2.5 Phylogenetic diversity analysis
\begin{equation} \text{PD}\sum_{\{c\in C\}}\text{Lc}\text{\ \ \ \ \ \ }\backslash n\nonumber \\ \end{equation}
C is a phylogenetic tree, c is a branch on C and Lc is the branch length of C.
The box diagrams of the reference and disturbance sites were completed by origin 9.1 (Seifert et al., 2014). The “pwr” (Stephane et al., 2018) package in R was used for paired t test to clarify whether the reference sites were different from the disturbance sites.