Fig. 2.

Proportions (%) of (a) mcyB, (b) aerB, and (c) apnC among red- or green-pigmented Planktothrix spp. Mo, Lake Mondsee (Austria); Irr, Lake Irrsee; Wa, Lake Wannsee; Fre, Frederiksborg Slotssø; other, occasionally sampled lakes and lakes sampled only once. The whiskers of each box indicate the 10th and 90th percentiles. If an overall difference between lake groups within a pigmentation type was found, superscripts (a, b) indicate homogeneous subgroups not significantly different at P<0.05.