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- W100158643 abstract "The objective of this investigation was to assess the usefulness of the colonisation sampler (S.Auf.U) in collecting macro-invertebrates indicative of river water quality in lowland rivers which have proved difficult to monitor by direct biological sampling methods. The validity of applying different biotic and diversity indices was also examined. S.Auf.U. were immersed for one month periods at 24 sites on 14 different rivers for which regular physio-chemical data were available from the respective Water Authorities. The macro-invertebrate species and their relative abundance collected on the S.Auf.U. from the different sites were clearly related to the water quality. Heavy metal pollution was reflected by a reduction in the numbers of Gastropods and bivalve molluscs. Increasing organic pollution was reflected by a decline in the Gammarus/Asellus ratio and by a reduction in numbers of Potamopyrgus jenkinsi and the Polycentropidae. The numbers of Erpobdellidae increased with increasing organic pollution.None of six indices calculated adequately represented these differences in macro-invertebrate assemblages over the whole range of water quality.It is concluded that colonisation samplers could be used to advantage in water quality monitoring in lowland rivers. However indices currently in use are not appropriate for presenting the data. Instead it is recommended that the data be summarized in the form of a taxa-relative abundance list based on 18 taxa." @default.
- W100158643 created "2016-06-24" @default.
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- W100158643 date "1984-01-01" @default.
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- W100158643 title "THE PERFORMANCE OF AN INVERTEBRATE COLONISATION SAMPLER (S. Auf.U.) IN BIOLOGICAL SURVEILLANCE OF LOWLAND RIVERS" @default.
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- W100158643 doi "https://doi.org/10.1016/b978-0-08-032313-8.50006-1" @default.
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