文献类型： 外文期刊

作者： Wang, Nan ¹ ; Ding, Dongsheng ⁴ ; Zhang, Huihui ¹ ; Ding, Xiaokun ¹ ; Zhang, Di ¹ ; Yao, Chenghao ⁵ ; Fan, Xiao ⁴ ; Ding, Renye ⁴ ; Wang, Hualong ² ; Jiang, Tao ¹ ;

作者机构： 1.Yantai Univ, Sch Ocean, Yantai 264005, Peoples R China

2.Ocean Univ China, Inst Evolut & Marine Biodivers, Coll Marine Life Sci, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266003, Peoples R China

3.Ocean Univ China, Key Lab Polar Oceanog & Global Ocean Change, Qingdao 266003, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Marine Fisheries, Minist Agr & Rural Affairs, Qingdao 266071, Peoples R China

5.Shandong Hongxin Environm Protect Technol Co Ltd, Yantai, Peoples R China

关键词： Bacterial community structures; High-throughput sequencing; Fishing harbours; The bohai economic circle

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：7.7； 五年影响因子：7.5 ）

ISSN： 0013-9351

年卷期： 2024 年 259 卷

页码：

收录情况： SCI

摘要： This study aimed to elucidate the effects of coastal environmental stress on the composition of sediment bacterial communities and their cooccurrence patterns in fishing harbors around the Bohai Economic Circle, China. Compared with the natural sea area, fishing harbors contained higher levels of organic pollution (organic pollution index = 0.12 +/- 0.026) and considerably reduced bacterial richness and evenness. The distributions of sediment microbial communities clustered along the pollutant concentration gradients across fishing harbors. Betaproteobacteria dominated (76%) organically polluted fishing harbors, which were mostly disturbed by anthropogenic activities. However, the harbors also revealed the absence of numerous pathogenic (Coxiella and Legionella) and photosynthetic (Synechococcus and Leptolyngbya) bacteria. Abundant genera, including Thiobacillus and Arenimonas, exhibited a positive correlation with total phosphorus and a negative correlation with total nitrogen in sediments. Meanwhile, Sulfurovum, Psychrobacter, and Woeseia showed the opposite trend. Pollutant accumulation and anthropogenic activities caused the decrease in the sediment microbial diversity and dispersal ability and promoted convergent evolution. Severely polluted harbors with simplified cooccurrence networks revealed the presence of destabilized microbial communities. In addition, the modularity of bacterial networks decreased with organic pollution. Our results provide important insights into the adjustment mechanism of microbial communities to community organization and functions under environmental pollution stress. Overall, this study enhanced our understanding of how microbial communities in coastal sediments adapted and survived amidst anthropogenic activities like oily effluent discharges from large ships, wash water, domestic sewage, garbage, and fisheries wastes. It also examined their resilience to future contamination.