Predominant growth of Alcanivorax strains in oil-contaminated and nutrient-supplemented sea water |
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Authors: | Kasai Yuki Kishira Hideo Sasaki Tetsuya Syutsubo Kazuaki Watanabe Kazuya Harayama Shigeaki |
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Institution: | Marine Biotechnology Institute, 3-75-1 Heita, Kamaishi, Iwate 026-0001, Japan. |
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Abstract: | We found that bacteria closely related to Alcanivorax became a dominant bacterial population in petroleum-contaminated sea water when nitrogen and phosphorus nutrients were supplied in adequate quantity. The predominance of Alcanivorax bacteria was demonstrated under three experimental conditions: (i) in batch cultures of sea water containing heavy oil; (ii) in columns packed with oil-coated gravel undergoing a continuous sea water flow; and (iii) in a large-scale tidal flux reactor that mimics a beach undergoing tidal cycles with fresh sea water. These results suggest that bacteria related to Alcanivorax are major players in the bioremediation of oil-contaminated marine environments. |
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