Atmospheric Pollutants in Forest Areas

Deposition in Forest-Ecosystems.- Deposition of gaseous pollutants in a douglas fir forest.- Gasdep — Gaseous deposition measurements of SO2, NOx and O3 to a spruce stand: Conception, instrumentation and first results of an experimental project.- Comparison of SO2-concentrations and immission-rates with bulk precipitation data.- Wet and dry deposition of atmospheric trace elements in forest areas.- Precipitation input of inorganic chemicals in the open field and in forest stands — Results of investigations in the State of Hesse.- Trends of heavy metal pollution by wet deposition in the Federal Republic of Germany during 1980 – 1984.- Bulk deposition into the catchment “Grosse Ohe”: Results of neighbouring sites in the open and under spruce at different altitudes.- Input of atmospheric pollutants in a remote highland area.- Winter deposition rates of atmospheric trace constituents in forests: Assessment of total input.- Interception of Fogwater.- Design of a fog water collector for chemical analysis.- The temporal distribution of trace element concentrations in fog water during individual fog events.- Observation on fog water composition in Hamburg.- Case-Studies.- Temporal variations of trace substances during individual rain events.- Preliminary results and experiences with a new in-situ measurement system of rainfall acidity in forest areas of Rheinland-Pfalz / Federal Republic of Germany.- Occurrence of gaseous pollutants in forest stands.- Possible influences of chlorine containing species on forests.- Effects on Ecosystems.- Watersolubility of heavy metals in deposition samples — Interpretation and prediction of bioavailability.- Dry deposition, retention and wash-off processes of heavy metals in beech crowns: analysis of sequentially sampled stemflow.-Cadmium and lead in the food web of a forest ecosystem.- Studies on biocenoses, individual organisms and deposition rates in the Egge mountains, an area heavily affected by forest decline.- Deposition/canopy-interactions in two forest ecosystems of Northwest Germany.- Processes in the canopy of trees: internal and external turnover of elements.- List of Participants.