Effects of environmental heterogeneity on plant species richness
(Hypothesis 3)
Results showed that light heterogeneity had a positive effect on plant
species richness (p = 0.005, r² = 0.57, fig. 6). The heterogeneity of
potassium correlated slightly positively with increasing plant species
richness, but this relationship was not statistically significant when
outliers were removed (excluding all values above 1.5 * interquartile
range).