The project ''Immission-ecological study on the impact of fluorides on
vegetation in the vicinity of fluoride emitters' was designed to inve
stigate the accumulation of fluorides in separate compartments of fore
st ecosystems near an aluminum factory in Upper Austria. The total acc
umulation in selected ecosystems is contrasted with total atmospheric
deposition during the emission period of about 50 years. A comparison
of total deposition and total accumulation of fluorides indicates, tha
t a large part of the fluoride deposited forms a long-term deposit in
the soil and in surface humus and may lead there to disturbances in so
il and humus dynamics.