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Unveiling Distribution Patterns of Freshwater Phytoplankton by a Next Generation Sequencing Based Approach

Figure 2

Phylogenetic tree (based on SILVA106 reference tree) showing representative sequences from all phytoplankton-related OTUs.

Inner ring indicates the similarity of sequences to the nt/nr database (NCBI) as determined by BLAST search. Outer ring (bars) indicates the number of reads assigned to each node when using the resampled dataset (100 reads); note that nodes where all reads were removed by resampling are still given. Colored branches indicate group assignments from Bayesian classifier against a phytoplankton database.

Figure 2