Table 1. Diversity of OTUs.

Bolded text indicates significantly different values as determined by Welch’s two sample t-test.

	Field		Tank
	D	H	DD	DH	HH
Number of samples	49	30	7	5	7
Number of OTUs	26,579	9,240	11,754	5,821	5,493
Simpson Diversity	0.84	0.64	0.89	0.87	0.78
Shannon diversity	3.08	2.36	3.77	3.29	2.82
Rarefied richness	542.42	308.00	1,679.14	1,164.20	784.71