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Title: The influence of zinc sulphate solution on the fauna of chalk stream channels
Author: H. Casey
Author: M. Ladle
Document Type: Monograph
Zinc Sulphate is widely used by watercress farmers to control the incidence of the fungal disease "crook root". Crook root has an adverse effect on the production of watercress. A solution of zinc sulphate is dripped or sprayed into the water flowing into watercress beds for a period of several months from autumn to spring. The objective of the application is usually to achieve a concentration of about 0.1 mg/l of zinc at the outflow from the watercress beds. There is usually a substantial dilution of the effluent concentration when it subsequently enters the receiving stream. It has been suggested that zinc, a heavy metal which is toxic in high concentrations could be having an adverse effect on stream fauna, notably on the amphipod Gammarus pulex. The present study is a simple experiment designed to detect any gross short term effects of zinc sulphate solution on chalk stream invertebrates and invertebrate communities.
Publisher: Freshwater Biological Association
Publication Date: 1987
Publication Place: Dorset
Subject Keywords: Zinc sulphateToxicityChalk streamsAquatic plantsSpectrometryChemical compoundsBiological analysisExperimentationMortality
Geographic Keywords: EnglandFrome
Taxonomic Keywords: Nasturtium officinaleGammarus pulex
Extent: 14; + appendix
Total file downloads: 206

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