Table 2.

Number of sequences, OTUs, coverage, and diversity indices of the saline and alkaline soil samples from four different natural plant communities at three soil depths based on 16S rRNA gene metagenomic data.

Sample ID	No. of high-quality sequences		No. Sobs	Good’s coverage	Species richness		Diversity indices
	Total	Sub-sampled			Chao 1	ACE	Shannon	Inv. Simpson
AL/a/1	33,522	11,242	558.8 ± 7.1	0.99	640.9 ± 19.4	642.4 ± 14.9	5.1	72.0 ± 1.3
AL/a/2	47,228	11,242	781.7 ± 10.1	0.98	971.0 ± 34.6	971.5 ± 26.2	5.5	99.7 ± 2.1
AL/a/3	43,202	11,242	827.7 ± 10.9	0.98	1057.7 ± 39.1	1057.5 ± 30.5	5.6	127.4 ± 2.4
AP/a/1	25,957	11,242	745.3 ± 8.3	0.98	868.0 ± 24.0	889.4 ± 19.7	5.3	74.6 ± 1.3
AP/a/2	28,213	11,242	581.0 ± 7.0	0.99	664.9 ± 19.1	672.4 ± 15.6	5.1	55.6 ± 1.2
AP/a/3	20,834	11,242	485.5 ± 5.4	0.99	539.2 ± 13.9	556.9 ± 12.6	4.5	30.6 ± 0.5
AA/a/1	31,760	11,242	740.2 ± 8.4	0.98	860.3 ± 24.0	873.6 ± 19.6	5.1	59.3 ± 1.0
AA/a/2	15,408	11,242	815.5 ± 4.2	0.99	851.1 ± 8.4	880.6 ± 9.1	5.5	93.9 ± 1.2
AA/a/3	15,517	11,242	1279.3 ± 6.0	0.98	1354.7 ± 11.6	1438.2 ± 14.7	5.7	72.2 ± 1.1
AF/a/1	35,527	11,242	1738.5 ± 15.8	0.95	2242.1 ± 53.2	2356.6 ± 48.6	6.5	288.5 ± 6.0
AF/a/2	26,993	11,242	1556.6 ± 12.9	0.96	1881.7 ± 38.1	1979.1 ± 35.8	6.3	226.5 ± 4.3
AF/a/3	27,441	11,242	1065.6 ± 8.4	0.98	1176.1 ± 20.2	1191.4 ± 16.9	6.0	183.6 ± 3.1
AL/b/3	29,722	11,242	597.0 ± 6.8	0.99	667.6 ± 17.3	670.2 ± 13.7	4.9	47.3 ± 0.9
AP/b/1	15,618	11,242	609.4 ± 4.2	0.99	643.9 ± 8.8	666.4 ± 9.0	5.0	59.4 ± 0.7
AA/b/2	61,923	11,242	635.4 ± 7.4	0.99	710.3 ± 18.8	705.5 ± 14.0	5.0	55.8 ± 1.1
AF/b/1	11,242	11,242	1050.0 ± 0.0	1.00	1052.0 ± 0.0	1062.9 ± 0.0	5.9	133.5 ± 0.0
AP/c/1	53,380	11,242	690.9 ± 5.9	0.99	734.4 ± 13.4	725.0 ± 9.0	5.5	99.0 ± 2.0
AF/c/2	39,138	11,242	889.8 ± 8.7	0.99	990.5 ± 21.4	994.5 ± 17.1	5.6	94.7 ± 1.9

The abbreviations of the sampling sites are given in Table 1.