Bioindikation mit Characeen

Bioindication is defined as the indication of ecological quality based on composition of organisms of a habitat. The basis forms the knowledge of the relationship between organisms and habitat conditions. The history of bioindication using Charophytes is described. Charophytes have mainly been used for the indication of trophic status. The best way to use Charophytes as bioindicators is on a local scale or for defined water bodies. Communities of organisms are more suitable as bioindicators than single species. Limits of bioindication are demonstrated. Charophytes are actually used for the assessment of ecological status within the WFD and the Habitats Directive.