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Relative Absorption of Strontium and Calcium by Certain Algae¹

ABSTRACT

The relative uptake of strontium and calcium was compared, using seven different species of algae (A. falcolus var. aci cularis, Scenedesmus, sp., Pediastrum sp., Sphaerocystis sp., Phormidium sp., Nostoc sd., and Anabaena sp.,) isolated from fresh water and arid land. Uptake always fovored calcium over strontium when the two elements were present in nutrient media together. Strontium was absorbed in addition to the calcium requirement. With Scenedemus sp., however, strontium actually appeared to compete with calcium.

¹ Contribution from the Dep. of Agr. Chem. and Soils, Univ. of Arizona Exp. Sta., Tucson, Paper No. 1157. Presented before Western Soil Sci. Soc., Seattle, Wash., June 1966. This research was supported in part by the US Atomic Energy Comm. on Contract No. AT(11-1)947.

² Professor and Head of Department, and Research Associate, respectively, Dep. of Agr. Chem. and Soils, Univ. of Arizona, Tucson.

Received for publication March 17, 1967. Accepted for publication July 31, 1967.