Figure 2.

Pairwise correlations of abundance-weighted compositions measured at different taxonomic resolutions based on Procrustes analyses. The community analyses are conducted on eight distinct data sets: (a) case #1 America-Soils, (b) case #2 Arctic-Soils, (c) case #3 NYpark-Soils, (d) case #4 NYfarm-Soils, (e) case #5 TaraSur-Seawaters, (f) case #6 TaraChl-Seawaters, (g) case #7 WEC-Seawaters and (h) case #8 SECS-Seawaters. Measures of taxonomy-based compositions are calculated following two types of hierarchical classification (sequence similarity: otu97 to otu70 and database annotation: species to phylum), and compared with the phylogeny-based composition using UniFrac metric.