Canonical Outlying Mean Index ordination plot of sites of species occurrence, with the environmental variables fitted as vectors.

<p>WBS, water body size; WTE, water temperature; EVE, emergent vegetation; ELE, elevation; MAT, mean annual temperature; AIN, aridity index; FOR, forest cover; PPO, permanent ponds; SPO, stream pools; SPR, springs; TPO, temporary ponds. AMA, <i>A</i>. <i>mauritanicus</i>; AMU, <i>A</i>. <i>maurus</i>; BBO, <i>B</i>. <i>boulengeri</i>; BBR, <i>B</i>. <i>brongersmai</i>; BSP, <i>B</i>. <i>spinosus</i>; DPI, <i>D</i>. <i>pictus</i>; DSC, <i>D</i>. <i>scovazzi</i>; HMA, <i>H</i>. <i>aff</i>. <i>meridionalis</i> (eastern form); HME, <i>H</i>. <i>meridionalis</i>; PNE, <i>P</i>. <i>nebulosus</i>; PPO, <i>P</i>. <i>poireti</i>; PSA, <i>P</i>. <i>saharicus</i>; PVA, <i>P</i>. <i>varaldii</i>; PWA, <i>P</i>. <i>waltl</i>; SAL, <i>S</i>. <i>algira</i>.