NDLI: Vertical distribution of bacterial and archaeal communities along discrete layers of a deep-sea cold sediment sample at the East Pacific Rise (∼13°N)

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Vertical distribution of bacterial and archaeal communities along discrete layers of a deep-sea cold sediment sample at the East Pacific Rise (∼13°N)

Content Provider	Springer Nature Link
Author	Li, Youxun Li, Fuchao Zhang, Xiaowen Qin, Song Zeng, Zhigang Dang, Hongyue Qin, Yunshan
Copyright Year	2008
Abstract	The community structure and vertical distribution of prokaryotes in a deep-sea (ca. 3,191 m) cold sediment sample (ca. 43 cm long) collected at the East Pacific Rise (EPR) ∼13°N were studied with 16SrDNA-based molecular analyses. Total community DNA was extracted from each of four discrete layers EPRDS-1, -2, -3 and -4 (from top to bottom) and 16S rDNA were amplified by PCR. Cluster analysis of DGGE profiles revealed that the bacterial communities shifted sharply between EPRDS-1 and EPRDS-2 in similarity coefficient at merely 49%. Twenty-three sequences retrieved from DGGE bands fell into 11 groups based on BLAST and bootstrap analysis. The dominant groups in the bacterial communities were Chloroflexi, Gamma proteobacteria, Actinobacterium and unidentified bacteria, with their corresponding percentages varying along discrete layers. Pairwise Fst (F-statistics) values between the archaeal clone libraries indicated that the archaeal communities changed distinctly between EPRDS-2 and EPRDS-3. Sequences from the archaeal libraries were divided to eight groups. Crenarchaea Marine Group I (MGI) was prevalent in EPRDS-1 at 83%, while Uncultured Crenarchaea group II B (UCII B) abounded in EPRDS-4 at 61%. Our results revealed that the vertically stratified distribution of prokaryotic communities might be in response to the geochemical settings and suggested that the sampling area was influenced by hydrothermalism. The copresence of members related to hydrothermalism and cold deep-sea environments in the microbial community indicated that the area might be a transitional region from hydrothermal vents to cold deep-sea sediments.
Starting Page	573
Ending Page	585
Page Count	13
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	12
Issue Number	4
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2008-04-17
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	East Pacific Rise (EPR) Cold sediment Microbial diversity Vertical distribution Geochemical features Ecology Biotechnology Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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