黄河内蒙段开河期细菌群落结构特征研究

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Abstract In order to explore the bacterial community composition and ecological network structure in the water-soil medium at the beginning of the opening of the Inner Mongolia section of the Yellow River, sampling was carried out in mid-April, 2021, a total of 6 water samples and 4soil samples were obtained from the Yellow River. The samples were measured by 16S rRNA high-throughput sequencing, which analyzed the bacterial community composition of the water and soil samples at the level of phylum and genus. The results showed that: the distribution of soil bacterial community structure was more dispersed than that of water, the abundance, uniformity and diversity of bacterial communities in soil samples were higher than those in water. There were significant inter-group differences in diversity between the two. At the phylum level, Proteobacteria, Actinobacteria and Acidobacteriota were the dominant bacterial phyla in water and soil samples, and the mean relative abundance of Proteobacteria in river was about 36.57%, while that in soil decreased to 25.39%; Acidobacteriota was mainly present in soil with a relative abundance of about 14.17%. At the genus level, hgcI_clade (6.19%~12.75%),CL500-29_marine_group (2.97%~5.05%) and Acinetobacter(0.74%~12.24%) were the dominant genera in water, while norank_f__norank_o__norank_c__KD4-96(1.95%~4.91%), norank_f__norank_o__Vicinamibacterales (2.35%~ 4.67%), and norank_f__ Gemmatimonadaceae (2.20%~4.73%) were the dominant genera in soil. The response of different genera to the community structure of soil and water bacteria was not consistent, among which belonged to the phylum Acidobacteriota and Gemmatimonadota were the main genera linking the soil and water bacterial community, respectively, while hgcI_clade and CL500-29_marine_group belonging to Actinobacteria were the main genera causing the difference of the dominant phylum of soil and water. Although soil had a larger ecological network structure than water, and Delftia, Candidatus_Methylopumilus,Arthrobacter and Rb41 were the key genera that maintained the ecological network structure of the soil-water medium in the Inner Yellow River, the ecological functions of different modules in the network structure of the water were more consistent comparing to soil.

Key words： bacterial community water-soil medium network Structure river opening period Inner Mongolia section of the Yellow River

Received: 22 July 2023

PACS:

X172

Corresponding Authors: 李文宝,教授,tianshiTD@126.com E-mail: tianshiTD@126.com

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	SHI Yu-jiao
	LI Wen-bao
	GUO Xin

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SHI Yu-jiao,LI Wen-bao,GUO Xin. Characterization of bacterial community structure during the opening period of the Yellow River in Inner Mongolia[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1487-1496.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1487

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