Exploring the impacts of physicochemical characteristics and heavy metals fractions on bacterial communities in four rivers.
Exploring the impacts of physicochemical characteristics and heavy metals fractions on bacterial communities in four rivers.
复制标题
探索理化特征和重金属组分对四条河流细菌群落的影响。
DOI：
10.1016/j.jenvman.2022.116453
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发表时间：
2023
影响因子：
8.7
通讯作者：
Gupta S
中科院分区：
文献类型：
--
作者：
Gupta S
沉积物中的重金属污染对在沉积物生态地球化学过程中起关键作用的细菌群落构成严重威胁。然而，影响沉积物细菌群落的物理化学因素和主要重金属形态尚不清楚。在这里，我们进行了热图和冗余分析，以研究物理化学特性和重金属组分对英国（泰恩河和乌斯伯恩河）和印度（恒河和亚穆纳河）河流沉积物细菌群落的影响。结果表明，理化性质和重金属形态改变了细菌群落的多样性，丰富度和结构。此外，钴，锌，铅，铬，铜的部分发挥了重要作用，在塑造细菌群落结构，和物理化学变量，特别是NH 4 +-N和NO2−-N，也影响细菌的多样性和结构。厚壁菌与理化因子和重金属组分均表现出较强的相关性。绿弯杆菌和放线菌可以作为锌污染的生物标志物。总之，我们的研究确定了沉积物的化学特征和重金属组分在确定细菌群落结构以及金属污染场地的生物修复和环境管理中的重要性。
Heavy metals contamination in sediment poses serious threats to bacterial communities that play critical roles in sediment biogeochemical processes. However, the physicochemical factors and the major heavy metals fractions that affect sediment bacterial communities are still unclear. Here, we performed heatmap and redundancy analyses to examine the effects of physico-chemical characteristics and heavy metals fractions on the sediment bacterial community from rivers in the UK (River Tyne and Ouseburn) and India (River Ganga and Yamuna). The results revealed that physicochemical characteristics and heavy metals fractions altered the diversity, richness, and structures of the bacterial community. Moreover, the fractions of Co, Zn, Pb, Cr, and Cu played significant roles in shaping the bacterial community structure, and physicochemical variables, particularly NH4+-N and NO2−-N, also influenced the bacterial diversity and structure. Firmicutes showed strong associations with both physicochemical factors and heavy metals fractions. Chloroflexi and Actinobacteriota can be used as biomarkers for Zn contamination. Overall, our study identified the significance of sediment chemical characteristics and heavy metals fractions in determining the bacterial community structure as well as bioremediation and environmental management of metals contaminated sites.