Table 1. Environmental variables recorded for sampled lakes and their definition.

Environmental variable code	Environmental variable definition
Tree	Proportion of tree type of terrestrial vegetation occupying the lake margin
Bush	Proportion of bush type of terrestrial vegetation occupying the lake margin
Grass	Proportion of grass type of terrestrial vegetation occupying the lake margin
TVdiv	Diversity index for the three terrestrial vegetation types as in $\mathrm{D}=1/{\sum }_{i-1}^n{p}_i^2$
Floating	Proportion of floating type of aquatic vegetation occupying the lake margin
Emergent	Proportion of emergent type of aquatic vegetation occupying the lake margin
Both	Proportion of both floating and emergent types occurring together in lake´s margin
NoVeg	Proportion of lake’s margin without aquatic vegetation
AVdiv	Diversity index for the four considered aquatic vegetation types as in $\mathrm{D}=1/{\sum }_{i-1}^n{p}_i^2$
Transparency	Water transparency measured in meters with a Secchi disk
Mdepth.center	Mean of three depth measurements in the center of the lake
VCdepth.center	Variance coefficient of three depth measurements in the center of the lake
Mdepth.margin	Mean of 10 depth measurements in the margin of the lake
VCdepth.margin	Variance coefficient of 10 depth measurements in the margin of the lake
Area	Lake area in hectares, measured from Google Earth images
Prop.per.area	Ratio between lake’s perimeter and area

p_i = margin proportion occupied by i-th vegetation type. n = number of vegetation types