Response of microbial communities to different organochlorine pesticides (OCPs) contamination levels in contaminated soils.
Response of microbial communities to different organochlorine pesticides (OCPs) contamination levels in contaminated soils.
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DOI：
10.1016/j.chemosphere.2018.09.160
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发表时间：
2019-01
期刊：
影响因子：
8.8
通讯作者：
Guangdong Sun;Yu Du;Junxiang Yin;Yunzhong Jiang;Dayi Zhang;Bo Jiang;Guang-he Li;Hao Wang
中科院分区：
文献类型：
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作者：
Guangdong Sun;Yu Du;Junxiang Yin;Yunzhong Jiang;Dayi Zhang;Bo Jiang;Guang-he Li;Hao Wang
了解污染土壤微生物群落结构和多样性有助于优化生物修复策略和效果。研究了环境变量和有机氯农药（OCPs）污染水平对废弃农药厂区微生物群落结构的影响。在不同理化性质和OCPs水平的土壤中共鉴定出28个细菌门。变形菌门（Proteobacteria）、拟杆菌门（bacteriidetes）和厚壁菌门（firmicutes）为优势菌系，分别占总数的60.2% ~ 69.2%、5.6% ~ 9.7%和6.7% ~ 9.4%。在系统发育多样性和系统型丰富度方面，总体微生物多样性与土壤中六氯环己烷（HCHs）和二氯二苯三氯乙烷（DDTs）含量以及全氮、溶解有机碳、pH和植被等土壤性质相关。多变量回归树（MRT）分析显示，植被对土壤微生物多样性的影响显著，占总变异的31.8%，其次是OCPs水平（28.3%）、总氮（12.4%）、溶解有机碳（6.3%）和pH（2.4%）。本研究结果为OCPs污染和其他环境变量对土壤微生物群落的影响提供了新的见解和启示，并为OCPs污染场地的管理提供了潜在的战略性生物修复措施。
Understanding microbial community structure and diversity in contaminated soils helps optimize the bioremediation strategies and performance. This study investigated the roles of environmental variables and contamination levels of organochlorine pesticides (OCPs) in shaping microbial community structure at an abandoned aged insecticide plant site. In total, 28 bacterial phyla were identified across soils with different physiochemical properties and OCPs levels.Proteobacteria,BacterioidetesandFirmicutesrepresented the dominant lineages, and accounted for 60.2%–69.2%, 5.6%–9.7% and 6.7%–9.4% of the total population, respectively. The overall microbial diversities, in terms of phylogenetic diversity and phylotype richness, were correlated with the contents of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in soils, as well as other soil properties including total nitrogen, dissolved organic carbon, pH and vegetation. The multivariate regression tree (MRT) analysis revealed that the soil microbial diversity was significantly impacted by vegetation, which explained 31.8% of the total variation, followed by OCPs level (28.3%), total nitrogen (12.4%), dissolved organic carbon (6.3%) and pH (2.4%). Our findings provide new insights and implications into the impacts on soil microbial community by OCPs contamination and other environmental variables, and offer potential strategic bioremediation for the management of OCPs contaminated sites.