气候变化领域集成服务门户(CCPortal): Intact polar lipid composition and bottom water and surface sediment characteristics during R/V Pelagia cruise PASOM to the Arabian Sea in 2009

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.891253
	Intact polar lipid composition and bottom water and surface sediment characteristics during R/V Pelagia cruise PASOM to the Arabian Sea in 2009
	Besseling; Marc; Hopmans; Ellen C; Sinninghe Damsté; Jaap S; Villanueva; Laura
发布日期	2018-06-21
数据集类型	dataset
英文简介	Benthic Archaea comprise a significant part of the total prokaryotic biomass in marine sediments. Recent genomic surveys suggest they are largely involved in anaerobic processing of organic matter but the distribution and abundance of these archaeal groups is still largely unknown. Archaeal membrane lipids composed of isoprenoid diethers or tetraethers (glycerol dibiphytanyl glycerol tetraether, GDGT) are often used as archaeal biomarkers. Here, we compare the archaeal diversity and intact polar lipid (IPL) composition in both surface (0-0.5 cm) and subsurface (10-12 cm) sediments recovered within, just below, and well below the oxygen minimum zone (OMZ) of the Arabian Sea. Archaeal 16S rRNA gene amplicon sequencing revealed a predominance of Thaumarchaeota (Marine Group I, MG-I) in oxygenated sediments. Quantification of archaeal 16S rRNA and ammonia monoxygenase (amoA) of Thaumarchaeota genes and their transcripts indicated the presence of an active in situ benthic population, which coincided with a high relative abundance of hexose phosphohexose crenarchaeol, a specific biomarker for living Thaumarchaeota. On the other hand, anoxic surface sediments within the OMZ and all subsurface sediments were dominated by archaea belonging to the Miscellaneous Crenarchaeota Group (MCG), the Thermoplasmatales and archaea of the DPANN superphylum. Members of the MCG were diverse with a dominance of subgroup MCG-12 in anoxic surface sediments. This coincided with a high relative abundance of IPL GDGT-0 with an unknown polar head group. Subsurface anoxic sediments were characterized by higher relative abundance of GDGT-0, 2 and 3 with dihexose IPL-types, as well as GDGT-0 with a cyclopentanetetraol molecule and a hexose, as well as the presence of specific MCG subgroups, suggesting that these groups could be the biological sources of these archaeal lipids.
空间范围	Median Latitude: 22.269666 * Median Longitude: 63.515918 * South-bound Latitude: 21.926670 * West-bound Longitude: 62.895000 * North-bound Latitude: 22.548330 * East-bound Longitude: 64.040000
时间范围	2009-01-12T00:00:00 - 2009-01-20T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215233
推荐引用方式 GB/T 7714	Besseling,Marc,Hopmans,et al. Intact polar lipid composition and bottom water and surface sediment characteristics during R/V Pelagia cruise PASOM to the Arabian Sea in 2009.2018-06-21.https://doi.org/10.1594/PANGAEA.891253.