Table 2.

Distribution of strategies that alien Pinaceae adopt to associate with suitable EcMF in regions with no native Pinaceae spp.

EcM strategy	Regions without native Pinaceae	Regions with native Pinaceae
Co-introduction	125 +	44 −
Native to both areas	1 −	98 +
Novel interaction	4	24

Strategies that are significantly over- or under- represented in regions with or without native Pinaceae species compare with the proportion expected by chance (G-test, p value < 0.001) are marked by + indicating over- or under- representation within the group.