Cycling of radiocesium and -strontium in natural ecosystems

The project investigates on the fate of radiocesium and strontium 90 in natural ecosystems in order to improve the knowledge of the cycling mechanisms and the understanding of their short and long term behaviour. The experimental strategy is focusing on the fate of radiocesium and strontium 90 after their deposition in forest systems. Based on the measurements, transfer equations are tested and discussed, and better radioecological models for the long and short term cycling of cesium and strontium are proposed. The objectives and results of the seven contributions of the project for the reporting period are presented. (R.P.) 27 refs., 6 figs., 3 tabs