globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12233
Scopus记录号: 2-s2.0-85018639885
论文题名:
Eukaryotic diversity in late Pleistocene marine sediments around a shallow methane hydrate deposit in the Japan Sea
作者: Kouduka M.; Tanabe A.S.; Yamamoto S.; Yanagawa K.; Nakamura Y.; Akiba F.; Tomaru H.; Toju H.; Suzuki Y.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2017
卷: 15, 期:5
起始页码: 715
结束页码: 727
语种: 英语
Scopus关键词: cold seep ; diatom ; DNA ; eukaryote ; gas hydrate ; genetic analysis ; Last Glacial ; marine sediment ; methane ; plankton ; polymerase chain reaction ; radiolaria ; relatedness ; seagrass ; seaweed ; skeleton ; species diversity ; Pacific Ocean ; Sea of Japan ; Alnus ; Bacillariophyta ; Chaunacanthida ; Embryophyta ; Eukaryota ; Sargassum ; Thalassiosira ; Ulmus ; Zostera
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Marine sediments contain eukaryotic DNA deposited from overlying water columns. However, a large proportion of deposited eukaryotic DNA is aerobically biodegraded in shallow marine sediments. Cold seep sediments are often anaerobic near the sediment–water interface, so eukaryotic DNA in such sediments is expected to be preserved. We investigated deeply buried marine sediments in the Japan Sea, where a methane hydrate deposit is associated with cold seeps. Quantitative PCR analysis revealed the reproducible recovery of eukaryotic DNA in marine sediments at depths up to 31.0 m in the vicinity of the methane hydrate deposit. In contrast, the reproducible recovery of eukaryotic DNA was limited to a shallow depth (8.3 m) in marine sediments not adjacent to the methane hydrate deposit in the same area. Pyrosequencing of an 18S rRNA gene variable region generated 1,276–3,307 reads per sample, which was sufficient to cover the biodiversity based on rarefaction curves. Phylogenetic analysis revealed that most of the eukaryotic DNA originated from radiolarian genera of the class Chaunacanthida, which have SrSO4 skeletons, the sea grass genus Zostera, and the seaweed genus Sargassum. Eukaryotic DNA originating from other planktonic fauna and land plants was also detected. Diatom sequences closely related to Thalassiosira spp., indicative of cold climates, were obtained from sediments deposited during the last glacial period (MIS-2). Plant sequences of the genera Alnus, Micromonas, and Ulmus were found in sediments deposited during the warm interstadial period (MIS-3). These results suggest the long-term persistence of eukaryotic DNA from terrestrial and aquatic sources in marine sediments associated with cold seeps, and that the genetic information from eukaryotic DNA from deeply buried marine sediments associated with cold seeps can be used to reconstruct environments and ecosystems from the past. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85044
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Earth and Planetary Science, The University of Tokyo, Tokyo, Japan; Graduate School of Science, Kobe University, Kobe, Japan; Graduate School of Human Development and Environment, Kobe University, Kobe, Japan; Graduate School of Social and Cultural Studies, Kyushu University, Fukuoka, Japan; Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan; Diatom Minilab Akiba Ltd., Saitama, Japan; Department of Earth Sciences, Graduate School of Science, Chiba University, Chiba, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan

Recommended Citation:
Kouduka M.,Tanabe A.S.,Yamamoto S.,et al. Eukaryotic diversity in late Pleistocene marine sediments around a shallow methane hydrate deposit in the Japan Sea[J]. Geobiology,2017-01-01,15(5)
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