Abstract An algicidal bacterium Pseudomonas fluorescens HYK0210-SK09 (SK09) was applied to a natural bloom of Stephanodiscus hantzschii using a small-scale mesocosm (SM) and a large-scale mesocosm (LM) to clarify the algicidal effects and evaluate the response
of the planktonic community and environments. When SK09 cells were inoculated at a final concentration of 5 × 106 cells mL−1, the abundance of S. hantzschii decreased significantly by 95% in SM and 85% in LM. The microcosm in the laboratory revealed that the abundance of Pseudomonas increased rapidly after inoculation with a corresponding decrease in the S. hantzschii population. Nutrient concentrations increased following the decline in the diatom cells. The abundances of nondominant species
such as Chlamydomonas, Cryptomonas, and Navicula increased slightly with increased nutrient concentrations. The abundance of heterotrophic protists also increased significantly
due to utilization of SK09 as food. The present study demonstrates that SK09 is an effective biocontrol agent for natural
S. hantzschii bloom, and grazing pressure plays a crucial role in the successful application of algicidal bacteria to natural environments.
of the planktonic community and environments. When SK09 cells were inoculated at a final concentration of 5 × 106 cells mL−1, the abundance of S. hantzschii decreased significantly by 95% in SM and 85% in LM. The microcosm in the laboratory revealed that the abundance of Pseudomonas increased rapidly after inoculation with a corresponding decrease in the S. hantzschii population. Nutrient concentrations increased following the decline in the diatom cells. The abundances of nondominant species
such as Chlamydomonas, Cryptomonas, and Navicula increased slightly with increased nutrient concentrations. The abundance of heterotrophic protists also increased significantly
due to utilization of SK09 as food. The present study demonstrates that SK09 is an effective biocontrol agent for natural
S. hantzschii bloom, and grazing pressure plays a crucial role in the successful application of algicidal bacteria to natural environments.
- Content Type Journal Article
- DOI 10.1007/s10811-009-9473-2
- Authors
- Seung Won Jung, Korea Ocean Research and Development Institute South Sea Institute Geoje 656-830 Republic of Korea
- Yoon-Ho Kang, Hanyang University Department of Life Science Seoul 133-791 Republic of Korea
- Toshiya Katano, Saga University Ariake Sea Research Project Saga 840-8502 Japan
- Baik-Ho Kim, Konkuk University Department of Environmental Science Seoul 143-701 Republic of Korea
- Soo-Yeon Cho, Hanyang University Department of Life Science Seoul 133-791 Republic of Korea
- Jin Hwan Lee, Sangmyung University Department of Life Science Seoul 110-743 Republic of Korea
- Young-Ok Kim, Korea Ocean Research and Development Institute South Sea Institute Geoje 656-830 Republic of Korea
- Myung-Soo Han, Hanyang University Department of Life Science Seoul 133-791 Republic of Korea
- Journal Journal of Applied Phycology
- Online ISSN 1573-5176
- Print ISSN 0921-8971
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