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Microbial Ecology

, Volume 52, Issue 1, pp 19–25 | Cite as

Degradation of Tributyltin in Microcosm Using Mekong River Sediment

  • Fujiyo Suehiro
  • Takeshi Kobayashi
  • Lisa Nonaka
  • Bui Cach Tuyen
  • Satoru SuzukiEmail author
Article

Abstract

The degradation of tributyltin (TBT) and changes of bacterial number and community structures were investigated in microcosms using the sediment collected from the Mekong River, Vietnam. Concentrations of TBT in sediments were less than 0.62 ng/g (dry wt), lower than those reported from other areas. TBT-resistant bacteria were found in the three sampling sites, and the occurrence rates were 11–16% out of the total viable count. In this microcosm experiment, initial concentration of TBT [1.0–1.4 μg/g (dry wt)] decreased to 0.6 μg/g (dry wt) during 150 days, whereas that in the control microcosm with autoclaved sediment did not change, indicating that Mekong River sediment contains high TBT-degrading activity by microorganisms. The occurrence of TBT-resistant bacteria and the bacterial community structures monitored by denaturing gradient gel electrophoresis were almost the same between test and control groups, indicating that the addition of TBT had little influence on microbial community structure. Mekong River sediment seems to have a stable microbial community against TBT pollution.

Keywords

Microbial Community Structure Bacterial Community Structure Tributyltin Mekong Delta Multidrug Efflux Pump 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was partly supported by Research Revolution (RR2002) and 21st Century COE Programs, from the Ministry of Education, Culture, Science, Sports and Technology (MEXT), Japan, and Grants-in-Aid for Scientific Research (14208063, 15201006) from the Japanese Society of Promotion of Science (JSPS).

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Fujiyo Suehiro
    • 1
  • Takeshi Kobayashi
    • 1
  • Lisa Nonaka
    • 1
  • Bui Cach Tuyen
    • 2
  • Satoru Suzuki
    • 1
    Email author
  1. 1.Center for Marine Environmental Studies (CMES)Ehime UniversityEhimeJapan
  2. 2.Nong Lam UniversityHo Chi Minh City,Vietnam

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