Fluoride load on ecosystems in western part of Krusne hory Mts determined by bioindication

Chemical analyses of bone tissue of red deer from two hunting grounds situa ted in the Krusne hory (Ore Mountains) have revealed different trajectories of fluorine lends to these forested areas since sixties. Concentrations of fluorine in the site father (a 40 km) from the emission sources display re latively stable course through the last fifty years, did not reach values t hat can be stressing or even live limiting to red deer, and signified decre asing trend in last decade. Long-term course of fluorine concentration in s amples from the second ground (half distance) has raising tendency since fi fties. The species of this region have not been able to resist to high immi ssion loads from near coal power plants anti ecosystem balance have been di sturbed. This resulted, except others, into forest decline (Norway spruce). Since seventies most of the determined fluorine concentration indicate ini tial or already developed stages of fluorosis in red deer.