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Toxicity of sewage-contaminated sediment cores to macrocystis pyrifera (Laminariales, Phaeophyta) gametophytes determined by digital image analysis

James, David E. and Stull, Janet K. and North, Wheeler J. (1990) Toxicity of sewage-contaminated sediment cores to macrocystis pyrifera (Laminariales, Phaeophyta) gametophytes determined by digital image analysis. In: Thirteenth International Seaweed Symposium. Developments in Hydrobiology. No.58. Springer Netherlands , Dordrecht, pp. 483-489. ISBN 9789401074193.

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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 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(ll), 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.

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Additional Information:© Kluwer Academic Publishers 1990. These studies were supported by grants from the W. M. Keck Foundation and the William and Flora Hewlett Foundation. Image digitization software was written by Timothy K. Horiuchi. Sediment sampling and chemical analysis by staff at the Los Angeles County Sanitation Districts is gratefully acknowledged.
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
William and Flora Hewlett FoundationUNSPECIFIED
Subject Keywords:gametophyte, image analysis, Macrocystis, sediments, sewage, toxicity
Series Name:Developments in Hydrobiology
Issue or Number:58
Record Number:CaltechAUTHORS:20201111-190742127
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106634
Deposited By: Rebecca Minjarez
Deposited On:16 Nov 2020 21:39
Last Modified:16 Nov 2021 18:55

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