Table 3.

Alpha diversity indices for 18S rRNA gene libraries.

Location	Treatment	Shared phylotypesa	Observed phylotypes	Chao richness estimator	Simpson evenness	Simpson diversity (1/D)
Water	U	16	60 ± 14	71 ± 15	0.05 ± 0.01	3.20 ± 0.88
	P	18	50 ± 12	64 ± 16	0.05 ± 0.01	2.57 ± 0.37
	NP16	16	36 ± 5.2	48 ± 4.8	0.08 ± 0.01	2.70 ± 0.28
	NP75	13	43 ± 14	59 ± 21	0.07 ± 0.04	2.56 ± 0.37
Sediment	U	12	89 ± 19	103 ± 20	0.10 ± 0.08	9.56 ± 8.71
	P	15	86 ± 24	105 ± 28	0.08 ± 0.05	6.07 ± 3.27
	NP16	30	83 ± 10	101 ± 11	0.06 ± 0.03	4.95 ± 1.74
	NP75	16	69 ± 16	82 ± 19	0.07 ± 0.03	4.28 ± 1.35

The libraries were normalized to 10,521 and 9,299 sequences for sediment and water libraries, respectively. The values represent the average of five samples from each treatment ± SEM. ^aNumber of phylotypes shared between replicates.