Fig. 5From: MetaBinG2: a fast and accurate metagenomic sequence classification system for samples with many unknown organismsComparison of community composition structures derived from metagenome samples from different cities. a Average community abundance of three cities at phylum level. The number of samples for each city is 18 (Sacramento), 24 (Boston) and 1451 (NY). b The proportion of samples containing a certain phylum. Only phyla with abundances more than 1% were counted for each city. c The community diversity reflected by Shannon index of three cities. Y-axis stands for the Shannon index calculated by the phyla distribution of a sampleBack to article page