Figure 5: A representation of the effect of grain size on
drivers of native plant species richness on Marion Island: a.elevation, b. northness, and c. topographical wetness
index (TWI). Effect of each of the significant predictors of
Δ9-1 for native species is shown: the green and yellow
lines show the effect of the predictor variable on species richness at
large and small grains respectively. The effect of grain size on
richness is further illustrated in schematics showing how richness
changes in large and associated nested small plots along gradients of
each of the significant predictors of Δ9-1. Coloured
letters represent different species. Only species that do not occur in
the small plot but occur in the large plot are added to the area of the
large plot.