Morphological variation of Bolboschoenus maritimus population over a ten year period

The morphological variation of clones of Bolboschoenus maritimus was studied during a ten year period on the Rozkoš reservoir, Czech Republic. The reservoir consists of two partly isolated sections, one with stable and the other with fluctuating water levels. Variations between individual localities (effect of clone and site) was more important than temporal variations within the same clone (plasticity). With respect to some morphological characters there was a tendency for the formation of subpopulations at particular sections of the reservoir.