An Evaluation of Ratio Systems in Radioecological Studies
| Autor: | Keatinge Mj, Hugh Synnott, P.A. Colgan, E.J. McGee, K.J. Johanson |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Calluna
Radionuclide Peat biology Soil test Epidemiology Ecology Health Toxicology and Mutagenesis Potassium Radioisotopes Picea abies Plants biology.organism_classification Vaccinium myrtillus Cesium Radioisotopes Environmental chemistry Content (measure theory) Soil water Soil Pollutants Radioactive Environmental science Radiology Nuclear Medicine and imaging |
| Zdroj: | Health Physics. 70:215-221 |
| ISSN: | 0017-9078 |
| DOI: | 10.1097/00004032-199602000-00009 |
| Popis: | Replicate samples of soil, Juncus squarrosus and Calluna vulgaris were taken within a grid system on an organic peatland soil site in Ireland. A similar sampling survey was carried out on an organic rich forest soil site in Sweden, where Vaccinium myrtillus and Vaccinium vitis-idaea with corresponding soil samples were taken within a Picea abies stand. The data were used to investigate the relationship between soil and plant {sup 137}Cs content and to examine the validity of using ratios to describe this relationship. Findings from both countries were in agreement. There were no significant changes in plant {sup 137}Cs concentration associated with increasing soil content. When data from both countries were merged and treated as a single data set, a significant overall positive correlation (95% confidence level) between soil and plant {sup 137}Cs levels was observed. Concentration ratios and transfer factors were calculated for {sup 137}Cs and {sup 40}K uptake from soils to plants. Both ratio types exhibited a clearly defined decrease associated with increasing soil concentrations for both radionuclides. Findings demonstrate serious problems with the use of ratios for the evaluation of radionuclide transfer. 28 refs., 4 figs., 10 tabs. |
| Databáze: | OpenAIRE |
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