期刊
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
卷 58, 期 10, 页码 1040-1048出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr.2011.07.003
关键词
Deep hypersaline anoxic basin; Kinetoplastids; RNA; FISH; E. Mediterranean; Brine
类别
资金
- NSF [OCE-0849578]
- Deutsche Forschungsgemeinschaft (DFG) [STO414/3-1, STO414/7-1]
- Division Of Ocean Sciences
- Directorate For Geosciences [0849578] Funding Source: National Science Foundation
The combination of nearly saturated salt concentration and corresponding high density, high hydrostatic pressure, absence of light, anoxia, and a sharp chemocline make the deep hypersaline anoxic basins in the Eastern Mediterranean Sea some of the most polyextreme habitats on Earth. Using kinetoplastid-specific primers, we detected kinetoplastid flagellates in some of the harshest deep-sea environments known to date, including some whose small subunit ribosomal RNA gene sequences are not closely related to cultured representatives. Kinetoplastids, including presumably novel representatives appear to be specialists of halocline environments in the Eastern Mediterranean, and to comprise a significant fraction of the protist communities in the brines and haloclines of several basins. Fluorescent in situ hybridization data indicate a novel 'unidentified' sequence clade of kinetoplastids related to bodonids represents as much as 10% of the total protist community in the Discovery Basin halocline. Different kinetoplastid groups are unevenly represented in the different basins and habitats we sampled, which we discuss as a result of environmental selection. (C) 2011 Elsevier Ltd. All rights reserved.
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