title: [Biological monitoring of water quality].
abstract: The degree of purity of surface waters can be seen from investigations on the communities of life of plant and animal organisms. A great number of organisms characteristic of certain degrees of pollution were classified in the "saprobic system", which is still valid. As a supplement to the chemical water analysis, the bio-ecological test is an optional method for characterizing the quality of waters--as, for instance, in the case of the river Lippe.
mesh_terms: D000818:Animals; D001681:Biological Assay; D004463:Ecology; D005618:Fresh Water; D005860:Germany, West; D010944:Plants / Q000032:analysis; D014867:Water / Q000032:analysis* / Q000592:standards; D014873:Water Pollutants / Q000032:analysis*; D014876:Water Pollution
chemical_list: D014873:Water Pollutants; D014867:Water
vernacular_title: Die biologische Messung der Wassergüte.