Abstract
Concentrations of metals including manganese, nickel, copper and zinc were measured in soil from a copper mine spoil heap in the Grand Canyon, Arizona, and in three plant species growing on the spoil. The soil had high concentrations of available copper and zinc, and the herbaceous perennial Thlaspi montanum var fendleri contained amounts of Ni, Cu and Zn in direct proportion to the soil concentrations (EDTA extractable). Another herbaceous perennial, Phlox austromontana, and the woody perennial Juniperus osteosperma had considerably lower amounts of these elements. These findings are discussed in relation to other studies, and it is suggested that figures for metal accumulation by plants should always be related to plantavailable soil concentrations.
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