Table 2. Matrix used to combine arrival potential and survival potential into final relative risk rankings.

		Arrival Potential
		Lowest	Lower	Intermediate	Higher	Highest
Survival potential	Highest	Intermediate	Intermediate	Highest	Highest	Highest
	Intermediate	Lowest	Intermediate	Intermediate	Intermediate	Highest
	Lowest	Lowest	Lowest	Lowest	Intermediate	Intermediate

For example, given a lowest arrival potential and a highest survival potential, the overall introduction potential would be intermediate. At the opposite, given a highest rank of arrival potential and intermediate survival, the final relative risk invasion would be highest (modified from Casas-Monroy et al. [27]).