Table 1. Elevational range-size (ERR) slopes regressed against
metrics of familial distributions across Malesia.
Table of variable definitions and results from across-family analyses
using phylogenetic independent contrasts (PIC). To facilitate
interpretation of findings and slope comparisons, values shown represent
z-scaling of all variables and setting intercepts to zero. The response
variable used in each model is abbreviated as ERR, which represents the
change in average elevational range-size with elevation (slope),
replicated for each species-rich plant family. Predictor variables
consisted of metrics of species richness; familial distribution and
boundaries along elevational gradients; evolutionary age; latitudinal
extent; and biogeographical metrics of overlap, endemism, or
cosmopolitanism within Malesia. Analyses were conducted separately for
each variable because of covariation among them.