Abstract
Macrocystis pyrifera gametophytes were exposed in batch culture to varying mass concentrations of buried, sewage-contaminated, historically discharged sediment that had been sampled from two sites off Palos Verdes Peninsula, California. Significant gametophytic vegetative growth inhibition was detected in six days, using digital image analysis at sediment loadings ranging from 0.15 to 14.5 g in 500 mL nutrient-enriched seawater. Inhibition declined at low sediment loadings and increased at high loadings as cultures aged. Sediments corresponding to the historic emissions peak taken 2 km from the Joint Water Pollution Control Plant outfall inhibited vegetative growth more than did sediments sampled 13 km distant. Analysis showed elevated aqueous Cd(II), Cr(II) and p,p’-DDE concentrations in high sediment-loading culture medium. Inhibition by Zn(II) alone was observed at similar concentrations in other experiments, but synergism or antagonism by other toxicants remains possible.
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James, D.E., Stull, J.K., North, W.J. (1990). Toxicity of sewage-contaminated sediment cores to Macrocystis pyrifera (Laminariales, Phaeophyta) gametophytes determined by digital image analysis. In: Lindstrom, S.C., Gabrielson, P.W. (eds) Thirteenth International Seaweed Symposium. Developments in Hydrobiology, vol 58. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2049-1_69
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DOI: https://doi.org/10.1007/978-94-009-2049-1_69
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