Figure 5.

UPGMA clustering tree of the bacteria (A) and fungi (B) at the phylum level as affected by different types of interference of birch secondary forest in the Greater Khingan Mountains in China. On the left is the UPGMA cluster tree structure, and on the right is the relative abundance distribution of each sample at the phylum level. UPGMA (Unweighted Pair-group Method with Arithmetic Mean) is a commonly used clustering analysis method in environmental biology. It studies the similarity between different samples by clustering analysis of samples and constructing cluster trees of samples. The UPGMA cluster tree presented in this paper is based on Weighted Unifrac distance calculation, which is widely used in microbiome studies.