High bacterial biodiversity increases degradation performance of hydrocarbons during bioremediation of contaminated harbor marine sediments

作者：Dell'Anno Antonio^*; Beolchini Francesca; Rocchetti Laura; Luna Gian Marco; Danavaro Roberto

来源：Environmental Pollution, 2012, 167: 85-92.

DOI：10.1016/j.envpol.2012.03.043

• Marine sediments
• Bioremediation
• Facilitative interactions
• Hydrocarbons

We investigated changes of bacterial abundance and biodiversity during bioremediation experiments carried out on oxic and anoxic marine harbor sediments contaminated with hydrocarbon;. Oxic sediments, supplied with inorganic nutrients, were incubated in aerobic conditions at 20 degrees C and 35 degrees C for 30 days, whereas anoxic sediments, amended with organic substrates, were incubated in anaerobic conditions at the same temperatures for 60 days. Results reported here indicate that temperature exerted the main effect on bacterial abundance, diversity and assemblage composition. At higher temperature bacterial diversity and evenness increased significantly in aerobic conditions, whilst decreased in anaerobic conditions. In both aerobic and anaerobic conditions, biodegradation efficiencies of hydrocarbons were significantly and positively related with bacterial richness and evenness. Overall results presented here suggest that bioremediation strategies, which can sustain high levels of bacterial diversity rather than the selection of specific taxa, may significantly increase the efficiency of hydrocarbon degradation in contaminated marine sediments.

• 出版日期2012-8