Distribution of glycerol dialkyl glycerol tetraethers in surface soils along an altitudinal transect at cold and humid Mountain Changbai: Implications for the reconstruction of paleoaltimetry and paleoclimate
Distribution of glycerol dialkyl glycerol tetraethers in surface soils along an altitudinal transect at cold and humid Mountain Changbai: Implications for the reconstruction of paleoaltimetry and paleoclimate
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冷湿长白山沿海拔样带表层土壤中甘油二烷基甘油四醚的分布：对古测温和古气候重建的启示
DOI：
10.1007/s11430-017-9168-9
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发表时间：
2018-04
期刊：
影响因子：
--
通讯作者：
Yang Huan
中科院分区：
文献类型：
--
作者：
Li Yue;Zhao Shijin;Pei Hongye;Qian Shi;Zang Jingjie;Dang Xinyue;Yang Huan
甘油二烷基甘油四醚（GDGT）是定量重建大陆和海洋环境古气候和古生态的重要工具。以往陆地环境中GDGT的研究主要集中在相对温暖潮湿或寒冷干燥地区的土壤中。然而，目前还不清楚GDGT如何在寒冷潮湿地区的环境变量的反应。在这里，我们收集了土壤沿着海拔样带的山（山）。以典型冷湿气候的长白为研究对象，探讨GDGT的分布特征及其替代因子对沿着气候变化的响应。古菌类异戊二烯GDGT（isoGDGT）的分布变化表明，古菌群落在样带上存在显著的沿着变化，这可能影响TEX 86与年平均气温（MAT）的关系。此外，在较高的海拔温度季节性增加产生了显着的影响TEX 86。我们提出了一个用于土壤环境生长季温度重建的TEX 86全球校准：T=85.19× TEX 86 −46.30（R2= 0.84，p <0.001）。MBT′ 5 me和MBT 5/6等5-甲基支链GDGT（brGDGT）的甲基化指数与土壤含水量相关，但与MAT无相关性，表明寒湿环境中的MBT′ 5 me和MBT 5/6可能不适合用于温度和海拔重建。而新近开发的6-甲基brGDGT甲基化指数MBT′ 6 me、支链四醚环化指数CBT、Ⅱ a ′异构体比IRIIa ′和Ⅲ a ′异构体比IRIIIa′等pH指标与土壤pH值相关性较好，表明这些指标仍可用于高寒湿润地区土壤pH的重建。MBT′ 5 me和MBT′ 6 me的组合与不同的气候类型（冷干、暖湿、冷湿和暖干）密切相关。如MBT′ 5 me <0.65和MBT′ 6 me>0.55可作为冷湿气候的诊断指标。因此，MBT′ 5 me和MBT′ 6 me的组合有可能作为识别不同类型古气候的工具。
Glycerol Dialkyl Glycerol Tetraethers (GDGTs) serve as important tools for the quantitative reconstruction of paleoclimate and paleoecology in both continental and marine environments. Previous studies of GDGTs in the terrestrial environments focused primarily on the soils from the relatively warm-humid or cold-dry regions. However, it is still unclear how GDGTs respond to environmental variables in the cold-humid regions. Here, we collected soils along an altitudinal transect of Mountain (Mt.) Changbai, which has a typical cold-humid climate, to investigate the distribution of GDGTs and the response of GDGT-based proxies to changes in climate along the transect. The shift in the distribution of archaeal isoprenoidal GDGTs (isoGDGTs) revealed that the archaeal community varied significantly along the transect, which can affect the relationship between TEX86and mean annual air temperature (MAT). In addition, the increased temperature seasonality at higher altitudes exerted a significant impact on TEX86. We proposed a global calibration of TEX86for the growing season temperature reconstruction in the soil environments:T=85.19×TEX86−46.30 (R2=0.84,p<0.001). The methylation indices for 5-methyl branched GDGTs (brGDGTs) including MBT′5meand MBT5/6, showed correlation with soil water content but no relationship with MAT, indicating that MBT′5meand MBT5/6from cold-humid environments may be not suitable for temperature and altitude reconstruction. In contrast, the recently developed pH proxies, including MBT′6me(the methylation index for 6-methyl brGDGTs), CBT (Cyclisation index of Branched Tetraethers), IRIIa’ (Isomer ratio of IIa′) and IRIIIa′ (Isomer ratio of IIIa′) exhibited significant correlations with soil pH, suggesting these proxies can still be used for soil pH reconstruction in the coldhumid regions. The combination of MBT′5meand MBT′6mewas strongly related to different types of climate (cold-dry, warmhumid, cold-humid, and warm-dry). For example, MBT′5me<0.65 and MBT′6me>0.55 are diagnostic for the cold-humid climate. Thus, the combination of MBT′5meand MBT′6mehas the potential as a tool for the identification of different types of paleoclimate.
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中国土壤中的支链四醚脂质：评估 MBT/CBT 指标作为古环境指标的保真度
DOI：
10.1007/s11430-016-5268-x
发表时间：
2016-03
期刊：
Science China Earth Sciences
影响因子：
--
作者：
Zheng FengFeng;Zhang ChuanLun;Chen YuFei;Li FuYan;Ma CenLing;Pu Yang;Zhu YuanQing;Wang YongLi;Liu WeiGuo
通讯作者：
Liu WeiGuo
影响因子：
5
作者：
Kim, Jung-Hyun;van der Meer, Jaap;Damste, Jaap S. Sinninghe
通讯作者：
Damste, Jaap S. Sinninghe
影响因子：
3
作者：
Powers, Lindsay;Werne, Josef P.;Schouten, Stefan
通讯作者：
Schouten, Stefan
影响因子：
5.3
作者：
G. Zhuang;M. Brandon;M. Pagani;S. Krishnan
通讯作者：
G. Zhuang;M. Brandon;M. Pagani;S. Krishnan
影响因子：
3
作者：
Liu, Weiguo;Wang, Huanye;He, Yuxin
通讯作者：
He, Yuxin