Spatial distribution and functional profile of the bacterial community in response to eutrophication in the subtropical Beibu Gulf, China

Nan Li; Xing Chen; Huaxian Zhao; Jinli Tang; Gonglingxia Jiang; Zhuoting Li; Xiaoli Li; Si Chen; Shuqi Zou; Ke Dong; Qiangsheng Xu

doi:10.1016/j.marpolbul.2020.111742

Spatial distribution and functional profile of the bacterial community in response to eutrophication in the subtropical Beibu Gulf, China

Mar Pollut Bull. 2020 Dec;161(Pt A):111742. doi: 10.1016/j.marpolbul.2020.111742. Epub 2020 Oct 16.

Authors

Nan Li¹, Xing Chen², Huaxian Zhao¹, Jinli Tang¹, Gonglingxia Jiang¹, Zhuoting Li¹, Xiaoli Li¹, Si Chen³, Shuqi Zou⁴, Ke Dong⁴, Qiangsheng Xu⁵

Affiliations

¹ 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.
² 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.
³ College of Life Science and Technology, Guangxi University, 100 Daxue Road, Nanning 530004, Guangxi, People's Republic of China.
⁴ Department of biological sciences, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227, South Korea.
⁵ 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. Electronic address: qiangshengxu@163.com.

PMID: 33075697
DOI: 10.1016/j.marpolbul.2020.111742

Abstract

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 NO₃^- 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.

Keywords: 16S rRNA; Bacterial communities; Beibu Gulf; Distribution; Diversity; Eutrophication.

MeSH terms

Alphaproteobacteria
China
Eutrophication*
Firmicutes
Rhodobacteraceae

Supplementary concepts

Anaerospora hongkongensis
Ponticaulis koreensis
Roseovarius pacificus