For many years, ecologists have been interested in the uptake, retention, and excretion of stable elements by organisms as well as the total pattern of mineral cycling within and among ecosystems. The availability of radionuclide tracers as a tool in studying stable elements has stimulated research and provided knowledge previously not available. Although the subject of cycling could have been considered in our discussion of physiological studies in Chapter 8, we have elected to present it as a category by itself. This is justified by the enormity of the subject and by the special interest of radiation ecologists in the cycling of man-made radionuclides that find their way into the environment.
KeywordsBody Burden Rock Ptarmigan Cycling Study Radionuclide Technique Tulip Poplar
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