Trace-element accumulation by Hygrohypnum ochraceum in the upper Rio Grande Basin, Colorado and New Mexico, USA†
作者： Lisa F. Carter , Stephen D. Porter
关键词: Water pollution 、 Aquatic plant 、 Water quality 、 Bryophyte 、 Moss 、 Trace element 、 Sediment 、 Ecology 、 Environmental chemistry 、 Environmental science 、 Tributary
摘要: Accumulation of 12 trace elements by transplanted aquatic bryophytes (Hygrohypnum ochraceum) was determined at 13 sites in the Rio Grande and tributary streams southern Colorado northern New Mexico as part US Geological Survey`s National Water-Quality Assessment Program. The purposes study were to determine spatial distribution relation land-use practices upper Basin, compare accumulation rates metals contaminated elements, evaluate a tool for examining bioavailability concentrations water bed sediment. Concentrations Cd, Cu, Pb, Zn bryophytes, water, sediment significantly higher that receive drainage from mining areas than near agricultural or urban activities. most lower stream below an source use. Cu correlated with In addition, bryophyte As, Pb Transplanted can provide indication bioavailability. Rates weremore » related magnitude ambient trace-element concentrations; maximal uptake occurred during first 10 d exposure. Trace-element could potentially be used predict represent integration conditions over short intermediate lengths time, rather instantaneous measured using samples.« less
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