Table 2. Shared OTUs in the 100 most abundant OTUs found in the pooled data from each environment (water column, shallow sediment and deep sediment).

Top 100 OTUs	Number of OTUs/% reads that overlap with:
Base data set	Water column	Shallow sediment	Deep sediment
Water column	−/−	14/11.9%	7/5.8%
Shallow sediment	41/56.3%	−/−	33/40.6%
Deep sediment	24/37.0%	62/87.8%	−/−

Abbreviation: OTU, operational taxonomic unit.

For the environment shown in each row, each pairwise comparison shows the number of shared OTUs and the percent of total reads in the top 100 OTUs comprised by those shared OTUs.