Fig. 3
From: Campanula lingulata populations on Mt. Olympus, Greece: where’s the “abundant centre”?
a Sampling effort per elevation class denoting the route length that was traversed within each elevation class (bars). If an observation was at the limits of each bin, it was included at the previous elevation class. Given also is the number of individuals in each elevation class for 2012 (red line) and for 2013 (green line). b Abundance corrected for invested effort for 2012 (red line) and 2013 (green line) for each elevation class