Abstract
1 School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, Seoul 151-742, Republic of Korea
2 Division of Life and Marine Sciences, Inha University, Incheon 402-751, Republic of Korea
3 Department of Environmental Sciences, University of California, Riverside, CA 92521, USA
4 Department of Microbiology, Oregon State University, Corvallis, OR 97331, USA