Microeukaryotic Diversity in Marine Environments, an Analysis of Surface Layer Sediments from the East Sea

Soo-Je Park; Byoung-Joon Park; Vinh Hoa Pham; Dae-No Yoon; Si-Kwan Kim; Sung-Keun Rhee

doi:10.1007/s12275-007-0237-x

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Microeukaryotic Diversity in Marine Environments, an Analysis of Surface Layer Sediments from the East Sea: Soo-Je Park ¹, Byoung-Joon Park ¹, Vinh Hoa Pham ¹, Dae-No Yoon ¹, Si-Kwan Kim ², Sung-Keun Rhee ¹; Journal of Microbiology 2008;46(3):244-249.
DOI: https://doi.org/10.1007/s12275-007-0237-x
Published online: July 5, 2008

¹Department of Microbiology, Chungbuk National University, Chungbuk 361-763, Republic of Korea, ²Department of Life Science, College of Biomedical and Health Science, Konkuk University, Chungbuk 380-701, Republic of Korea

Corresponding author: Sung-Keun Rhee , Tel: 82-43-261-2300,

Received: 4 December 2007 • Accepted: 11 March 2008

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Abstract

Molecular techniques, based on clone library of 18S rRNA gene, were employed to ascertain the diversity of microeukaryotic organisms in sediments from the East Sea. A total of 261 clones were recovered from surface sediments. Most of the clone sequences (90%) were affiliated with protists, dominated by Ciliates (18%) and Dinoflagellates (19%) of Alveolates, phototrophic Stramenopiles (11%), and Cercozoa (20%). Many of the clones were related to uncultivated eukaryotes clones retrieved from anoxic environments with several highly divergent 18S rRNA gene sequences. However, no clones were related to cultivated obligate anaerobic protists. Protistan communities between subsurface layers of 1 and 9 cm shared 23% of total phylotypes which comprised 64% of total clones retrieved. Analysis of diversity indices and rarefaction curve showed that the protistan community within the 1 cm layer exhibited higher diversity than the 9 cm layer. Our results imply that diverse protists remain to be uncovered within marine benthic environments.

Keywords: 18S rRNA;marine sediment;microeukaryotic

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Microeukaryotic Diversity in Marine Environments, an Analysis of Surface Layer Sediments from the East Sea

J. Microbiol. 2008;46(3):244-249. Published online July 5, 2008

DOI: https://doi.org/10.1007/s12275-007-0237-x

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