Abstract
Abstract Mine and smelter wastes in S.W.England, containing high concentrations of arsenic and other elements have been investigated. Several soil profiles were examined in detail for water soluble and ‘total’ arsenic, copper and iron levels. Macroelement and pH values were also obtained. The spoil material was highly acidic, deficient in macro‐elements and contained elevated levels of arsenic and iron. Concentrations of water soluble extracts of both arsenic and iron increased markedly down the profile. The conditions have given rise to a specialized arsenic‐tolerant flora which is both impoverished and restricted. Plant cover is generally less than 1 per cent on the very toxic areas. Plants present on the sites include Agrostis tenuis, Agrostis stolonifera, Agrostis canina and Jasione montana. These species were found to accumulate arsenic to high concentrations which, in some cases, approached 1 per cent dry weight. Clonal material of A. tenuis and A. stolonifera from high arsenic sites exhibited toler...
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