Authors: Jinquan Chen Fengping Wang Lijing Jiang Xijie Yin Xiang Xiao
Publish Date: 2013/02/13
Volume: 67, Issue: 1, Pages: 41-50
Abstract
Marine subsurface sediments represent a novel archaeal biosphere with unknown physiology To get to know the composition and ecological roles of the archaeal communities within the sediments of the Pearl River Estuary Southern China the diversity and vertical distribution of active archaea in a sediment core were characterized by 16S rRNA phylogenetic analysis of clone libraries derived from RNA In this study the archaeal diversity above within and beneath the sulfatemethane transition zone SMTZ in the Pearl River Estuary sediment core was described The majority of the clones obtained from the metabolically active fraction of the archaeal community were most closely related to miscellaneous crenarchaeotal group and terrestrial miscellaneous euryarchaeotal group Notably although the Pearl River Estuary sediment belong to high methane and high organic carbon environment sequences affiliated with methanotrophic and methanogenic archaea were detected as minor group in 16S rRNA clone libraries No obvious evidence suggested that these unknown archaeal phylotypes related directly to anaerobic oxidation of methane in SMTZ This is the first phylogenetic analysis of the metabolically active fraction of the archaeal community in the coastal sediment environmentsThis study has been partly supported by the Natural Science Foundation of China Grant Number 51168046 the National HighTech Program 2007AA091904 COMRA fund DYXM11502201 Additional supports were provided by grants from the Third Institute of Oceanography State Oceanic Administration and from the State Key Laboratory of Marine Geology Tongji University
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