Spatial-temporal variation, sources and driving factors of organic carbon burial in rift lakes on Yunnan-Guizhou plateau since 1850

Yue Zhuo; Weihua Zeng; Dan Cui; Bingran Ma; Yuxi Xie; Jianping Wang

doi:10.1016/j.envres.2021.111458

Spatial-temporal variation, sources and driving factors of organic carbon burial in rift lakes on Yunnan-Guizhou plateau since 1850

Environ Res. 2021 Oct:201:111458. doi: 10.1016/j.envres.2021.111458. Epub 2021 Jun 19.

Authors

Yue Zhuo¹, Weihua Zeng², Dan Cui³, Bingran Ma⁴, Yuxi Xie⁵, Jianping Wang⁶

Affiliations

¹ State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China. Electronic address: zhuoyue1991@foxmail.com.
² State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China; Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China. Electronic address: zengwh@bnu.edu.cn.
³ State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China. Electronic address: cuidan2016@mail.bnu.edu.cn.
⁴ State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China. Electronic address: 912119005@qq.com.
⁵ State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, China. Electronic address: xieyx2017@mail.bnu.edu.cn.
⁶ Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, China. Electronic address: jianpingwang@isl.ac.cn.

PMID: 34157272
DOI: 10.1016/j.envres.2021.111458

Abstract

Burial of organic carbon (OC) in rift lakes on plateau is an important part of the global cycle. It is affected by natural and anthropogenic factors. In this study, we selected the sediment records of 7 rift lakes on the Yunnan-Guizhou Plateau to study spatial-temporal variation, sources and driving factors of organic carbon burial since 1850. The analysis of the temporal and spatial trend of carbon burial shows that the TOC concentration, TOC flux, C: N and mass accumulate rate have increased significantly since 1850. Co-occurrence network analysis indicated that a strong correlation between the TOC concentration and silty. TOC concentration were identified as core genera due to their high concentration. Carbon isotope tracing results show that before 1950, endogenous OC input played a dominant role, and after 1950, the proportion of exogenous OC increased. Canonical correlation analysis indicated that after 1950, agriculture intensification and population increase become one of the factors affecting the carbon burial of lakes in this area. The result of this study indicate that anthropogenic factors have become the main factors promoting carbon burial in rift lakes on the plateau.

Keywords: Canonical correlation analysis; Carbon isotope; Co-occurrence network; Organic carbon; Rift lakes.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Agriculture
Carbon* / analysis
China
Geologic Sediments
Lakes*

Substances

Carbon