Responses of a submersed aquatic plant and periphyton to a nonionic surfactant in model stream mesocosm exposures
- Univ. of Mississippi, University, MS (United States). Dept. of Biology
- Shell Development Co., Houston, TX (United States)
The effects of a nonionic linear alcohol ethoxylate (LAE) surfactant (with an average of 12.8 carbons per chain length and an average of 7.0 ethylene oxide units/mole) on Myriophyllum aquaticum L. and periphyton were evaluated in 30 day exposures in twelve model stream mesocosms. Effects evaluated included: chlorophyll a, pheophytin a, biomass, and membrane integrity for M. aquaticum, and chlorophyll a, pheophytin a, and biomass for periphyton. Average measured concentrations of LAE for replicate streams were 0.32, 0.88, 1.98, and 5.2 mg LAE/L with two untreated controls. During the 30 days exposure in the model stream mesocosms, no significant differences were observed among treatments and controls, and the estimated LOEC and NOEC for M. aquaticum and periphyton for all parameters measured was > 5.2 mg LAE/L. Based on the results of this study, M. aquaticum and periphyton were relatively insensitive to this (LAE) surfactant when compared with effects observed on fish and macroinvertebrates. These results are similar to those obtained in two previous experimental stream studies with other AE homologs.
- OSTI ID:
- 390190
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9646%%475
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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