Coupled action of rock weathering and aquatic photosynthesis: Influence of the biological carbon pump effect on the sources and deposition of organic matter in Ngoring Lake, Qinghai-Tibet Plateau, China

doi:10.1016/j.catena.2021.105370

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Coupled action of rock weathering and aquatic photosynthesis: Influence of the biological carbon pump effect on the sources and deposition of organic matter in Ngoring Lake, Qinghai-Tibet Plateau, China
	He, Haibo 1; Liu, Guangxin 1; Zou, Yafei 1; Li, Xiangzhong 1,2,3; Ji, Ming 4; Li, Dongli 5
通讯作者	Li, Xiangzhong(xzhli04@163.com)
	2021-08-01
发表期刊	CATENA
ISSN	0341-8162
卷号	203 页码:10
摘要	A critical problem in the study of global climate change is how to identify "missing" carbon sinks. The carbon sink resulting from the weathering of carbonate and silicate minerals may make a major contribution, and it is often coupled with aquatic photosynthesis (the biological carbon pump effect - 'BCP'). However, the lack of relevant field studies hinders our understanding of rock weathering and the carbon cycle. To address this issue, we analyzed the pH, [HCO3-], carbon isotopic composition of dissolved inorganic carbon (delta C-13(DIC)), total organic carbon (TOC), total nitrogen (TN), TOC/TN, and the stable carbon isotopic composition of TOC (delta C-13(org)) and CaCO3 (delta C-13(carb)) in the modern surface sediments of Ngoring Lake, in the northeastern Qinghai-Tibet Plateau (QTP), China. The results show that the efficiency of aquatic photosynthesis may be an important factor affecting the delta C-13(DIC) in Ngoring Lake. delta C-13(org) in the surface sediments is positively correlated with the delta C-13(carb) of inorganic carbon produced within the lake, especially in shallow water (<10 m). In addition, the increase in the TOC content of the surface sediment samples is accompanied by an increase in the CaCO3 content. These observations suggest that the BCP effect is the major mechanism driving the observed synchronous increases in TOC and CaCO3 in the sediments, and the range of observed carbon isotope values. Furthermore, organic carbon in the surface sediments is characterized by a relatively low C/N ratio and delta C-13(org), suggesting it is mainly autochthonous, and is transformed within the aquatic ecosystem from rock weathering-derived DIC via the BCP effect. Therefore, the BCP effect plays an important role in the stabilization of the rock weathering carbon sink. Our results emphasize the importance of the carbon sink of coupled rock weathering and aquatic photosynthesis in the evolution of the carbon cycle in lakes in the QTP.
关键词	Rock weathering Biological carbon pump effect Autochthonous organic carbon Carbon sink Lake surface sediment
DOI	10.1016/j.catena.2021.105370
关键词[WOS]	DISSOLVED INORGANIC CARBON ; LIPID BIOMARKER ; YELLOW-RIVER ; ISOTOPE ; CO2 ; CLIMATE ; SEQUESTRATION ; FRACTIONATION ; PRECIPITATION ; CONSUMPTION
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[42007296] ; National Natural Science Foundation of China[41672163] ; National Natural Science Foundation of China[41991323] ; Yunnan Provincial Science and Technology Department[202001AV070012] ; Yunnan Provincial Science and Technology Department[202001BB050023] ; Youth Innovation Promotion Association CAS[Y201759]
WOS研究方向	Geology ; Agriculture ; Water Resources
项目资助者	National Natural Science Foundation of China ; Yunnan Provincial Science and Technology Department ; Youth Innovation Promotion Association CAS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000654354000064
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16742
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Li, Xiangzhong
作者单位	1.Yunnan Univ, Yunnan Key Lab Earth Syst Sci, Kunming 650500, Yunnan, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Qinghai Normal Univ, Acad Plateau Sci & Sustainabil, Xining 810016, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geog & Lirunol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China 5.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	He, Haibo,Liu, Guangxin,Zou, Yafei,et al. Coupled action of rock weathering and aquatic photosynthesis: Influence of the biological carbon pump effect on the sources and deposition of organic matter in Ngoring Lake, Qinghai-Tibet Plateau, China[J]. CATENA,2021,203:10.
APA	He, Haibo,Liu, Guangxin,Zou, Yafei,Li, Xiangzhong,Ji, Ming,&Li, Dongli.(2021).Coupled action of rock weathering and aquatic photosynthesis: Influence of the biological carbon pump effect on the sources and deposition of organic matter in Ngoring Lake, Qinghai-Tibet Plateau, China.CATENA,203,10.
MLA	He, Haibo,et al."Coupled action of rock weathering and aquatic photosynthesis: Influence of the biological carbon pump effect on the sources and deposition of organic matter in Ngoring Lake, Qinghai-Tibet Plateau, China".CATENA 203(2021):10.