Seasonal variations in radionuclide transfer in a Mediterranean grazing-land ecosystem

摘要

We made quarterly determinations of the transfer coefficients and effective transfer coefficients for the radionuclides ~137Cs, ~90Srm, ~40K, ~226Ra, ~228Th over a full annual cycle, in a Mediterranean grazing-land ecosystem. The input and output fluxes of the radionuclides between the different compartments of this ecosystem were quantified for the following processes: root uptake; variation in root and aerial biomass; pasture production; translocation; leaf fall; efflux due to grazing action; resuspension and subsequent aerial deposition of radionuclides.