Key laboratory of Ministry of Education for Environment Change and Resources Use in Beibu Gulf, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, 175 East Mingxiu Road, Nanning 530001, Guangxi, People's Republic of China.
Key laboratory of Ministry of Education for Environment Change and Resources Use in Beibu Gulf, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, 175 East Mingxiu Road, Nanning 530001, Guangxi, People's Republic of China; College of Life Science and Technology, Guangxi University, 100 Daxue Road, Nanning 530004, Guangxi, People's Republic of China.
Mar Pollut Bull. 2020 Dec;161(Pt A):111742. doi: 10.1016/j.marpolbul.2020.111742. Epub 2020 Oct 16.
In this study, we investigated the specific bacterial distribution and the response of bacterial communities to shifts in environmental factors in the subtropical Beibu Gulf, southern China. The abundances of Actinobacteria, Bacilli, Planctomycetia, Thermoleophilia, Anaerolineae, and Synechococcophycideae were significantly higher in high eutrophic samples than in medium eutrophic and oligotrophic samples. Bacterial alpha-diversity was found greater in high eutrophication samples than in the other samples. Besides, Ponticaulis koreensis, Nautella italic, Anaerospora hongkongensis, Candidatus Aquiluna rubra, and Roseovarius pacificus were sensitive to trophic variation and thus could be used as eco-markers. In addition, the relative abundances of functional genes involving carbohydrate and amino acid metabolism were very high among the samples. We also found temperature, Chl-a, TDN and NO were the main environmental drivers of bacterial community structure. Overall, this study provides new insight into the composition of bacterial community and function response to gradients of eutrophication in Beibu Gulf.
在这项研究中，我们调查了亚热带北部湾中国南部地区细菌的特定分布和对环境因素变化的细菌群落响应。与中营养和寡营养样品相比，高富营养样品中的放线菌、芽孢杆菌、浮霉菌、嗜热菌、厌氧线菌和蓝藻纲的丰度显著更高。细菌α多样性在高富营养化样品中比其他样品中更大。此外，朝鲜弯杆菌、意大利弯杆菌、香港嗜热厌氧杆菌、红拟球菌和太平洋玫瑰杆菌对营养变化敏感，因此可以作为生态标志物。此外，涉及碳水化合物和氨基酸代谢的功能基因的相对丰度在样品中非常高。我们还发现温度、Chl-a、TDN 和 NO 是细菌群落结构的主要环境驱动因素。总的来说，本研究为北部湾富营养化梯度下细菌群落组成和功能响应提供了新的见解。
