| Abstract: | The objective of this study was to determine if the runoff from croplands fertilized with municipal sludge was toxic to aquatic biota and, therefore, a potential threat to either public health or the environment. Seven-day bioassays with Ceriodaphnia dubia showed that the No-Observed-Effect-Concentration (NOEC) was 24 g/L and the Lowest-Observed-Effect-Concentration (LOEC) for survival was 30 g/L for soil samples treated with 35.2 metric tonnes (MT)/ha of municipal sludge. For soil samples treated with 0 and 17.6 MT/ha of sludge, the survival rates of C. dubia were not significantly affected at concentrations of 6-30 g/L of soil. Reproduction was suppressed by 25% when daphnids were exposed to 3.3 g/L concentration of soil treated with sludge at 35.2 MT/ha. A 50% suppression of reproduction occurred when daphnids were exposed to 15 g/L concentration of soil treated with sludge at 17.6MT/ha. A sludge application rate of 17.6MT/ha suppressed reproduction at a treatment concentration of 18g/L. These data indicate that the runoff from agricultural lands treated with municipal sludge has the potential to affect reproduction in daphnids and, therefore, the environment through the aquatic food chain. |
| Genre: | Article |
| ProdID: | 70024828 |
| Citation Author: | Veerina, S. S.; Parker, N. C.; Fedler, C. B. |
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| Citation End Page: | 118 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ecotoxicology |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Effects of sludge filtrate on the survival and reproduction of Ceriodaphnia dubia; 2002; Article; Journal; Ecotoxicology; Veerina, S. S.; Parker, N. C.; Fedler, C. B. |
| Citation Start Page: | 113 |
| Citation Volume: | 11 |
| Citation Year: | 2002 |
| Type: | citation/reference |
| Text: | Effects of sludge filtrate on the survival and reproduction of Ceriodaphnia dubia; 2002; Article; Journal; Ecotoxicology; Veerina, S. S.; Parker, N. C.; Fedler, C. B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1023/A:1014421028502 |
| Date Other: | Tue, 1 Jan 2002 00:00 -0600 |
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