Biological and chemical evaluation of sewage water pollution in the Rietvlei nature reserve wetland area, South Africa

被引：43

作者：

Oberholster, P. J. ^{[1
]}

Botha, A. -M. ^{[2
]}

Cloete, T. E. ^{[3
]}

机构：

[1] CSIR Nat Resources & Environm, ZA-0001 Pretoria, South Africa

[2] Univ Pretoria, Dept Genet, ZA-002 Pretoria, South Africa

[3] Univ Pretoria, Dept Microbiol & Plant Pathol, ZA-002 Pretoria, South Africa

来源：

ENVIRONMENTAL POLLUTION | 2008年 / 156卷 / 01期

关键词：

Treated sewage discharge; Peat bog; AUSRIVAS; Multitrophic level bioassay;

D O I：

10.1016/j.envpol.2007.12.028

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Macroinvertebrate communities in Rietvlei nature reserve wetland area and their relationship with water quality were studied with the aim to evaluate their use as potential indicators of pollution. Sampling locations were selected to include outlets from swage effluent, agricultural and informal residential runoff. A large increase in nutrient concentrations was observed downstream from discharged treated sewage with an associated decrease in species richness. Bioassays performed included: Daphnia magna, Hydra attenuate, Lactuca sativa, Allium cepa and Pyxicephalus adspersus. The highest percentage of lethality response to a screen (100% concentration) of sampled wetland water by test specimens were observed at the point source input of the Hartbeespoort treated sewage plant. Data generated from the AUSRIVAS method and multitrophic level bioassays revealed the deterioration of the wetland possibly due to factors such as increasing urbanization, industrialization, agriculture runoff and rapid human settlement in the Hennops River catchment area and its principal tributaries. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：184 / 192

页数：9

共 25 条

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