Vertical Distribution of Archaea in Mud Wedge Sediments Located at Inner Continental Shelf of the East China Sea
ZHANG Lin-bao
LI Tie-gang
DANG Hong-yue
SAREN Gao-wa
ZHANG Wei
Abstract：, Archaeal 16S rDNA clone libraries were constructed from sediments of different depths to elucidate the distribution and diversity of archaea in the Fujian and Zhejiang coastal mud wedge of the inner continental shelf of the East China Sea. We obtained 473 useable clones and 50 different OTUs (Otional Taxonomic Units). Phylogenetic and statistic analysis of clone libraries show that, archaeal 16S rDNA sequences are within phylums of Crenarchaeota and Euryarchaeota, respectively. The majority of archaeal phylotypes are Miscellaneous Crenarchaeotic Group (MCG), whereas few sequences fall into Marine Benthic Group B (MBCrB),SOuth African Gold Mine Euryarchaeotic Group (SAGMEG), Anaerobic Methanotrophs 3 (ANME-3), Marine Crenarchaeotic Group I (MG-I) and Marine Benthic Group D (MEG-D). There might be anaerobic oxidation of methane carried out by group ANME-3 in the mud wedge.Homologous sequence analyses show that the distribution of archaea in the mud wedge is related to the surrounding enviroranent. UniFrac analysis and .sediment environmental parameters indicate that the vertical distribution of archaea closely coincides with the variation of sediment total organic carbon content and grain size.
Keywords：inner continental shelf the East China Seamud wedgearchaealvertical distributionbiodiversity.
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 254-260 )