Nutrients and heavy metals mediate the distribution of microbial community in the marine sediments of the Bohai Sea, China.
Nutrients and heavy metals mediate the distribution of microbial community in the marine sediments of the Bohai Sea, China.
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DOI：
10.1016/j.envpol.2019.113069
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发表时间：
2019-12
影响因子：
8.9
通讯作者：
Meiqing Lu;Xin Luo;J. Jiao;Hailong Li;Xuejing Wang;Jing-yan Gao;Xiaolang Zhang;Kai Xiao
中科院分区：
文献类型：
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作者：
Meiqing Lu;Xin Luo;J. Jiao;Hailong Li;Xuejing Wang;Jing-yan Gao;Xiaolang Zhang;Kai Xiao
渤海是我国最大的边缘海之一，受人类活动和工业活动的影响十分广泛。人类活动产生的污染物负荷已引起严重的生态问题。对渤海湾和莱州湾海水和沉积物的理化特征进行了研究。利用16 S rRNA基因扩增测序技术分析了沉积物中微生物群落的多样性和组成。测序结果显示，样品中有16门31纲，变形菌为优势菌门，其中γ-、δ-和ε-为优势亚门。氮，磷，硫循环相关的微生物在这两个海湾呈现高丰度。有机物代谢是影响渤海湾微生物群落分布的主要因素，而黄河来水是影响莱州湾微生物群落分布的主导因素。硫氧化过程预计将积极影响重金属，而氨（NH 4+）氧化过程是容易受到重金属的负面影响。莱州湾近海沉积物中的微生物群落与渤海湾大部分沉积物中的微生物群落受相似的主导控制因子的控制。这一现象可能归因于海洋环流。研究结果可为渤海及其他地区边缘海生态系统管理提供指导。
The Bohai Sea, one of the largest marginal seas in China, is extensively influenced by human and industrial activities. The pollutant loads from anthropogenic activities have induced severe ecological problems. The study investigates the physicochemical characteristics of seawater and sediments in Bohai Bay and Laizhou Bay of the Bohai Sea. The diversity and composition of microbial community in sediments are analyzed by 16S rRNA gene amplicon sequencing. The sequencing results present 16 phyla and 31 classes from the samples.Proteobacteriaconstituted a dominant phylum, of which the classes ofGamma-,Delta-, andEpsilon-are predominant sub-divisions. Nitrogen, phosphorus, and sulfur cycling related microbes present high abundance in both bays. The metabolism of organic matters is the main factor that influences the distribution of microbial communities in Bohai Bay, while the inflow of Yellow River is the dominant factor that influences the distribution of microbial communities in Laizhou Bay. Sulfur oxidizing process is expected to be positively influenced by heavy metals, while ammonia (NH4+) oxidizing process is prone to be negatively affected by heavy metals in both bays. Microbial communities in the offshore sediments of Laizhou Bay and the majority microbial communities in Bohai Bay sediments are subject to similar predominant controlling factors. This phenomenon is likely ascribed to ocean circulation. The results of this study can provide constructive guidelines on ecosystem management of marginal seas in Bohai and elsewhere.