1. Low bacterial diversity and high labile organic matter concentrations in the sediments of the Medee deep-sea hypersaline anoxic basin.
- Author
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Akoumianaki I, Nomaki H, Pachiadaki M, Kormas KA, Kitazato H, and Tokuyama H
- Subjects
- Base Sequence, Biodiversity, DNA, Ribosomal genetics, Ecosystem, Mediterranean Sea, Molecular Sequence Data, Pseudomonas classification, Pseudomonas genetics, Pseudomonas isolation & purification, RNA, Ribosomal, 16S genetics, Salinity, Sequence Alignment, Sequence Analysis, DNA, Water Microbiology, Bacteria classification, Bacteria genetics, Bacteria isolation & purification, Geologic Sediments microbiology, Seawater microbiology
- Abstract
Studies in the center and margin of the Medee Basin, a Mediterranean deep-sea hypersaline anoxic basin, and at a reference site during Penelope cruise (2007), revealed the existence of a 7 m-thick halocline, with high salinity (328 psu), and high sedimentary organic carbon and biopolymer concentrations. The 194 16S rRNA sequences retrieved were grouped into 118 unique phylotypes. Pseudomonas gessardii, dominated in the center, while 33 phylotypes were detected at the margin and 73 at the reference site. The study suggested conditions hostile to bacteria in the sediments of the Medee Basin and preservation of sedimentary labile organic matter.
- Published
- 2012
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