Table 4.

Summary of the diversity indices of dsrB genes amplified from sediment samples in the S. alterniflora (S), transition (T), and P. australis (P) stands.

Season	Sample	NSa	90% Similarity cutoff				80% Similarity cutoff
			NOb	Chao1	ACE	Shannon	NOb	Chao1	ACE	Shannon
Spring	PIa	414	187	421	600	4.7	144	306	356	4.3
	PIb	704	310	1096	2137	5.4	202	456	846	4.8
	TIa	778	294	1277	2605	5.3	203	530	847	4.8
	TIb	706	307	1000	2179	5.3	215	493	874	4.8
	SIa	971	165	331	460	4.7	138	199	215	4.5
	SIb	701	303	1558	3092	5.3	214	584	1073	4.9
Summer	PIIa	523	274	591	989	5.3	193	302	463	4.9
	PIIb	675	285	979	2650	5.3	191	466	1093	4.7
	TIIa	740	311	883	1349	5.5	209	483	680	4.9
	TIIb	686	279	882	1923	5.3	184	455	705	4.7
	SIIa	704	285	1015	2283	5.2	185	407	570	4.6
	SIIb	890	140	324	368	4.6	116	163	164	4.3

The diversity indices were calculated at 90 and 80% similarity cutoffs using normalized sequence numbers. Sample names are as described in Figure 1.

NS^a, number of sequences; NO^b, Number of OTUs.