Search Results for: Metallised yarn combined with metal
elevated levels of copper, zinc, lead and cadmium resulting from leakage from old mine deposits. species richness at undisturbed sites was positively related to the size of the catchment, ph, channel width, calcium concentration and the proportion of deciduous trees in the riparian zone. in streams with
elevated metal concentrations, we found reductions in taxonomic richness for total macroinvertebrates, mayflies, stoneflies and combined ept (ephemeroptera, plecoptera and trichoptera), but not for that of trichoptera nor total abundance or biomass. copper and zinc were those metals showing strongest...
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