Fig. 1. Community dynamics over 12 weeks of growth. All four community types (A, B, C & D) consist of the same four species, which differ in their initial relative abundances depending on the community type (Table 1). The four species were L. minor (Lm), L. trisulca (Lt), S. polyrhiza (Sp), and W. columbiana (Wc). Each community type was replicated in 12 mesocosms, the means of which are shown as bold lines.