Canberra

\[D_{Canberra} = \frac {1}{S_{T}} \sum_{j=1}^{S_T} \frac {|S_{Aj} - S_{Bj}|} {S_{Aj} + S_{Bj} }\]

where, \(S_{Aj}\) is the abundance of the jth OTU in sample A

\(S_{Bj}\) is the abundance of the jth OTU in sample B

\(S_{T}\) is the number of OTU’s combined between sample A and sample B