Bacterial tetraether lipids in ancient bones record past climate conditions at the time of disposal
Dillon, James T.1; Lash, Sam1,2,3; Zhao, Jiaju4; Smith, Kevin P.5; van Dommelen, Peter2,3,6; Scherer, Andrew K.6; Huang, Yongsong1,3
2018-08-01
发表期刊JOURNAL OF ARCHAEOLOGICAL SCIENCE
卷号96期号:6页码:45-56
文章类型Article
摘要Assessing impacts of climate change on ancient human societies requires accurate reconstructions of regional climate variations. However, due to the scarcity of in situ climate indicators in archaeological sites, climate interpretation often relies on indirect, geographically distant data from geological archives such as lake or ocean sediments, ice cores and speleothems. Because many cultural changes occurred abruptly over periods of years to decades, and are regional or even local in scale, correlating societal changes with climate reconstructions from geological archives induces significant uncertainties: factors such as chronological dating inconsistencies and geographic heterogeneity of climate can severely undermine interpretation. Here we show, for the first time, that it is possible to determine past climate change by analyzing bacteria-derived 'branched glycerol dialkyl glycerol tetraethers' (br-GDGTs) in ancient bones from archaeological sites. To the best of our knowledge this proxy has never been applied before to bones, nor with the intention of developing the method for application in archaeological research. We demonstrate that these compounds are likely derived from bacterial growth within bones following deposition in the ground, and the potential for their distributions to reflect climate and environmental conditions during the years immediately following deposition when bacteria consume internal substrates. Our preliminary results show that bone samples from different climate zones display distinct br-GDGT distributions. Well-dated late Pleistocene and Holocene bones from Alaska yield reconstructed temperatures consistent with existing climate reconstructions. While further work is necessary to determine how quickly the signal stabilizes in the bones, and to continue ongoing refinement of calibrations for temperature, precipitation, and other influences on br-GDGTs, we propose that br-GDGTs from ancient bones in archaeological sites may be taken as a new, in situ archive for reconstructing past climate conditions. This opens new perspectives for assessing connections between climate variations and social transformations in the past.
关键词Bone Branched Glycerol Dialkyl Glycerol Tetraether Paleoclimate Archaeology
WOS标题词Science & Technology ; Social Sciences ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.jas.2018.05.009
关键词[WOS]DIALKYL GLYCEROL TETRAETHERS ; MEMBRANE-LIPIDS ; LAST DEGLACIATION ; TIBETAN PLATEAU ; ARCTIC ALASKA ; ASIAN MONSOON ; SOILS ; PROXY ; RECONSTRUCTION ; CALIBRATION
收录类别SCI
语种英语
WOS研究方向Anthropology ; Archaeology ; Geology
WOS类目Anthropology ; Archaeology ; Geosciences, Multidisciplinary
WOS记录号WOS:000442064300005
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5119
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Huang, Yongsong
作者单位1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
2.Brown Univ, Joukowsky Inst Archaeol & Ancient World, Providence, RI 02912 USA
3.Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA
4.Chinese Acad Sci, Inst Earth Environm, Xian, Shaanxi, Peoples R China
5.Brown Univ, Haffenreffer Museum Anthropol, Providence, RI 02912 USA
6.Brown Univ, Dept Anthropol, Providence, RI 02912 USA
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Dillon, James T.,Lash, Sam,Zhao, Jiaju,et al. Bacterial tetraether lipids in ancient bones record past climate conditions at the time of disposal[J]. JOURNAL OF ARCHAEOLOGICAL SCIENCE,2018,96(6):45-56.
APA Dillon, James T..,Lash, Sam.,Zhao, Jiaju.,Smith, Kevin P..,van Dommelen, Peter.,...&Huang, Yongsong.(2018).Bacterial tetraether lipids in ancient bones record past climate conditions at the time of disposal.JOURNAL OF ARCHAEOLOGICAL SCIENCE,96(6),45-56.
MLA Dillon, James T.,et al."Bacterial tetraether lipids in ancient bones record past climate conditions at the time of disposal".JOURNAL OF ARCHAEOLOGICAL SCIENCE 96.6(2018):45-56.
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