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Hydraulic safety and growth rather than climate of origin influence survival in desert shrubs and trees

文献类型： 外文期刊

作者： Zhang, Hongxia 1 ; McDowell, Nate G. 2 ; Li, Xinrong 1 ; Huo, Jianqiang 1 ; Li, Yunfei 1 ; Wang, Zhanjun 5 ;

作者机构： 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China

2.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99354 USA

3.Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA

4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

5.Ningxia Acad Agr & Forestry Sci, Inst Forestry & Grassland Ecol, Yinchuan 750002, Peoples R China

6.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China

关键词： Desert ecosystem; Gas exchange; Plant hydraulics; Safety margin; Turgor loss point; Vulnerability to embolism; Xerophytic woody plants; Xylem conductivity

期刊名称：FOREST ECOLOGY AND MANAGEMENT （ 影响因子：3.7； 五年影响因子：3.8 ）

ISSN： 0378-1127

年卷期： 2023 年 543 卷

页码：

收录情况： SCI

摘要： The species-poor woodlands in arid regions are particularly vulnerable to climate change induced plant die-off. Searching for species suitable to replant in these areas is an effective way to prevent further expansion of land desertification. Good knowledge of drought resistance of species is critical for current replanting efforts, however, the related plant survival mechanisms in the process of restoration remain limited. Here, we tested the dominant drivers of plant survival in relation to climate factors, growth characteristics and functional traits including hydraulics and gas exchange across 35 multiple shrub and tree woody species in a common garden at the Tengger Desert, northwest China. We found a wide range of hydraulic thresholds among these desert species, with relatively high hydraulic safety and low xylem hydraulic conductivity. Pant survival was largely determined by hydraulic safety and growth status, but was not affected by the climate of the species' site of origin. Shrubs and trees diverged in hydraulic and growth characteristics, while no difference between native and introduced species was found. Our results highlight the critical roles of hydraulic safety and growth on determining the survival and drought adaptation during desert vegetation development, which provide a new insight into ecological restoration in arid regions under changing climate conditions.

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