Table 2

Total numbers of OTUs remaining after filtering out low-abundance OTUs

MethodNo. of OTUs remaininga
Mock communityEnvironmental sample
No filter>1>10No filter>1>10
DBC (complete)1248263NANANA
DBC (parallel)1751368314,23411,7626,087
De novo (USEARCH)3902268623,61617,2617,875
De novo (avg linkage)33616970NANANA
Closed reference7004301609,7997,8674,046
Open reference38525711923,04715,8336,310
  • a Filtering criteria: either all OTUs were included (No filter) or only OTUs with greater than 1 (>1) or greater than 10 (>10) counts were included. NA, not applicable.