Table 3.

Comparisons of Aedes albopictus and Aedes aegypti niches within a single range.

Range	Niche overlap (D)	Niche similarity		Equivalency
		Ae. albopictus → Ae. aegypti	Ae. aegypti → Ae. albopictus
Asia	0.61	similar*	similar*	different*
Africa	0.51	ns	ns	different*
North America	0.19	ns	ns	different*
South America	0.62	ns	ns	different*

ns = not significant.

*The ecological niches are significantly (α = 5%) more similar (similarity test) or different (equivalency test) than expected by random.