秋田県の珪藻4―小坂川の重金属精錬所排水が流入する地点の珪藻と水質
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概要
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Diatom assemblages and water quality were investigated at a site in the Kosaka River into which drainage flows from a non-ferrous metal refinery. At the site electrical conductivity was 1,529 μS/cm and the concentrations of inorganic nitrogen, copper, and zinc were 5.11 mg/L, 14 μg/L, and 130 μg/L, respectively. Only five diatom taxa were recorded; dominant and subdominant species were Achnanthidium minutissimum (88%) and Cyclostephanos fritzii (11%), respectively. A. minutissimum has a special copper-resistance mechanism and is an indicator species of heavy metal-polluted rivers, while the heavy metal tolerance of the other four taxa has never been reported.
- 日本珪藻学会の論文
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