鄯善库木塔格沙漠北缘细菌群落结构特征及影响因素

doi:10.13866/j.azr.2023.08.16

Abstract

Abstract:

The Shanshan Kumtag Desert, which is connected to the city, contains rich and unique microbial resources. To explore the microbial community structure and its relationship with environmental factors in the Shanshan Kumtag Desert, surface (0-5 cm) and deep (45-50 cm) layer sand samples were collected from four points along the northern margin of the desert. Subsequently, the collected samples were analyzed to determine the water content (WC), pH, total carbon (TC), total nitrogen (TN), total organic carbon (TOC), and electrical conductivity. High-throughput sequencing technology was used to analyze the bacterial community structure of the sand samples, and Spearman correlation was used to analyze the correlation between environmental factors and the bacterial community structure. The results showed that the collected sand samples were alkaline, and the dominant bacterial phyla were Actinobacteria, Firmicutes, Proteobacteria, and Bacteroidetes. Among these, the dominant genera were unclassified_f__Micrococcaceae, Bacillus, Sphingomonas, Escherichia-Shigella, and Microbacterium. Significant differences in the bacterial community structure were observed among the different points along the northern margin of the Shanshan Kumtag Desert (P < 0.05). However, no significant difference in species diversity was observed between the surface and deep layer samples. Furthermore, WC, TC, TN, and pH significantly affected the bacterial community structure in the surface samples (P < 0.05), while TOC significantly affected the bacterial community structure in the deep samples (P < 0.05). This study provides a theoretical basis for exploring microbial resources in the Shanshan Kumtag Desert and similar habitats.

Key words: Shanshan Kumtag Desert, high-throughput sequencing, bacterial community structure, environmental factors, physicochemical property

LI Juan, LIU Yang, LIU Guangxiu, CHENG Liang, GUO Qingyun, ZHANG Wei, ZHANG Gaosen. Study on bacterial community structure and influencing factors in the northern margin of the Shanshan Kumtag Desert[J].Arid Zone Research, 2023, 40(8): 1358-1368.

Figures/Tables 9

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References 36

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样本名称	WC	pH	EC/(mS·cm^-1)	TN/%	TC/%	TOC/%
K1_1_S	0.64	9.46	150	0.040	0.670	0.281
K1_2_S	1.30	9.49	143	0.035	0.745	0.321
K1_3_S	1.55	9.67	171	0.044	0.732	0.300
K2_1_S	0.52	8.66	334	0.040	0.485	0.197
K2_2_S	0.53	8.8	350	0.037	0.409	0.196
K2_3_S	0.42	8.98	236	0.029	0.494	0.182
K3_1_S	0.72	9.14	594	0.033	0.383	0.238
K3_2_S	0.53	9.21	523	0.029	0.438	0.160
K3_3_S	0.49	9.22	616	0.030	0.336	0.178
K4_1_S	0.47	9.42	258	0.026	0.513	0.185
K4_2_S	0.37	9.3	282	0.032	0.613	0.236
K4_3_S	0.30	9.32	408	0.043	0.508	0.189
K1_1_D	0.28	8.89	663	0.034	0.616	0.235
K1_2_D	0.35	8.83	633	0.037	0.516	0.231
K1_3_D	0.26	8.97	278	0.035	0.688	0.247
K2_1_D	0.26	9.17	345	0.021	0.430	0.161
K2_2_D	0.35	9.06	332	0.027	0.456	0.214
K2_3_D	0.28	9.05	358	0.021	0.353	0.152
K3_1_D	0.34	9.29	406	0.029	0.527	0.139
K3_2_D	0.45	9.29	424	0.028	0.385	0.128
K3_3_D	0.56	9.35	287	0.042	0.408	0.176
K4_1_D	0.25	8.76	334	0.034	0.571	0.215
K4_2_D	0.35	8.81	282	0.026	0.498	0.220
K4_3_D	0.37	8.64	466	0.037	0.510	0.211

样本名称	香农指数	辛普森指数	ACE指数	Chao 1指数	覆盖度/%	系统发育树多样性指数
K1_1_S	2.390	0.215	254.967	262.154	1.000	31.200
K1_2_S	2.766	0.143	336.400	338.813	0.999	43.398
K1_3_S	1.974	0.215	315.097	318.561	0.999	32.058
K2_1_S	2.277	0.317	284.391	284.000	1.000	32.017
K2_2_S	1.862	0.386	220.833	222.688	1.000	28.580
K2_3_S	3.583	0.156	616.427	633.067	0.999	79.401
K3_1_S	2.622	0.170	245.595	249.200	1.000	31.607
K3_2_S	2.468	0.233	409.968	413.000	1.000	53.739
K3_3_S	2.114	0.247	182.997	184.500	1.000	22.578
K4_1_S	3.922	0.138	776.334	780.650	0.999	81.842
K4_2_S	2.277	0.302	418.711	435.719	0.999	45.497
K4_3_S	3.251	0.105	657.699	662.017	0.999	73.443
K1_1_D	2.856	0.258	504.457	508.081	0.999	51.449
K1_2_D	3.986	0.068	638.214	643.000	0.999	57.332
K1_3_D	2.827	0.155	579.787	599.192	0.998	48.243
K2_1_D	1.843	0.425	230.223	230.273	1.000	31.763
K2_2_D	2.760	0.147	291.824	304.214	0.999	32.989
K2_3_D	1.989	0.342	187.780	187.000	1.000	31.652
K3_1_D	2.350	0.345	389.315	407.083	1.000	59.362
K3_2_D	1.921	0.331	229.616	231.929	1.000	30.269
K3_3_D	2.260	0.278	306.728	308.120	0.999	37.188
K4_1_D	3.134	0.112	468.690	468.333	0.999	63.828
K4_2_D	2.626	0.163	335.807	338.043	1.000	36.498
K4_3_D	2.114	0.296	227.945	226.688	1.000	26.739

Study on bacterial community structure and influencing factors in the northern margin of the Shanshan Kumtag Desert

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