Evol Ecol Res 17: 125-140 (2016)     Full PDF if your library subscribes.

Micro-eukaryotic diversity
in the surface layer of sediments from the East China Sea

Ran Jiang*, Jian-Xin Wang*, Kai-Cheng Yu, Ming-Hua Liu, Ge Shi and Xue-Zhu Liu

Marine Microorganism Ecological and Application Lab, Zhejiang Ocean University, Zhejiang, China

Correspondence: Jian-Xin Wang or Xue-Zhu Liu, Marine Microorganism Ecological and Application Lab, Zhejiang Ocean University, Number 1 South Haida Road, Zhejiang 316022, China.
e-mail: jxwang@zjou.edu.cn or xuem07@163.com


Question: What is the micro-eukaryotic diversity in the surface layer of sediments from the East China Sea?

Methods: We sequenced 332 clones from surface sediments at three different sites, and then selected 129 representative phylotypes for phylogenetic analysis. We used culture-independent molecular approaches based on 18S rRNA genes to investigate the diversity. We also used redundancy analysis to determine the relationship between sediment microbial community diversity and environmental parameters.

Results: Protists were highly diverse. Most clone sequences were affiliated to protists (72.6%), dominated by Alveolata (57.2%) and Rhizaria (12.0%). The other clone sequences belonged to Metazoa (17.6%), Stramenopiles (3.4%), fungi (2.6%), Apusozoa (2.1%) and ‘unclassified’ (1.7%). A number of the clones were related to anoxic environment clones or polar region clones. Redundancy analysis showed that some environmental parameters had a marked effect on the sediment microbial community diversity.

Keywords: marine sediment, micro-eukaryotic, RDA, 18S rRNA.

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