Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems

doi:10.1016/j.watres.2022.119499

	Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems
	Liu, Ting ; Liu, Xiaoqing 1; Pan, Qi 1; Liu, Shaoda 2; Feng, Xiaojuan1
	2023
发表期刊	WATER RESEARCH
ISSN	0043-1354
卷号	229
摘要	Erosion is the most widespread form of soil degradation and an important pathway of carbon transfer from land into aquatic systems, with significant impact on water quality and carbon cycle. However, it remains debatable whether erosion induces a carbon source or sink, and the fate of eroded soil carbon in aquatic systems remains poorly constrained. Here, we collect 41 representative soils from seven erosion-influenced basins and conduct microcosm simulation experiments to examine the fate of soil carbon under three different scenarios. We showed that soil carbon mineralization was generally promoted (by up to 10 times) in water under turbulence relative to in soils, but suppressed under static conditions upon entering into aquatic systems. Moreover, the enhancement of mineralization in turbulent systems is primarily related to soil aggregate content, while suppression in static systems positively relates to macromolecule abundance, indicating that soil geochemistry affects the magnitude of hydrodynamic effects on carbon mineralization. Random forest model further predicts that erosion may induce significant carbon sources in basins dominated by turbulent waters and aggregate-rich soils. Our findings demonstrate hydrodynamic and geochemical controls on soil carbon mineralization upon delivery into aquatic systems, which is a non-negligible part of the boundless carbon cycle and must be considered when making region-specific conservation strategies to reduce CO2 emissions from inland waters.
关键词	Erosion CO2 emission Aquatic systems Turbulent conditions Static hydrological conditions Aggregate
学科领域	Engineering, Environmental ; Environmental Sciences ; Water Resources
DOI	10.1016/j.watres.2022.119499
收录类别	SCI
语种	英语
WOS关键词	TERRESTRIAL ORGANIC-MATTER ; MICROBIAL COMMUNITY ; BURIAL EFFICIENCY ; INLAND WATERS ; EROSION ; SEDIMENT ; TRANSPORT ; LAKE ; DEGRADATION ; SEQUESTRATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000904450400005
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1879-2448
资助机构	National Natural Science Foundation of China ; [42025303] ; [41973075] ; [31988102]
作者邮箱	xfeng@ibcas.ac.cn
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/29131
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ting,Liu, Xiaoqing,Pan, Qi,et al. Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems[J]. WATER RESEARCH,2023,229.
APA	Liu, Ting,Liu, Xiaoqing,Pan, Qi,Liu, Shaoda,&Feng, Xiaojuan.(2023).Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems.WATER RESEARCH,229.
MLA	Liu, Ting,et al."Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems".WATER RESEARCH 229(2023).

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