Extended Data Fig. 2: Herbivore exclusion effects on plant richness related to changes in light availability.
Relationship between the LRR of light availability to herbivore exclusion and the LRR of native (orange points) and exotic (grey points) species richness to herbivore exclusion. Sites had a long or short evolutionary history of grazing and included unfertilized control plots and plots fertilized with NPKµ. Per plant provenance category, n = 119 for long-history sites and n = 182 for short-history sites. For native richness, there was a significant linear regression in both long- (P = 0.0008, R2 = 0.08) and short-history sites (P = 0.0004, R2 = 0.06), so trendlines were produced using geom_smooth (ggplot2 package in R). The coloured bands represent the 95% confidence intervals.
