The development of a toxicity database using freshwater macroinvertebrates and its application to South African water resource protection.

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Show simple item record Palmer Carolyn en_US Muller Wilhelmina en_US Gordon Andrew en_US Scherman Patrica en_US Pakhomova L en_US De Kock E en_US Davies-Coleman Heather en_US 2009-06-26T04:22:43Z 2009-06-26T04:22:43Z 2004 en_US
dc.identifier 2006007725 en_US
dc.identifier.citation Palmer Carolyn et al. 2004, 'The development of a toxicity database using freshwater macroinvertebrates, and its application to the protection of South African water resources', F R D, vol. 100, no. NA, pp. 643-650. en_US
dc.identifier.issn 0038-2353 en_US
dc.identifier.other C1 en_US
dc.description.abstract There is a growing international trend towards the protection of freshwater resources from pollution by imposing instream guidelines and specified waste-discharge conditions. Current methods for devising freshwater quality guidelines are based on species sensitivity distributions (SSDs) that are used to identify pollutant concentrations, ensuring the protection of a modelled percentage of species (95% protection is a common goal). SSDs are derived from the toxicity test results of as many taxa as possible for each polluting substance. Waste-discharge licences can be for single substances, specified in terms of chemical concentrations, and derived in conjunction with instream guidelines; or for complex mixtures, specified in terms of toxic units. In both cases toxicity test results are the core data used. The emphasis on SSDs calls into question the species constituting the test populations. It is likely that SSDs based in part on the responses of local organisms will achieve superior site-specific ecological protection. Until the early 1990s, there were very few data on the tolerances of South African freshwater organisms. In the intervening decade, the Unilever Centre for Environmental Water Quality at Rhodes University has developed a toxicity database that, to date, records the responses of 21 South African freshwater taxa to 26 single-substance pollutants or mixtures. This is the most comprehensive database of South African toxicity responses available and has been used in the drawing up of methods and guidelines to protect water resources. This paper aims to make these data available and to describe applications of the data using selected case studies. en_US
dc.publisher South African Association for the Advancement of Science en_US
dc.relation.isbasedon NA en_US
dc.title The development of a toxicity database using freshwater macroinvertebrates and its application to South African water resource protection. en_US
dc.parent South African Journal of Science en_US
dc.journal.volume 100 en_US
dc.journal.number NA en_US
dc.publocation South Africa en_US
dc.identifier.startpage 643 en_US
dc.identifier.endpage 650 en_US DVCRch.Institute for Water and Environmental Resource Mgmnt en_US
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10

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