Table 2.

Sequencing information and statistical analyses of archaeal 16S rRNA gene clone libraries.

Soil depth	NC	NO	Coverage (%)	ACE	Chao 1	Shannon	Simpson
3–5 cm	50	7	96.0	9.24 (7.3–24.6)	7.5 (7.0–15.3)	1.42 (1.2–1.7)	0.30 (0.21–0.40)
13–15 cm	42	5	95.2	6.94 (5.2–24.2)	6 (5.1–18.5)	1.07 (0.8–1.3)	0.43 (0.29–0.56)
23–25 cm	33	7	97.0	7 .38 (7.0–12.2)	7 (0–7)	1.74 (1.5–2.0)	0.18 (0.11–0.25)
33–35 cm	43	4	97.7	4.78 (4.1–14.0)	4 (0–4)	0.79 (0.5–1.1)	0.58 (0.41–0.74)
43–45 cm	45	5	95.6	8 (5.6–20.8)	5.5 (5.0–13.3)	0.94 (0.7–1.2)	0.48 (0.35–0.60)
53–55 cm	39	5	97.4	0 (0-0)	8 (5.4–29.4)	0.99 (0.7–1.3)	0.42 (0.33–0.51)
63–65 cm	30	7	96.7	17 (8.1–98.3)	10 (7.4–30.0)	1.35 (1.0–1.7)	0.31 (0.21–0.41)

Notes: NC is the number of clones in each library. NO is the number of Operational Taxonomic Unit (OTU) based on 97% nucleotide identity.