期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 52, 期 4, 页码 2278-2286出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b05367
关键词
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资金
- Dutch Technology Foundation TTW [13940]
- KWR
- IMARES
- NVVVA
- RIKILT
- Dutch Ministry of Infrastructure and the Environment
- Dutch Ministry of Health, Welfare and Sport
- Wageningen Food & Biobased Research
- STOWA
- RI -WA
Now that microplastics have been detected in lakes, rivers, and estuaries all over the globe, evaluating their effects on biota has become an urgent research priority. This is the first study that aims at determining the effect thresholds for a battery of six freshwater benthic macroinvertebrates with different species traits, using a wide range of microplastic concentrations. Standardized 28 days single species bioassays were performed under environmentally relevant exposure conditions using polystyrene microplastics (20-500 mu m) mixed with sediment at concentrations ranging from 0 to 40% sediment dry weight (dw). Microplastics caused no effects on the survival of Gammarus pulex, Hyalella azteca, Asellus aquaticus, Sphaerium corneum, and Tubifex spp. and no effects were found on the reproduction of Lumbriculus variegatus. No significant differences in growth were found for H. azteca, A. aquaticus, S. corneum, L. variegatus, and Tubifex spp. However, G. pulex showed a significant reduction in growth (EC10 = 1.07% sediment dw) and microplastic uptake was proportional with microplastic concentrations in sediment. These results indicate that although the risks of environmentally realistic concentrations of microplastics may be low, they still may affect the biodiversity and the functioning of aquatic communities which after all also depend on the sensitive species.
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