Characterizing Free-Living and Particle-Attached Bacterial Communities of a Shallow Lake on the Inner Mongolia-Xinjiang Plateau, China

Author:

Wang Yanjun12,Shi Xiaohong134,Zhao Shengnan13,Sun Biao13,Liu Yu1,Li Wenbao1,Yu Haifeng1,Tian Zhiqiang15,Guo Xin1,Shi Yujiao1,Cui Zhimou1,Zhang Hao1

Affiliation:

1. Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China

2. Vocational and Technical College, Inner Mongolia Agricultural University, Baotou 014109, China

3. Inner Mongolia Water Resource Protection and Utilization Key Laboratory, Hohhot 010018, China

4. State Gauge and Research Station of Wetland Ecosystem, Wuliangsuhaihai Lake, Inner Mongolia, Bayannur 014404, China

5. Department of Civil Engineering, Hetao College, Bayannur 015000, China

Abstract

Bacteria play a critical role in the material and energy-cycling processes of lake ecosystems. To understand the characteristics of the bacterial community in Wuliangsuhai Lake in spring, we explored the influence of environmental factors on the community structure of particle-attached bacteria (PA) and free-living bacteria (FL) in the water column of Wuliangsuhai Lake. In this study, we analyzed the bacterial community characteristics of 10 sampling sites in Wuliangsuhai Lake in April 2019 based on the high-throughput sequencing of 16S rRNA genes. Redundancy analysis (RDA) was used to analyze the influence of environmental factors on bacterial communities in lake water. The results showed the following: (1) The relative abundance of bacteria in Wuliangsuhai Lake did not significantly differ among the 10 sampling sites, and the dominant bacterial phyla were Actinobacteria, Proteobacteria, and Bacteroidetes. In addition, the community diversity of particle-attached (PA) was higher than that of free-living (FL). (2) The relative abundance of Bacteroidetes in PA (28.83%~54.67%) was significantly higher than that of FL (10.56%~28.44%), the relative abundance of Actinobacteria in the number of PA (20.02%~61.61%) was lower than that of FL (8.18%~16.71%), and the relative abundance of Verrucomicrobia in the PA (0.55%~13.11%) was higher than that of FL (0.05%~6.31%). (3) The redundancy analysis (RDA) showed that transparency, total nitrogen, total phosphorus, and NH4+-N were the main factors influencing the dominant bacterial communities in Wuliangsuhai Lake. This study provides the basis for further research on bacterial communities in freshwater lakes and may help local governments in the management of the water resources of Wuliangsuhai Lake.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Inner Mongolia Autonomous Region Science and Technology Plan

Scientific Research Projects of Higher Education Institutions in Inner Mongolia Autonomous Region

Publisher

MDPI AG

Subject

Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry

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