Comparative Toxicity of Water Soluble Fractions of Four Oils on the Growth of a Microalga
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Abstract
Toxic effects of water soluble fractions (WSF) of four different fuel oils on a microalga, Tetraselmis gracilis, were examined and compared. On applying different concentrations of WSF, a decrease in cell population was observed. Depending on different physico-chemical properties, the hydrocarbons showed different inhibitory effects on the growth of Tetraselmis gracilis. Petrol was the most toxic and produced inhibitory effects even at low concentrations while HDD and crude oil inhibited growth at higher concentrations. Kerosene did not appreciably alter the growth either at lower or higher concentrations. The increase in toxicity was attributed to the presence of aromatic hydrocarbons of medium to higher molecular weight and their chemical modifications. The experimental data has shown that different oils have different potential for environmental damage, depending on the types and concentration of soluble and dispersed hydrocarbon present in the WSF.
Copyright (c)2000 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Seasonal Dynamics of Macroalgal Communities of the Northern Florida Reef Tract
- Marine Red Algae from the North Coast of Papua New Guinea
- Taxonomic Notes on Marine Algae from Malaysia. III. Seven Species of Rhodophyceae
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- The Distribution and Abundance of Mangrove Macroalgae in Woolooware Bay, New South Wales, Australia
- Fungi on Juncus roemerianus 14. Three New Coelomycetes, including Floricola, anam.-gen. nov.
- Chemical Characterization of Acetyl Fucoidan and Alginate from Commercially Cultured Cladosiphon okamuranus
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