PMID: 9002432Jan 1, 1997Paper

Salinity tolerances of selected macroinvertebrates of the Sabie River, Kruger National Park, South Africa

Archives of Environmental Contamination and Toxicology
P Goetsch, C G Palmer

Abstract

Salinization has been identified as the most important problem facing the managers of South African freshwaters. Laboratory-based toxicity tests were conducted to assess the tolerance of selected macroinvertebrates to elevated salt concentrations. Since the Kruger National Park is the focus of river research in South Africa, and the Sabie River is the least mineralized river in the park, 96-h acute toxicity tests were conducted using Sabie River water and an ephemeropteran mayfly Tricorythus sp. found in the river. Experiments were conducted inflowing water systems known as raceways. The tolerance of the mayfly to two sodium salts, sodium chloride and sodium sulphate, was assessed at a range of selected conductivity levels/concentrations. The results indicated that mortality cannot be linked only to conductivity or total dissolved solid(TDS) concentrations, but also to the nature of the salt. Sodium sulphate was considerably more toxic to Tricorythus sp. than sodium chloride. Causes of mortality and implications for the development of water quality guidelines for the natural aquatic environment are discussed.

Citations

Sep 8, 2010·Environmental Toxicology and Chemistry·Rick A van DamAndrew J Harford
Apr 29, 2015·Environmental Toxicology and Chemistry·David J Soucek, Amy Dickinson
Apr 29, 2015·Environmental Pollution·Zenah W OrndorffMike Beck
Oct 26, 2005·Environmental Pollution·Ben J KeffordDayanthi Nugegoda
Jan 4, 2018·Environmental Toxicology and Chemistry·David J SoucekJ Russell Hockett
Jul 8, 2005·Archives of Environmental Contamination and Toxicology·A J KennedyC E Zipper
Dec 5, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·John K Jackson, David H Funk
Dec 5, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·C VenâncioI Lopes

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