Seasonal and spatial patterns of metals at a restored copper mine site II. Copper in riparian soils and Bromus carinatus shoots [An article from: Environmental Pollution]

This digital document is a journal article from Environmental Pollution, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Soil and plants were sampled throughout winter and spring near a perennial stream traversing a restored mine site in a winter-rainy climate. Within 1m of an acidic reach of the stream, soil had pH 3-5 and 50-100@mg/g ''bioavailable'' copper (extractable with 0.01M CaCl"2). Soil 2-3m from the stream had pH 5-8 and lower (less than 3@mg/g) bioavailable copper. ''Oxide-bound'' copper (extractable with 2N HCl) was 50-100@mg/g at most locations. Copper concentrations in the shoots of field-collected Bromus carinatus declined from 20@mg/g in winter to 2@mg/g in spring at all sampling sites. A similar temporal pattern was found in plants grown under controlled conditions. Thus B. carinatus has a developmental program for control of shoot copper concentration, causing a seasonally-varying pattern of copper phytoaccumulation over a large range of copper availability in the soil.