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Cycling routes, rates of transport, and resultant concentrations of the fallout radionuclides 90 Sr and Cs in northern Alaskan ecosystems were defined during the period to Radiochemical analysis of extensive samples of biota and whole-body counting of Cs in Eskimo and Indian ethnic groups were related to ecological principles, especially the concept of trophic niche, which elucidated the observed patterns of radionuclide concentrations.
Experiments involving Sr and Cs radioisotopes applied to natural Cladonia-- Cetraria lichen carpets yielded effective half-times of 1.
Direct and indirect estimates of Cs half-times in Eskimos on a caribou meat diet were made by dietary manipulation and by relating dietary Cs intake and resultant change between periodic whole body counts. Effective half- times of 70 days for adults more than 21 years old and minors 14 to 20 years old and of 45 days for children less than 14 years old were found.
Suitable mathematical models were used to compute lichen forage ingestion rates of free- ranging adult caribou 4. Special emphasis was made of cultural influences upon the food-gathering patterns of the native peoples studied.
Culture change, especially in the form of food stamps, welfare payments, acquisition of snowmobiles, and improved housing was documented throughout the study and noticeably reduced the radionuclide accumulations. Similar records in OSTI.
GOV collections:. Title: Fallout strontium and cesium in northern Alaskan ecosystems during Full Record Other Related Research.
Abstract Cycling routes, rates of transport, and resultant concentrations of the fallout radionuclides 90 Sr and Cs in northern Alaskan ecosystems were defined during the period to Authors: Hanson, Wayne C. Hanson, Wayne C. Fallout strontium and cesium in northern Alaskan ecosystems during United States: N. Copy to clipboard.
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