Table 1. Similarity based OTUs and species richness estimates of the bacterial phylotypes in the four samples.

	Cluster distance 0.03					Cluster distance 0.05
	OUT	ACE	Chao1	Shannon	Coverage	OTU	ACE	Chao1	Shannon	Coverage
AO	1895	7816	4719	6.34	0.81	1602	5950	3780	6.07	0.85
AC	1488	5712	3424	5.73	0.87	1211	3846	2510	5.41	0.90
CO	1997	7981	4597	4.98	0.90	1583	4964	3143	4.64	0.93
CC	1856	8993	5204	5.63	0.82	1493	5443	3450	5.32	0.87

Note: Species richness was estimated using the program MOTHUR as described in Materials and Methods.