Nitrogen deposition increases xylem hydraulic sensitivity but decreases stomatal sensitivity to water potential in two temperate deciduous tree species

doi:10.1016/j.scitotenv.2022.157840

	Nitrogen deposition increases xylem hydraulic sensitivity but decreases stomatal sensitivity to water potential in two temperate deciduous tree species
	Fan, Da-Yong ; Dang, Qing-Lai ; Yang, Xiao-Fang ; Liu, Xiao-Ming ; Wang, Jia-Yi ; Zhang, Shou-Ren
	2022
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	848
摘要	Although the effects of nitrogen deposition on tree water relations are studied extensively, its impact on the relative sensitivities of stomatal and xylem hydraulic conductance to vapor pressure deficit and water potential is still poorly understood. This study investigated the effects of a 7-year N deposition treatment on the responses of leaf water relations and sensitivity of canopy stomatal conductance to vapor pressure deficit (VPD) and water potential, as well as the sensitivity of branch hydraulic conductance to water potential in a dominant tree species (Quercus wutaishanica) andan associated tree species (Acer mono) in a temperate forest. It was found that the N deposition increased stomatal sensitivity to VPD, decreased stomatal sensitivity to water potential, and increased the vulnerability of the hydraulic system to cavitation in both species. The standardized stomatal sensitivity to VPD, however, was not affected by the N deposition, indicating that the stomata maintained the ability to regulate the water balance under nitrogen deposition condition. Although the increased stomatal sensitivity to VPD could compensate the decreased stomatal sensitivity to water potential to some extent, the combined response would increase the percentage loss of hydraulic conductivity (PLC) when 50 % loss in stomatal conductance occurred, particularly in the dominant species Q. wutaishanica. The result indicates that N deposition would increase the risk of hydraulic failure in those species if the soil and/or air becomes drier under future climate change scenarios. The results of the study can have significant implications on the modelling of ecosystem vulnerability to drought under the scenario of atmospheric nitrogen deposition.
关键词	Temperate forest Nitrogen deposition Water relations Stomatal responses Xylem embolism
学科领域	Environmental Sciences
DOI	10.1016/j.scitotenv.2022.157840
收录类别	SCI
语种	英语
WOS关键词	VAPOR-PRESSURE DEFICIT ; GLOBAL RESPONSE PATTERNS ; SAP-FLOW ; GAS-EXCHANGE ; ELEVATED CO2 ; FUNCTIONAL TRAITS ; USE EFFICIENCY ; CONDUCTANCE ; FOREST ; DROUGHT
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000888830900010
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1879-1026
资助机构	National Key Research and Development Program of China [2016YFA0600802]
作者邮箱	dayong73fan@163.com ; zhangsrcn@hotmail.com
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/29059
专题	植被与环境变化国家重点实验室
作者单位	1.[Fan, Da-Yong 2.Beijing Forestry Univ, Key Lab Silviculture & Conservat, Minist Educ, Beijing 100083, Peoples R China 3.Lakehead Univ, Fac Nat Resources Management, Thunder Bay, ON, Canada 4.[Yang, Xiao-Fang 5.Liu, Xiao-Ming 6.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100096, Peoples R China
推荐引用方式 GB/T 7714	Fan, Da-Yong,Dang, Qing-Lai,Yang, Xiao-Fang,et al. Nitrogen deposition increases xylem hydraulic sensitivity but decreases stomatal sensitivity to water potential in two temperate deciduous tree species[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,848.
APA	Fan, Da-Yong,Dang, Qing-Lai,Yang, Xiao-Fang,Liu, Xiao-Ming,Wang, Jia-Yi,&Zhang, Shou-Ren.(2022).Nitrogen deposition increases xylem hydraulic sensitivity but decreases stomatal sensitivity to water potential in two temperate deciduous tree species.SCIENCE OF THE TOTAL ENVIRONMENT,848.
MLA	Fan, Da-Yong,et al."Nitrogen deposition increases xylem hydraulic sensitivity but decreases stomatal sensitivity to water potential in two temperate deciduous tree species".SCIENCE OF THE TOTAL ENVIRONMENT 848(2022).

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