干旱区生态环境知识资源中心(Arid): Control of hydrologic conditions and vegetation composition on carbon dynamics characterized by 13C enrichment in a dune-meadow cascade ecosystem in a semi-arid region

Arid

DOI	10.1016/j.catena.2023.107286
	Control of hydrologic conditions and vegetation composition on carbon dynamics characterized by 13C enrichment in a dune-meadow cascade ecosystem in a semi-arid region
	Kang, Xueer; Liu, Tingxi; Wang, Guanli; Hao, Lina; Duan, Limin; Tong, Xin; Singh, Vijay P.; Wu, Rong
通讯作者	Liu, TX
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	231
英文摘要	The variation of 13C enrichment (& UDelta;13C and & UDelta;& delta;13C) is an effective indicator of the spatiotemporal dynamics of carbon stock. However, based on 13C enrichment, the effects of global climate change, land use types and historical vegetation succession on carbon dynamics have been found to be equivocal. Taking semi-mobile dune (SD) and meadow wetland (MW) ecosystems in the Horqin Sandy Land as examples, this study examined the stable carbon isotope ratios (& delta;13C) during the growing seasons in 2019 and 2020, and determined the factors controlling the continuum & delta;13C. The results revealed that throughout the carbon migration process, under different physiological mechanisms of carbon assimilation, distribution, and respiration, the seasonal variation of carbon isotope patterns exhibited significant differences in the air-plant-soil continuum of dune and meadow ecosystems. The MW with long-term stable vegetation coverage had higher soil carbon turnover than that in SD. In SD, both long-term and short-term restoration-accelerated soil carbon turnover. The effect of soil moisture (Ms) on & UDelta;& delta;13C (the surface soil & delta;13C minus leaf & delta;13C) will exceed that of air temperature in SD and MW. In MW, field capacity (FC) was the decisive indicator of various sources of Ms (rainfall, groundwater) affecting 13C enrichment variation. & UDelta;13C (the discrimination of leaf carbon isotope) exerted a positive effect on & UDelta;& delta;13C only when Ms at 0-20 cm < FC, indicating the variable effect of photosynthesis on soil respiration throughout the growing seasons. Moreover, vegetation composition can also affect the extent to which soil respiration responds to photosynthesis.
英文关键词	Atmosphere-plant-soil continuum Succession Carbon dynamics Stable carbon isotopes Water use efficiency Spatiotemporal distribution of soil organic carbon
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001027061200001
WOS关键词	STABLE-ISOTOPE COMPOSITION ; SOIL RESPIRATION ; ORGANIC-MATTER ; C-13 ENRICHMENT ; GLOBAL PATTERNS ; PLANT ; LAND ; DECOMPOSITION ; GRASSLANDS ; DELTA-C-13
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395704
推荐引用方式 GB/T 7714	Kang, Xueer,Liu, Tingxi,Wang, Guanli,et al. Control of hydrologic conditions and vegetation composition on carbon dynamics characterized by 13C enrichment in a dune-meadow cascade ecosystem in a semi-arid region[J],2023,231.
APA	Kang, Xueer.,Liu, Tingxi.,Wang, Guanli.,Hao, Lina.,Duan, Limin.,...&Wu, Rong.(2023).Control of hydrologic conditions and vegetation composition on carbon dynamics characterized by 13C enrichment in a dune-meadow cascade ecosystem in a semi-arid region.CATENA,231.
MLA	Kang, Xueer,et al."Control of hydrologic conditions and vegetation composition on carbon dynamics characterized by 13C enrichment in a dune-meadow cascade ecosystem in a semi-arid region".CATENA 231(2023).