Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 430096
Title Pesticides in South African fresh waters
Author(s) Ansara-Ross, T.; Wepener, V.; Brink, P.J. van den; Ross, M.J.
Source African Journal of Aquatic Science 37 (2012)1. - ISSN 1608-5914 - p. 1 - 16.
Department(s) Aquatic Ecology and Water Quality Management
CWC - Environmental Risk Assessment
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) source insecticide pollution - ddt-sprayed area - lourens river - western-cape - azinphos-methyl - surface-water - oreochromis-mossambicus - risk-assessment - macroinvertebrate communities - fungicide carbendazim
Abstract Public concern has recently escalated over pesticide contamination of South African aquatic ecosystems. This review of published literature on the occurrence of pesticides within South African freshwater systems indicates that fewer than 50 studies of selected pesticides have been undertaken, with emphasis being on organochlorines. Extensive historical usage has led to the widespread persistence of selected organochlorines. Few studies have established linkages between pesticides, exposure pathways, environmental concentrations and the monitoring of toxicological effects on non-target organisms. Emphasis is now being placed on developing more field-relevant assessments, including microcosm and mesocosm studies, in situ bioassays and field studies. There are few data relating to the extent of exposure and effects of pesticides in South African aquatic environments, and thus further research is needed. Research should focus on multidisciplinary approaches that increase effective decisionmaking in data-poor circumstances. A pesticide risk assessment programme for aquatic ecosystems needs to be implemented in South Africa, which could feed into the National Toxicity Monitoring Programme. Preliminary risk assessment models should be used to detect pesticides posing possible or definite risks, whereafter more detailed chemical, toxicological and biological monitoring assessments should be performed if risks are predicted.
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