文献类型：期刊文献

英文题名：Soil microbial community dynamics indicate disruption of nitrogen cycling by pollution in vegetation buffer zones

作者：Chen, Zhu[1] Liu, Hong-yan[2] Rao, Chen[2] Jiang, Chang[2] Tan, Yue-chen[3] Yu, Tu[1] Yu, En-jiang[2] Wu, Pan[2]

第一作者：Chen, Zhu

通信作者：Liu, HY[1]

机构：[1]Guizhou Univ, Coll Agr, Guiyang 550025, Peoples R China;[2]Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Peoples R China;[3]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China

年份：2021

卷号：85-86

外文期刊名：PEDOBIOLOGIA

收录：;Scopus(收录号：2-s2.0-85101630100);WOS:【SCI-EXPANDED(收录号:WOS:000651616100010)】；

基金：We would like to thank LetPub (www.letpub.com) for providing linguistic assistance during the preparation of this manuscript. This work was supported by the National Key Research and Development Program of China [2018YFC1802602], the Joint Projects of the National Natural Science Foundation and the Karst Research Centre of Science in Guizhou Province, China [U1612442], the National Natural Science Foundation of China [31860115], the Key Laboratory of Education Department of Guizhou Province, China [qianjiaohe[2016]001], the Major Project in Guizhou Province [qiankeheJzhongdazi[2015]2001], the Guizhou Provincial Biology First-Class Subject Construction Project [GNYL(2017)009], and the Development Project of Young Science and Technology Talents in Guizhou Provincial Department of Education [qianjiaoheKY[2018]100].

语种：英文

外文关键词：Vegetation buffer zone; Network analysis; Positive feedback; cyanobacterial; algal blooms

摘要：Hongfeng Lake is one of the largest artificial freshwater lakes on the Karst plateau of China, and the control of external nutrient input into the lake by a vegetation buffer zone is key to mitigating its eutrophication. Although soil microbial communities play key roles in nitrogen pollutant interception and in maintaining ecosystem stability, few studies have investigated these communities in lake vegetation buffer zone soils. In this study, the effects of seasonal and human disturbances on soil microbial communities of the vegetation buffer zones of Hongfeng Lake were determined by high-throughput sequencing and community profiling. BIOENV analysis revealed that soil redox potential was the primary factor associated with soil microbial community composition during the wet season, while Total nitrogen better explained variation in the dry season microbial communities. The relative abundances of Cyanobacteria were significantly higher in vegetation buffer zone soils that were polluted by upstream livestock and domestic sewage. Further, analysis of microbial community network topological features indicated that the soil microbial communities of the vegetation buffer zone markedly differed between wet and dry seasons. Specifically, wet season community networks suggested that the proliferation of Cyanobacteria, E. coli, and Panaeolus papilionaceus inhibited the growth of microorganisms capable of nitrification and denitrification, thereby contributing to increased risk of nitrogen loss to surface waters. Based on these results, we suggest that discharge of domestic sewage and livestock wastewater should be prohibited along Hongfeng Lake tributaries. Moreover, vegetation should be artificially managed to improve the mitigation of non-point source pollution into the lake via vegetation buffer zones.