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

doi:10.1016/j.watres.2022.119499

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Hydrodynamic and geochemical controls on soil carbon mineralization upon entry into aquatic systems
	Liu, Ting ; Liu, Xiaoqing 3; Pan, Qi 3; Liu, Shaoda 2; Feng, Xiaojuan 3
刊名	WATER RESEARCH
	2023
卷号	229
关键词	Erosion CO2 emission Aquatic systems Turbulent conditions Static hydrological conditions Aggregate
ISSN号	0043-1354
DOI	10.1016/j.watres.2022.119499
文献子类	Article
英文摘要	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.
学科主题	Engineering, Environmental ; Environmental Sciences ; Water Resources
电子版国际标准刊号	1879-2448
出版地	OXFORD
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)
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000904450400005
资助机构	National Natural Science Foundation of China ; [42025303] ; [41973075] ; [31988102]
内容类型	期刊论文
源URL	[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.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 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).