天山乌鲁木齐河源1号冰川表层雪微生物多样性分析

doi:10.13866/j.azr.2023.04.16

Abstract

Abstract:

To examine the characteristics of microbial communities in the surface snow samples from the Glacier No. 1 at the headwaters of Urumqi River, Tianshan Mountains (henceforth referred to as “Urumqi Glacier No. 1”) and their relationship with climate and environment, surface snow samples were collected at an altitude of 3549 m in the spring (April, TSX1), and 3770 m (TSX2) and 3800 m (TSX3) in the summer (June) in the region in 2021. The V3-V4 region of 16S rDNA of bacteria, the V4-V5 region of 16S rDNA of archaea, and the ITS2 region of fungi were amplified by polymerase chain reaction (PCR). The products were then subjected to high-throughput sequencing, after which the microbial diversity was analyzed. The results showed that the microbial diversity of the surface snow samples from the Urumqi Glacier No. 1 differed in spring and summer, with the bacterial diversity being higher in spring and lower in summer, while the fungal diversity showed the opposite pattern. Proteobacteria (58.13%-89.10%) and Bacteroidetes (4.24%-40.74%) were the dominant bacteria at the phylum level, while Flavobacterium (2.32%-33.64%) and Polaromonas (0.01%-24.72%) were the dominant bacteria at the genus level. Thaumarchaeota (38.10%-97.55%) was the dominant archaea in the three samples, followed by Nanoarchaeaeota (0%-61.90%) and Euryarchaeota (0%-2.82%). Ascomycota (7.06%-88.43%) and Monoblepharidomycota (36.21%-40.78%) were the dominant fungi at the phylum level, and Aspergillus (0.16%-81.04%) and Rhodotorula (0.02%-8.05%) were the dominant fungi at the genus level. Network interaction analysis showed that the microbial network interaction was dominated by the positive correlation connection (97.3%), and the negative correlation connection accounted for 2.7%, and the interactive relationship tended to be cooperative. In summary, the surface snow microbiota of the Urumqi Glacier No.1 was highly diverse, and the seasonal variation in the microbial community reflects the response of microorganisms to atmospheric circulation in different seasons.

Key words: Urumqi Glacier No.1, Tianshan, surface snow, microbial diversity, network interaction analysis

ZHANG Lijuan, DU Han, YUN Fengze, MA Yinghui, ZHANG Xinqiang, Awaguli TUERSUN, MA Zhenghai. Analysis of the microbial diversity of the surface snow from Glacier No. 1 at the headwaters of Urumqi River, Tianshan Mountains[J].Arid Zone Research, 2023, 40(4): 670-680.

Figures/Tables 7

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样品名称	细菌			古菌			真菌
样品名称	Chao1	Shannon	Simpson	Chao1	Shannon	Simpson	Chao1	Shannon	Simpson
TSX1	297.1	3.48	0.05	7.5	1.31	0.36	148.1	1.14	0.38
TSX2	228.1	2.95	0.09	10.5	1.47	0.34	526.1	2.75	0.18
TSX3	279.0	3.06	0.08	11	1.44	0.39	443.1	2.33	0.23

Analysis of the microbial diversity of the surface snow from Glacier No. 1 at the headwaters of Urumqi River, Tianshan Mountains

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