Table 2

Unique and shared richness of microbial communities
Bacteria Archaea
ATTa SUSb ATTa SUSb
Total OTUsc 2,072 1,216 60 266
Normalized OTUsd 1,243 55
% OTUs shared 12% 13% 31% 6%
% Sequences in Shared OTUs 37% 31% 90% 22%

a ATT = Microbial communities attached to in situ samplers.

b SUS = Microbial communities suspended in groundwater.

c Operational taxonomic units (OTUs) calculated using a cutoff of 97% average nucleotide similarity.

d The number of OTUs found in a randomized subset of n sequences where = the number of suspended samples. This was done to account for the greater number of ATT sequences among both bacteria and archaea.

Flynn et al.

Flynn et al. BMC Microbiology 2013 13:146   doi:10.1186/1471-2180-13-146

Open Data