PD( phylogenetic diversity )whole tree otu es No orU ut on 20 Number of species Faith D P Conservation evaluation and phyloge rsity]. Biological Conservation, 1992, 61(1): 1Faith D P. Conservation evaluation and phylogenetic diversity[J]. Biological Conservation, 1992, 61(1):1-10. http://www.berrygenomics.com/wp-content/uploads/2014/12/otu_tree.png