Field assessments in conjunction with whole effluent toxicity testing

被引:8
|
作者
La Point, TW [1 ]
Waller, WT [1 ]
机构
[1] Univ N Texas, Inst Appl Sci, Denton, TX 76203 USA
关键词
biomonitoring; instream response; whole effluent toxicity; lab-to-field correspondence;
D O I
10.1002/etc.5620190103
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Whole effluent toxicity (WET) tests are widely used to assess potential effects of wastewater discharges on aquatic life. This paper represents a summary of chapters in a 1996 Society of Environmental Toxicology and Chemistry-sponsored workshop and a literature review concerning linkages between WET testing and associated field biomonitoring, Most published studies thus far focus primarily on benthic macroinvertebrates and an effluent-dominated stream systems in which effluents demonstrate little or no significant acute toxicity. Fewer studies examine WET test predictability in other aquatic ecosystcms (e.g., wetlands, estuaries, large rivers) or deal with instream biota such as fish and primary producers. Published results indicate that standards for the usual WET freshwater test species, Ceriodaphnia dubia and Pimephales promelas, may not always protect most of the species inhabiting a receiving stream. Although WET tests are useful in predicting aquatic individual responses, they are net meant to directly measure natural population or community responses. Further, they do not address bioconcentration or bioaccumulation of hydrophobic compounds: do not assess eutrophication effects in receiving systems; and lastly, do not reflect genotoxic effects or function to test for endocrine-disrupting chemicals. Consequently, a more direct evaluation of ecosystem health, using bioassessment techniques, may be needed to properly evaluate aquatic systems affected by wastewater discharges.
引用
收藏
页码:14 / 24
页数:11
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