Table 3. Descriptive values of habitat variables for the three clusters.

A. Continuous variables
	TORRENTS					PONDS					RIVERS / LAKES
	Mean	SD	v.test	p.value		Mean	SD	v.test	p.value		Mean	SD	v.test	p.value
SPL	64.51	7.45	8.11	<0.001		45.39	4.37	-6.26	<0.001		52.31	4.05	-4.47	<0.001
Air temperature	19.93	3.17	-4.87	<0.001		22.09	2.72	1.51	0.130		23.59	2.77	4.50	<0.001
Water temperature	19.46	2.92	-5.25	<0.001		21.28	2.63	0.96	0.334		23.80	3.44	5.39	<0.001
Depth	43.40	25.07	-2.58	0.010		40.13	33.18	-0.94	0.343		75.08	64.27	3.79	<0.001
Width	484.74	284.32	-5.00	<0.001		484.13	221.83	-1.14	0.245		1198.08	679.50	6.82	<0.001
Slope	0.20	0.36	3.27	0.001		0.00	0.00	-1.82	0.068		0.01	0.02	-2.36	0.018
B. Substrate categories
	TORRENTS					PONDS					RIVERS / LAKES
	Cat/Clu	Clu/Cat	v.test	p.value		Cat/Clu	Clu/Cat	v.test	p.value		Cat/Clu	Clu/Cat	v.test	p.value
Leaf	100	36.17	4.85	<0.001		0	0	-2.35	0.019		0	0	-3.46	<0.001
Rock	100	23.40	3.57	<0.001		0	0	-1.58	0.115		0	0	-2.47	0.014
Branch	90.48	40.43	3.46	<0.001		0	0	-2.82	0.005		9.52	16	-1.63	0.102
Sand	0	0	-2.45	0.014		100	26.67	3.70	<0.001		0	0	-0.17	0.866
Ground	0	0	-4.28	<0.001		0	0	-0.44	0.663		100	36	5.27	<0.001
Leaf litter	0	0	-4.87	<0.001		100	73.33	7.19	<0.001		0	0	-1.32	0.187
Water	0	0	-5.15	<0.001		0	0	-0.75	0.450		100	48	6.33	<0.001

A. Mean and standard deviation values (SD) of each variable are shown for the ’torrents’, ’ponds’ and ‘rivers/lakes’ clusters. B. Percentage of categories’ individuals in each cluster (Cat/Clu) and percentage of clusters’ individuals in each category (Clu/Cat) are represented. The sign of the v-test values indicate whether the variable is over (positive value) or under-represented (negative value) compared to the global average values. P-values of the respective v-tests are represented.