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Effect of microbial seeding of crude oil in seawater in a model system |
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| Authors: | S Tagger A Bianchi M Julliard J Le Petit B Roux |
| Institution: | 1. Laboratoire de Microbiologie, Faculté des Sciences et Techniques de Saint-Jér?me, Université Aix-Marseille III, Rue H. Poincaré, 13397, Marseille Cedex 13, France 2. Laboratoire d'Ecologie et Biochimie Microbienne du Milieu Marin, CNRS ER, 223, Université de Provence, 3 Place Victor Hugo, 13331, Marseille Cedex 3, France 3. Laboratoire de Chimie Moléculaire, CNRS LA, 126, Faculté des Sciences et Techniques de Saint-Jér?me, Université Aix-Marseille III, Rue H. Poincaré, 13397, Marseille Cedex 13, France |
| Abstract: | The adding of a mixed culture of marine hydrocarbon-degrading bacteria to petroleum polluted seawater did not increase the hydrocarbon degradation capability of the water. All the strains of the mixed culture disappeared from the dominant microflora while the autochthonous bacteria showed a capacity for adaptation to petroleum degradation about four days after the oil spill. This confirms the advantage of natural bacterial communities. The oil spilled on the sea surface evolved very quickly under the influence of abiotic factors such as sunlight. Aromatic petroleum fractions were oxidized and polymerized. This chemical evolution causes a drastic decrease of the biodegradability of crude oil. |
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