Population genetics and plant growth experiments as prerequisite for conservation measures of the rare European aquatic plant (Alismataceae).

Information provided by population genetic studies is often necessary to effectively protect endangered species. In general, such data is scarce for aquatic plants and this holds also for , an aquatic macrophyte endemic to northwestern and western Europe. It is threatened across its whole distribution range due to human influences, in particular due to eutrophication and intensive fish farming.