|SREL Reprint #0454|
Seasonal Variation in Radiocesium Concentrations in Three Tree Species
T. Garten, Jr. Lind A. Briese, Rebecca R. Sharitz, and J. B. Gentry
Radiocesium concentrations in leaves and stems of
black willow (Selix nigra), wax myrtle (Myrice cerifera),
and tag alder (Alnus serrulata) trees inhabiting a floodplain
contaminated by production-reactor effluent were measured over 1 year.
In willow and myrtle trees, leaf radiocesium levels were highest in the
spring and declined during the growing season; stem levels remained relatively
unchanged or exhibited a slight increase. Seasonal
changes in alder tree parts depended on the site examined. The relationship
among component parts was essentially consistent across species and collecting
sites in the summer. The
radiocesium concentrations in order of rank were:
roots > leaves > stems. Species
differences in component-part radiocesium levels were dependent on the part
sampled and the collecting site examined. Mean
soil to plant-part concentration factors in summer ranged from 0.9 to 7.6, and
species means across leaves, stems, and roots averaged 2.1, 3.8, and 6.2 for
alder, willow, and myrtle trees, respectively.
SREL Reprint #0454
Garten, C.T., Jr., L.A. Briese, R.R. Sharitz, and J.B. Gentry. 1975. Seasonal variation in radiocesium concentrations in three tree species. p. 498-508. In Mineral Cycling in Southeastern Ecosystems, edited by F.G. Howell, J.B. Gentry, and M.H. Smith. ERDA Symposium Series. CONF 740513.