cycles. However, heavy metal contamination has been implicated in altering the microbial community. Antimony (Sb) and arsenic (As) in soils can alter soil bacterial community composition in previous studies and, therefore, may have effects on soil fungal and archaeal community composition. The aim of this study was to assess the microbial activity and fungal and archaeal community composition in long-term Sb and As contamination areas. We analyzed soil respiration rates from 247.91 μg C/kg SDW h to 1372.93 μg C/kg SDW h, which revealed a positive correlation with concentrations of antimony (r = 0.79). The microbial diversity indices (Shannon and Simpson indices) showed that the abundances of the fungal and archaeal communities were more sensitive to As. Redundancy analysis (RDA) revealed that soil properties and contamination are drivers controlling the fungal and archaeal community. All of these two microbial groups responded strongly to pH. However, the dominant drivers for fungal and archaeal community composition were very different. These differences were related to limiting conditions for different species, with fungal community composition affected strongly by pH, TC, TSb, RI and SbDGT, while archaeal community composition was mainly affected by the pH, AsDGTand TAs. Furthermore, soil respiration showed a very strong relationship with fungal community composition with r2= 0,60, p < 0.01. These results showed that microbial responses to contamination gradients of Sb and As were heterogeneous due to the limiting environmental conditions of different microbial taxa.