Toxicity of sewage-contaminated sediment cores toMacrocystis pyrifera(Laminariales, Phaeophyta) gametophytes determined by digital image analysis
✍ Scribed by David E. James; Janet K. Stull; Wheeler J. North
- Book ID
- 104618586
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 499 KB
- Volume
- 204-205
- Category
- Article
- ISSN
- 1573-5141
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✦ Synopsis
Macrocystispyrifera 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 nutrientenriched 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 sedimentloading culture medium . Inhibition by Zn(II) alone was observed at similar concentrations in other experiments, but synergism or antagonism by other toxicants remains possible .