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- W1974804594 abstract "The world's largest open ore roasting bed operated at O'Donnell, near Sudbury from 1915 to 1929. It processed the sulphur-rich, copper—nickel ores of the Canadian Copper Company prior to smelting. By the time it was closed, the ground level fumigations of sulphur dioxide had devastated vegetation for miles around. Sixty-six years later, the roast bed itself is still almost devoid of vegetation. However, recolonization and recovery elsewhere has allowed a forest, albeit unusual in species composition, to grow almost to the edge of the roast bed. The primary colonizers are metal-tolerant grasses, sedges and mosses. The surface soils of the recovered forest are still strongly acidic, as is the roast bed itself (pH 3.89–4.2). Concentrations of nickel and copper in the roast bed still exceed several thousand μg/g, while several hundred μg/g Ni and Cu occur in surface forest soils to 300 m from the roast bed edge. Plant biodiversity increases substantially away from the roast bed and a clear zonation occurs from mosses and grasses through dwarf shrubs, to white birch trees. This recovery forest is different to that of forests in the area not affected by these ground level fumigations. In the soil, copper has been better retained relative to nickel and cobalt. Despite a recovery period of 66 years, the rates of microbial decomposition of litter in the forest around the roast bed are still inhibited." @default.
- W1974804594 created "2016-06-24" @default.
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- W1974804594 date "1997-04-01" @default.
- W1974804594 modified "2023-09-25" @default.
- W1974804594 title "Persistence of metal stress in a forested ecosystem near Sudbury, 66 years after closure of the O'Donnell roast bed" @default.
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- W1974804594 doi "https://doi.org/10.1016/s0375-6742(96)00067-2" @default.
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