干旱区生态环境知识资源中心(Arid): Seasonal and diurnal variation in ecosystem respiration and environmental controls from an alpine wetland in arid northwest China

Arid

DOI	10.1093/jpe/rtac050
	Seasonal and diurnal variation in ecosystem respiration and environmental controls from an alpine wetland in arid northwest China
	Yao, Hu; Peng, Haijun; Hong, Bing; Ding, Hanwei; Hong, Yetang; Zhu, Yongxuan; Wang, Jie; Cai, Cheng
通讯作者	Hong, B
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2022
卷号	15 期号:5 页码:933-946
英文摘要	Wetlands store large amounts of carbon stocks and are essential in both global carbon cycling and regional ecosystem services. Understanding the dynamics of wetland carbon exchange is crucial for assessing carbon budgets and predicting their future evolution. Although many studies have been conducted on the effects of climate change on the ecosystem carbon cycle, little is known regarding carbon emissions from the alpine wetlands in arid northwest China. In this study, we used an automatic chamber system (LI-8100A) to measure ecosystem respiration (ER) in the Bayinbuluk alpine wetland in northwest China. The ER showed a significant bimodal diurnal variation, with peak values appearing at 16:30 and 23:30 (Beijing time, UTC + 8). A clear seasonal pattern in ER was observed, with the highest value (19.38 mu mol m(-2) s(-1)) occurring in August and the lowest value (0.11 mu mol m(-2) s(-1)) occurring in late December. The annual ER in 2018 was 678 g C m(-2) and respiration during the non-growing season accounted for 13% of the annual sum. Nonlinear regression revealed that soil temperature at 5 cm depth and soil water content (SWC) were the main factors controlling the seasonal variation in ER. The diurnal variation in ER was mainly controlled by air temperature and solar radiation. Higher temperature sensitivity (Q(10)) occurred under conditions of lower soil temperatures and medium SWC (25% <= SWC <= 40%). The present study deepens our understanding of CO2 emissions in alpine wetland ecosystems and helps evaluate the carbon budget in alpine wetlands in arid regions.
英文关键词	alpine wetland ecosystem respiration environmental factors automatic chamber Q (10)
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000860845700001
WOS关键词	HETEROTROPHIC SOIL RESPIRATION ; TEMPERATURE SENSITIVITY ; NITROGEN ADDITION ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; BIOPHYSICAL REGULATION ; TIANSHAN MOUNTAINS ; DESERT STEPPE ; WATER-CONTENT
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393569
推荐引用方式 GB/T 7714	Yao, Hu,Peng, Haijun,Hong, Bing,et al. Seasonal and diurnal variation in ecosystem respiration and environmental controls from an alpine wetland in arid northwest China[J],2022,15(5):933-946.
APA	Yao, Hu.,Peng, Haijun.,Hong, Bing.,Ding, Hanwei.,Hong, Yetang.,...&Cai, Cheng.(2022).Seasonal and diurnal variation in ecosystem respiration and environmental controls from an alpine wetland in arid northwest China.JOURNAL OF PLANT ECOLOGY,15(5),933-946.
MLA	Yao, Hu,et al."Seasonal and diurnal variation in ecosystem respiration and environmental controls from an alpine wetland in arid northwest China".JOURNAL OF PLANT ECOLOGY 15.5(2022):933-946.