Table 2.

Niche overlap between pairs of species of Stauracanthus found using all variables selected and only the four most relevant (see text). Schoener’s measure of niche overlap (D) was computed over the whole environmental space of the study area

	All variables		Four variables
	D	HS area (km2)	D	HS area (km2)
SBO–SGE	0·726	1239	0·612	3894
SBO–SSP	0·395	1947	0·468	1593
SGE–SSP	0·417	1770	0·437	1593

HS area, area in which both species were found to have an optimum HS value; SBO, S. boivinii; SGE, S. genistoides; SSP, S. spectabilis.