Toxicity of water and sediment from stormwater retarding basins to Hydra hexactinella

Rosenkranz, R, Pollino, C, Nugegoda, D and Baun, A 2008, 'Toxicity of water and sediment from stormwater retarding basins to Hydra hexactinella', Environmental Pollution, vol. 156, no. 3, pp. 922-927.


Document type: Journal Article
Collection: Journal Articles

Title Toxicity of water and sediment from stormwater retarding basins to Hydra hexactinella
Author(s) Rosenkranz, R
Pollino, C
Nugegoda, D
Baun, A
Year 2008
Journal name Environmental Pollution
Volume number 156
Issue number 3
Start page 922
End page 927
Total pages 6
Publisher Pergamon
Abstract Hydra hexactinella was used to assess the toxicity of stormwater and sediment samples from three retarding basins in Melbourne, Australia, using an acute test, a sublethal test, and a pulse test. Stormwater from the Avoca St retarding basins resulted in a LC50 of 613 ml/L, NOEC and LOEC values of 50 ml/L and 100 ml/L, while the 7 h pulse exposure caused a significant increase in the mean population growth rate compared to the control. Water samples from the two other retarding basins were found non-toxic to H. hexactinella. This is the first study to employ sediment tests with Hydra spp. on stormwater sediments and a lower population growth rate was observed for organisms exposed to sediment from the Avoca St retarding basins. The behavioral study showed that H. hexactinella tended to avoid the sediment-water interface when exposed to sediment from all retarding basins, compared to the reference sediment. Further work is needed to determine the long-term effects of stormwater polluted sediments and acute effects due to organism exposure to short-term high concentrations during rain events.
Subject Environmental Impact Assessment
Keyword(s) stormwater
Hydra hexactinella
retarding basins
sediment
toxicity
DOI - identifier 10.1016/j.envpol.2008.05.013
ISSN 0269-7491
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