Fig. 3.

Depth (number of reads specific to a taxon) and breadth (number of unique k-mers) of coverage reported by KrakenUniq for microbial taxa in a metagenomic sample. Taxa with large amounts of unevenly mapped reads, and hence low breadth of coverage, are considered to be false-positive identifications (left upper corner). Red solid horizontal and vertical lines mark optional depth (~ 100 reads) and breadth (~ 1000 unique k-mers) of coverage filters applied to the KrakenUniq output