Fig. 4From: Adaptive differentiation coincides with local bioclimatic conditions along an elevational cline in populations of a lichen-forming fungusPhotosynthetic CO2 gas exchange of L. pustulata highland (population 6; blue) and lowland population (populations 1 to 5; red) related to thallus water content (TWC). TWC is expressed as mm “precipitation”. Polynomic regressions lines are indicated with their r2 value. Circles = net CO2 uptake, triangles = dark respirationBack to article page