Table 4.

Acetogen community diversity indices of four treatments at 99% cutoff

Treatment	No. of OTUs	Chao1	Shannon	Pielou’s evenness	Simpson	Good’s coverage
Control	15	22.0	1.89	0.61	0.23	89.0
TWA4	10	13.0	1.48	0.58	0.32	94.3
XP	12	14.5	1.62	0.61	0.30	93.2
TWA4XP	7	13.0	0.96	0.37	0.51	95.0

OTUs: operational taxonomic units. Good’s coverage (1−n _scp/n _total, n _scp is the number of single clone phylotypes and n _total is the total number of sequences) was estimated using the summary.single command of MOTHUR. The Pielou’s evenness was estimated as Shannon/ln(Chao1). The total number of sequences was 73, 70, 74, and 80 in the control, TWA4, XP, and TWA4XP treatments, respectively