干旱区生态环境知识资源中心(Arid): Environmental Factors Driving the Transpiration of a Betula platyphylla Sukaczev Forest in a Semi-arid Region in North China during Different Hydrological Years

Arid

DOI	10.3390/f13101729
	Environmental Factors Driving the Transpiration of a Betula platyphylla Sukaczev Forest in a Semi-arid Region in North China during Different Hydrological Years
	Wu, Yiheng; Zhao, Pengwu; Zhou, Mei; Liu, Zebin; Yao, Huaxia; Wei, Jiangsheng; Shu, Yang; Li, Jiamei; Xiang, Changlin; Zhou, Liwen
通讯作者	Zhou, M
来源期刊	FORESTS
EISSN	1999-4907
出版年	2022
卷号	13 期号:10
英文摘要	More and more droughts happened during the last decades, threatening natural forests in the semi-arid regions of North China. The increase in drought pressure may have an impact on stand transpiration (T) in semi-arid regions due to rising temperature and changes in precipitation. It is unclear how the transpiration of natural forest in semi-arid regions respond to drought, which is regulated by environmental factors. In this study, a relatively simple but mechanism-based forest stand T model that couples the effects of the reference T, solar radiation (Rn), vapor pressure deficit (VPD), and relative extractable water (REW) in the 0-80 cm soil layer was developed to quantify the independent impacts of Rn, VPD, and REW on T. The model was established based on the observed sap flow of four sample trees, and environmental factors were observed from May to September in different hydrological years (2015, 2017, 2018, and 2021) in a pure white birch (Betula platyphylla Sukaczev) forest stand in the southern section of the Greater Khingan Mountains, northeastern China. The sap flow data were used to calculate tree transpiration (Tt) and T to calibrate the T model. The results indicated that (1) The Tt sharply declined in the 'dry' year compared with that in the 'wetter' year. The daily Tt for small trees in the 'dry' year was only one-fifth of that in the 'wetter' year, and the daily Tt of large trees was 48% lower than that in the 'normal' year; (2) Large trees transpired more water than small trees, e.g., the daily Tt of small trees was 89% lower than that of the large trees in the 'normal' year; (3) Daily T increased with the increase in Rn, and the response conformed to a binomial function. Daily T responded to the rise of VPD and REW in an exponential function, first increasing rapidly, gradually reaching the threshold or peak value, and then stabilizing; (4) The driving factors for the T shift in different hydrological years were the REW in the 'dry' year, but the Rn and REW in the 'wet', 'normal', and 'wetter' years. The REW in the 'wet' and 'wetter' years exerted positive effects on T, but in the 'normal' and 'dry' year, exerted negative effects on T. Thus, the environmental factors affecting T were not the same in different hydrological years.
英文关键词	Betula platyphylla Sukaczev forest coupling model drought environmental factors stand transpiration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000872895300001
WOS关键词	SCOTS PINE TRANSPIRATION ; SAP FLOW ; CANOPY CONDUCTANCE ; CLIMATE-CHANGE ; WATER-USE ; SOIL-MOISTURE ; STAND TRANSPIRATION ; TREE SIZE ; DROUGHT ; MODEL
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392631
推荐引用方式 GB/T 7714	Wu, Yiheng,Zhao, Pengwu,Zhou, Mei,et al. Environmental Factors Driving the Transpiration of a Betula platyphylla Sukaczev Forest in a Semi-arid Region in North China during Different Hydrological Years[J],2022,13(10).
APA	Wu, Yiheng.,Zhao, Pengwu.,Zhou, Mei.,Liu, Zebin.,Yao, Huaxia.,...&Zhou, Liwen.(2022).Environmental Factors Driving the Transpiration of a Betula platyphylla Sukaczev Forest in a Semi-arid Region in North China during Different Hydrological Years.FORESTS,13(10).
MLA	Wu, Yiheng,et al."Environmental Factors Driving the Transpiration of a Betula platyphylla Sukaczev Forest in a Semi-arid Region in North China during Different Hydrological Years".FORESTS 13.10(2022).