气候变化领域集成服务门户(CCPortal): Impacts of elevated CO2 levels and temperature on photosynthesis and stomatal closure along an altitudinal gradient are counteracted by the rising atmospheric vapor pressure deficit

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DOI	10.1016/j.scitotenv.2024.171173
	Impacts of elevated CO2 levels and temperature on photosynthesis and stomatal closure along an altitudinal gradient are counteracted by the rising atmospheric vapor pressure deficit
	Pernicova, Natalie; Urban, Otmar; Caslavsky, Josef; Kolar, Tomas; Rybnicek, Michal; Sochova, Irena; Penuelas, Josep; Bosela, Michal; Trnka, Miroslav
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	921
卷号	921
英文摘要	The efficiency of water use in plants, a critical ecophysiological parameter closely related to water and carbon cycles, is essential for understanding the interactions between plants and their environment. This study investigates the effects of ongoing climate change and increasing atmospheric CO2 concentration on intrinsic (stomata -based; iWUE) and evaporative (transpiration -based; eWUE) water use efficiency in oak trees along a naturally small altitudinal gradient (130-630 m a.s.l.) of Vihorlat Mountains (eastern Slovakia, Central Europe). To assess changes in iWUE and eWUE values over the past 60 years (1961-2020), stable carbon isotope ratios in latewood cellulose (delta 13Ccell) of annually resolved tree rings were analyzed. Such an approach was sensitive enough to distinguish tree responses to growth environments at different altitudes. Our findings revealed a rising trend in iWUE, particularly in oak trees at low and middle altitudes. However, this increase was negligible at high altitudes. Warmer and drier conditions at lower altitudes likely led to significant stomatal closure and enhanced efficiency in photosynthetic CO2 uptake due to rising CO2 concentration. Conversely, the increasing intracellularto -ambient CO2 ratio (Ci/Ca) at higher altitudes indicated lower efficiency in photosynthetic CO2 uptake. In contrast to iWUE, eWUE showed no increasing trends over the last 60 years. This suggests that the positive impacts of elevated CO2 concentrations and temperature on photosynthesis and stomatal closure are counteracted by the rising atmospheric vapor pressure deficit (VPD). These differences underscore the importance of the correct interpretation of stomata -based and transpiration -based WUEs and highlight the necessity of atmospheric VPD correction when applying tree -ring 613C -derived WUE at ecosystem and global levels.
英文关键词	Altitudinal gradient; Climate change; Chronologies; Plant water use efficiency; Quercus spp.; Tree-ring carbon isotopes
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001199158400001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290497
作者单位	Czech Academy of Sciences; Mendel University in Brno; Mendel University in Brno; Consejo Superior de Investigaciones Cientificas (CSIC); Autonomous University of Barcelona; Centro de Investigacion Ecologica y Aplicaciones Forestales (CREAF-CERCA); Centro de Investigacion Ecologica y Aplicaciones Forestales (CREAF-CERCA); Technical University Zvolen
推荐引用方式 GB/T 7714	Pernicova, Natalie,Urban, Otmar,Caslavsky, Josef,et al. Impacts of elevated CO2 levels and temperature on photosynthesis and stomatal closure along an altitudinal gradient are counteracted by the rising atmospheric vapor pressure deficit[J],2024,921.
APA	Pernicova, Natalie.,Urban, Otmar.,Caslavsky, Josef.,Kolar, Tomas.,Rybnicek, Michal.,...&Trnka, Miroslav.(2024).Impacts of elevated CO2 levels and temperature on photosynthesis and stomatal closure along an altitudinal gradient are counteracted by the rising atmospheric vapor pressure deficit.SCIENCE OF THE TOTAL ENVIRONMENT,921.
MLA	Pernicova, Natalie,et al."Impacts of elevated CO2 levels and temperature on photosynthesis and stomatal closure along an altitudinal gradient are counteracted by the rising atmospheric vapor pressure deficit".SCIENCE OF THE TOTAL ENVIRONMENT 921(2024).