title: Low bacterial diversity and high labile organic matter concentrations in the sediments of the Medee deep-sea hypersaline anoxic basin.
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.
authors.affiliation: Institute of Oceanography, Hellenic Centre for Marine Research, Anavissos 19013, Attiki, Greece.
authors.forename: Ioanna
authors.initials: I
authors.lastname: Akoumianaki
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Nomaki
authors.forename: Maria
authors.initials: M
authors.lastname: Pachiadaki
authors.forename: Konstantinos Ar
authors.initials: KA
authors.lastname: Kormas
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitazato
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Tokuyama
mesh_terms: D001419:Bacteria / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D001483:Base Sequence; D044822:Biodiversity; D004275:DNA, Ribosomal / Q000235:genetics; D017753:Ecosystem; D019015:Geologic Sediments / Q000382:microbiology*; D008522:Mediterranean Sea; D008969:Molecular Sequence Data; D011549:Pseudomonas / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D054712:Salinity; D012623:Seawater / Q000382:microbiology*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D014871:Water Microbiology
chemical_list: D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S