Table 3. The diversity indices and richness estimators of the bacterial and archaeal 16S rRNA gene clone libraries. OTUs of the 16S rRNA gene sequences were determined at 3% for bacteria and 2% for archaea sequence distance cut-off using the DOTUR program.

Clone library	No. of clone	No. of singleton	No. of OTUs	C	H	1/D	J	SACE	Schao1
BU1368	180	166	39	88.9	4.37	15.48	0.828	71.0	63.4
BU1369	196	155	54	85.7	4.80	16.10	0.834	91.3	86.5
BU1370	196	193	64	79.6	5.19	23.53	0.865	128.6	142.8
BU1371	185	166	61	81.1	5.06	18.44	0.853	115.9	101.6
AU1368	88	66	13	92.0	2.40	3.53	0.650	28.2	34
AU1369	92	72	20	83.7	2.96	4.97	0.683	69.8	111
AU1370	88	63	17	89.8	2.66	3.69	0.649	29.5	29
AU1371	87	60	15	90.8	2.23	2.52	0.571	28.5	29

The coverage (C), Shannon-Weiner (H), Simpson (D) and evenness (J) indices, and S_ACE and S_chao1 richness estimators were calculated using the OTU data.