Evolution des hydrocarbures,des peuplements bacteriens et microphytiques dans les sediments des marais maritimes de l'iie grande pollues par l'amoco cadiz: 1, evolution des hydrocarbures et des bacteries |
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| Authors: | Gilbert Mille Yan Yu Chen Gérard Giusti Henri Dou Evelyne Vacelet Marie-Reine Plante-Cuny |
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| Institution: | Centre de Spectrométrie Moléculaire et L.A., 126 de Chimie Moléculaire et de Pétroléochimie, Faculté des Sciences et Techniques de St Jérome, 13397 Marseille Cédex 13, France;2 Station Marine d''Endoume et Centre d''Océanographie, rue de la Batterie des Lions, 13007 Marseille, France |
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| Abstract: | The evolution of hydrocarbons in sediments was studied from 1978 to 1980 at eight stations in the Ile Grande marshes (Brittany) polluted by the Amoco Cadiz oil spill. Generally, in 1980 (except for one heavily polluted site) the amounts of hydrocarbons were found to be far less important than in 1978 and sometimes biogenic hydrocarbons were found. In the superficial layer of the sediments biodegradation processes were generally important with the preferential degradation of n-alkanes. On the other hand, aromatic hydrocarbons seem not to have been altered after three years. Degradation of percolated hydrocarbons proceeds more slowly than in the surface layer. The number of degrading bacteria decreases when n-alkanes disappear. |
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