Fig. 1From: PhyloMed: a phylogeny-based test of mediation effect in microbiomeExample phylogenetic tree and causal path diagram of a local mediation model. The \(v_1\)-\(v_{11}\) are relative abundances of the taxa on leave nodes. PhyloMed considers subcompositions at every internal node of the phylogenetic tree and tests the mediation effect of the subcompositionsBack to article page