Consistent responses of soil microbial taxonomic and functional attributes to mercury pollution across China.
Consistent responses of soil microbial taxonomic and functional attributes to mercury pollution across China.
复制标题
中国土壤微生物分类和功能属性对汞污染的一致响应
DOI：
10.1186/s40168-018-0572-7
复制
发表时间：
2018-10-18
期刊：
影响因子：
15.5
通讯作者：
He JZ
中科院分区：
文献类型：
--
作者：
Liu YR;Delgado-Baquerizo M;Bi L;Zhu J;He JZ
汞（Hg）污染的生态后果的主要污染物之一，世界各地的微生物分类和功能属性仍然知之甚少，很大程度上未被探索。本文以中国两个典型汞污染区的土壤为研究对象，评价了汞污染对土壤细菌丰度、多样性和共生网络的调节作用。我们还调查了汞含量和微生物功能基因的相对丰度之间的关联，通过分析这些网站的一个子集的土壤宏基因组。我们发现，土壤汞在很大程度上影响了两个研究区域的微生物群落的分类和功能属性。总的来说，汞污染与细菌丰度呈负相关，但在两个不同的区域，细菌的多样性呈正相关。我们还发现了一些一致的土壤汞含量和细菌群落组成之间的关联。例如，土壤总汞含量与稻田和高地土壤中厚壁菌门和拟杆菌门的相对丰度呈正相关。而甲基汞（MeHg）含量与两种土壤中硝螺环磷的相对丰度呈负相关。土壤汞污染的增加与两个地区的共生网络内的细菌群落的生态集群的相对丰度的急剧变化。利用宏基因组数据，我们还能够检测汞污染对与关键土壤过程相关的多个功能基因的影响，如元素循环和汞转化（例如，甲基化和还原）。总之，我们的研究提供了坚实的证据表明，汞污染对多种分类和功能属性，包括细菌丰度，多样性，生态集群和功能基因的相对丰度具有可预测的和显着的影响。我们的研究结果表明，与人类活动有关的土壤汞污染的增加将导致汞影响地区的分类和功能属性发生可预测的变化，对农业生态系统和其他地方的可持续管理产生潜在影响。本文的在线版本（10.1186/s40168-018-0572-7）包含补充材料，可供授权用户使用。
The ecological consequences of mercury (Hg) pollution—one of the major pollutants worldwide—on microbial taxonomic and functional attributes remain poorly understood and largely unexplored. Using soils from two typical Hg-impacted regions across China, here, we evaluated the role of Hg pollution in regulating bacterial abundance, diversity, and co-occurrence network. We also investigated the associations between Hg contents and the relative abundance of microbial functional genes by analyzing the soil metagenomes from a subset of those sites. We found that soil Hg largely influenced the taxonomic and functional attributes of microbial communities in the two studied regions. In general, Hg pollution was negatively related to bacterial abundance, but positively related to the diversity of bacteria in two separate regions. We also found some consistent associations between soil Hg contents and the community composition of bacteria. For example, soil total Hg content was positively related to the relative abundance of Firmicutes and Bacteroidetes in both paddy and upland soils. In contrast, the methylmercury (MeHg) concentration was negatively correlated to the relative abundance of Nitrospirae in the two types of soils. Increases in soil Hg pollution correlated with drastic changes in the relative abundance of ecological clusters within the co-occurrence network of bacterial communities for the two regions. Using metagenomic data, we were also able to detect the effect of Hg pollution on multiple functional genes relevant to key soil processes such as element cycles and Hg transformations (e.g., methylation and reduction). Together, our study provides solid evidence that Hg pollution has predictable and significant effects on multiple taxonomic and functional attributes including bacterial abundance, diversity, and the relative abundance of ecological clusters and functional genes. Our results suggest an increase in soil Hg pollution linked to human activities will lead to predictable shifts in the taxonomic and functional attributes in the Hg-impacted areas, with potential implications for sustainable management of agricultural ecosystems and elsewhere. The online version of this article (10.1186/s40168-018-0572-7) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
4.8
作者：
Delgado-Baquerizo, Manuel;Reith, Frank;Bissett, Andrew
通讯作者：
Bissett, Andrew
影响因子：
5.2
作者：
Barberán A;Casamayor EO;Fierer N
通讯作者：
Fierer N
中国贵州省汞矿区人类通过摄入大米接触甲基汞。
影响因子：
11.4
作者：
Feng, Xinbin;Li, Ping;Fu, Xuewu
通讯作者：
Fu, Xuewu
影响因子：
9.7
作者：
Frey, Beat;Rieder, Stephan R.
通讯作者：
Rieder, Stephan R.
影响因子：
2.3
作者：
Das, Suvendu;Jean, Jiin-Shuh;Liu, Chia-Chuan
通讯作者：
Liu, Chia-Chuan