Global scale production of brGDGTs by benthic marine bacteria: Implication for developing ocean bottom environmental proxies
Global scale production of brGDGTs by benthic marine bacteria: Implication for developing ocean bottom environmental proxies
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海底海洋细菌全球规模生产 brGDGT:对开发海底环境代理的影响
DOI:
10.1016/j.gloplacha.2022.103783
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发表时间:
2022-03
影响因子:
3.9
通讯作者:
Chuanlun Zhang
中科院分区:
文献类型:
--
作者:
Wenjie Xiao;Yunping Xu;Jian Lin;Zhiyu Zeng;Yongsheng Liu;Hongrui Zhang;Chuanlun Zhang
The in-situ production of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in marine environments has been generally accepted. However, whether it takes place in the water column or the sediments remains elusive. Here, we compiled a dataset composed of globally distributed marine sediments from continental shelves to hadal trenches to address this important knowledge gap. Firstly, a cutoff of ΣIIIa/ΣIIa ≥0.92 was applied to distinguish the marine vs. terrestrial signals of brGDGT production. For marine derived brGDGTs, the cyclization of branched tetraethers (CBT) index, related to ambient pH, displays a large variability, suggesting that marine derived brGDGTs in sediments are mainly produced within sediments where the pH of sediment porewater is highly variable, rather than in the water column where pH is relatively constant. This is also supported by good correlations between the bottom water temperature and the methylation of branched tetraethers (MBT’) index, between the water depth and the ΣIIIa/ΣIIa index, as well as between the brGDGT-based proxies and sediment redox conditions during glacial/interglacial cycles. We thus propose that the benthic production of brGDGTs in marine sediments is ubiquitous on a global scale, and is largely affected by the ambient temperature and pH. Our findings support that brGDGT-based proxies have potential of recording environmental conditions of the ocean bottom.
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影响因子:
3.9
作者:
Zhang Jie;Yu Zhigang;Jia Guodong
通讯作者:
Jia Guodong
影响因子:
1.8
作者:
C. Huguet;J.‐H. Kim;C. González‐Arango;V. Ramírez-Valencia;S. Kang;J. Gal;K. Shin
通讯作者:
C. Huguet;J.‐H. Kim;C. González‐Arango;V. Ramírez-Valencia;S. Kang;J. Gal;K. Shin
影响因子:
3
作者:
J. Kaiser;Stefan Schouten;R. Kilian;H. Arz;F. Lamy;J. Damsté
通讯作者:
J. Kaiser;Stefan Schouten;R. Kilian;H. Arz;F. Lamy;J. Damsté
DOI:
10.1016/j.gsf.2012.10.002
发表时间:
2013-03
期刊:
地学前缘(英文版)
影响因子:
--
作者:
Huangmin Ge;Chuanlun L. Zhang;Chuanlun L. Zhang;Hongyue Dang;Hongyue Dang;Chun Zhu;Chun Zhu;Guodong Jia;Guodong Jia
通讯作者:
Guodong Jia
影响因子:
5
作者:
Masanobu Yamamoto;A. Shimamoto;T. Fukuhara;Yuichiro Tanaka
通讯作者:
Masanobu Yamamoto;A. Shimamoto;T. Fukuhara;Yuichiro Tanaka