Table 3.

Relationships between aquatic plant (S_AP), hydrophyte (S_HY), and not-obligate aquatic plant (S_NO) regional composition (as represented in the two-dimensional NMDS space) and the following environmental drivers using ‘envfit’ in the R package ‘vegan: y (latitude), Area (area of a given regions), Lake (total surface occupied by lakes at the regional scale), Rive (the linear development of natural hydrosystems at the regional scale), Temp (regional mean annual temperature), H (regional heterogeneity index by Chappuis et al., 2012), Inkm (regional inhabitants per km²).

	SAP		SHY		SNO
Driver	R2	P	R2	P	R2	P
Temp	0.88	0.001	0.71	0.001	0.89	0.001
y	0.83	0.001	0.76	0.001	0.87	0.001
Area	0.79	0.001	0.72	0.001	0.62	0.002
Rive	0.70	0.001	0.63	0.002	0.49	0.008
Lake	0.52	0.002	0.51	0.006	0.50	0.002
H	0.12	0.36	0.16	0.219	0.12	0.339
Inkm	0.06	0.57	0.12	0.354	0.07	0.529