Table 2.

The abundance of unique sequences, OTUs grouped at 97% similarity and richness, diversity and coverage statistics calculated using the OTUs

	Unique sequences	OUT	Chao1 richness	Shannon index	Good's coverage
EG19-50 m
Bacteria	44449	858	929.2	7.6	99.5%
Archaea	29484	208	405.2	6.25	99.8%
EG20-55 m
Bacteria	22226	816	1059.2	7.33	99.1%
Archaea	30906	309	720.8	5.59	99.4%