Effects of sludge filtrate on the survival and reproduction of Ceriodaphnia dubia
Ecotoxicology
By: S.S. Veerina, N. C. Parker, and C.B. Fedler
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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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effects of sludge filtrate on the survival and reproduction of Ceriodaphnia dubia |
| Series title | Ecotoxicology |
| DOI | 10.1023/A:1014421028502 |
| Volume | 11 |
| Issue | 2 |
| Year Published | 2002 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Ecotoxicology |
| First page | 113 |
| Last page | 118 |
| Google Analytic Metrics | Metrics page |