Table 4. Species characteristics of environmental volume, local abundance, habitat occupancy, and geographic range of Spanish montane grassland species as a function of their ecological breadth (WGS, wet-grassland specialists; WGG, wet-grassland generalists; MHG, mesic-habitat generalists; G, generalists; defined in Table 3). Volumes are expressed as a percentage of the maximum possible. Differences among groups were determined by a Kruskal-Wallis nonparametric ANOVA and Dunn's nonparametric post hoc test (Zar 1984: 200). Statistically significant (alpha = 0.05) differences among groups are indicated by different superscripts.

 

	Ecological breadth group				Statistics
	WGS	WGG	MHG	G	Chi2	P
Environmental volume
median	0.00b	2.76a	6.65a	0.48ab	21.75	0.0001
range	(0.0-21)	(0.0-75)	(0.0-75)	(0.0-63)
no. species	28	71	66	67
Mean abundance
median	1.00a	1.10a	1.00a	0.50b	39.70	0.0001
range	(0.1-2.0)	(0.1-4.0)	(0.1-2.5)	(0.1-2.0)
no. species	28	71	66	67
Habitat occupancy
median	100.0	55.2	55.4	57.1	6.84	0.08
range	(18-100)	(14-100)	(11-100)	(15-100)
no. species	28	71	66	67
Regional range (x105 km2)
median	1.40c	2.19bc	2.80ab	3.81a	18.02	0.0001
range	(0.08-5.81)	(0.25-5.81)	(0.29-5.81)	(0.02-5.81)
no. species	28	66	53	52
Continental range
median	33	33	34	32	4.16	0.24
range	(7-48)	(3-48)	(4-47)	(2-48)
no. species	27	56	48	40