期刊
MARINE POLLUTION BULLETIN
卷 60, 期 2, 页码 299-302出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2009.11.019
关键词
Ballast water; Mid-ocean exchange; Bacteria community; Denaturing gradient gel electrophoresis (DGGE)
资金
- Ministry of the Environment, Japan [D-4, D-72]
Ships carry ballast water for better stability and to control trim. However, the discharge of ballast water near ports is known to transport invasive species from one coastal area to another. The exchange of ballast water on the high seas is supposed to reduce such invasions of exotic species. In this study, we used denaturing gradient gel electrophoresis (DGGE) to analyze the composition of the bacterial community in ballast water before and after such a mid-ocean exchange, and we also measured total bacterial counts. Our findings confirmed that the ballast water was replaced by the mid-ocean exchange, as indicated by the marked change in the composition of the bacterial community. There was also a significant decrease in bacterial abundance after the mid-ocean exchange. Finally, our findings support the incubation hypothesis, because the composition of the bacterial communities changed over time within the same ballast water. (C) 2009 Elsevier Ltd. All rights reserved.
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