Can someone explain this figure based on cluster analysis of different soil samples based on OTU abundance for each soil.what is the impact of genetic distance between different treatment samples?
First, the Bray-Curtis dissimilarity creates a matrix in function of the how much the samples are different. Whereas the UniFrac measures the phylogenetic distance between sets of taxa in a phylogenetic tree as the fraction of the branch length of the tree that leads to descendants from either one environment.
In the figure, immediately you saw a separation in two clusters and especially the AFM is completely different from the others species.