a. Native species
9 m2 grain 9 m2 grain 9 m2 grain 1 m2 grain 1 m2 grain 1 m2 grain
Variable Estimate p-value Variable Estimate p-value
Intercept 2.938 <0.001 Intercept 1.753 <0.001
Presence of A. selago 0.654 0.001 Elevation -0.003 <0.001
Distance to nearest drainage -0.001 0.031 Topographical wetness index 0.092 <0.001
Elevation -0.002 0.013 Slope 0.017 <0.001
Northness 0.283 <0.001
Slope 0.015 0.009
A. selago*Elevation -0.002 0.027
b. Difference in species richness between grains for native species (native Δ9-1) b. Difference in species richness between grains for native species (native Δ9-1) b. Difference in species richness between grains for native species (native Δ9-1) b. Difference in species richness between grains for native species (native Δ9-1) b. Difference in species richness between grains for native species (native Δ9-1) b. Difference in species richness between grains for native species (native Δ9-1)
Variable Estimate p-value
Intercept 1.088 <0.001
Presence of A. selago 0.171 0.079
Elevation -0.001 0.035
Northness 0.135 0.013
Topographical wetness index -0.047 0.019
c. Alien species c. Alien species c. Alien species c. Alien species c. Alien species c. Alien species
9 m2 grain 9 m2 grain 9 m2 grain 1 m2 grain 1 m2 grain 1 m2 grain
Variable Estimate p-value Variable Estimate p-value
Intercept -0.512 0.040 Intercept 0.251 <0.001
Presence of A. selago -0.996 <0.001 Presence of A. selago -0.112 0.003
Distance to nearest drainage 0.001 0.109 Distance to nearest drainage 0.001 <0.001
Elevation -0.009 <0.001 Elevation -0.001 <0.001
Geology N/A 0.034 Northness -0.025 0.233
Northness -0.238 0.069
A. selago*Elevation 0.005 0.039
d. Difference in species richness between grains for alien species (alien Δ9-1) d. Difference in species richness between grains for alien species (alien Δ9-1) d. Difference in species richness between grains for alien species (alien Δ9-1) d. Difference in species richness between grains for alien species (alien Δ9-1) d. Difference in species richness between grains for alien species (alien Δ9-1) d. Difference in species richness between grains for alien species (alien Δ9-1)
Variable Estimate p-value
Intercept 0.144 <0.001
Elevation -0.001 0.085
Mean Temperature -0.260 0.154
Geology N/A 0.052