Fig. 5
Bacterial diversity in deposition and air samples. a Chao1 estimates of the number of 97% of the operational taxonomic units (OTUs) in the deposition samples. b Chao1 estimates of the number of 97% of the OTUs in the air samples. Each point represents a datum of each particle size bin for each month. The line indicates the mean particle size-resolved results for each month. c Principal coordinate analysis plot of bacterial memberships in terms of the Jaccard indices, based on 97% OTUs. Significant differences for pair-wise comparisons are indicated by different letters (a and b). d Principal coordinate analysis plot of the bacterial structures in terms of the Bray–Curtis distances, based on 97% OTUs. Significant differences for pair-wise comparisons are indicated by different letters (a, b, and c)