Mobile und immobile Probensammlung mit Hilfe von Bienen und Birken

Summary The analysis of birch sap and honey has been used to predicase the metal-loading over a large area. The distribution of lead and cadmium in Münster and its surroundings has been investigated. In general, the metal concentrations in birch sap and honey were found to depend on the pH-value and the metal content of the soil. In the case of lead, the higher concentration at the busy highway areas can be easily observed. It is evident that a noise protection wall is also a protection against lead emission from the exhaust of the automobiles in the region of Nienberge, a suburb of the city of Münster.