Warming-induced phenological mismatch between trees and shrubs explains high-elevation forest expansion  

作　　者：Xiaoxia Li Eryuan Liang JJulio Camarero Sergio Rossi Jingtian Zhang Haifeng Zhu Yongshuo H.Fu Jian Sun Tao Wang Shilong Piao Josep Penuelas 

机构地区：[1]State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China [2]Laboratoire sur lesécosystèmes terrestres boréaux,Département des Sciences Fondamentales,Universitédu QuébecàChicoutimi,Chicoutimi G7H2B1,Canada [3]Instituto Pirenaico de Ecología(IPE-CSIC),Zaragoza 50059,Spain [4]College of Water Sciences,Beijing Normal University,Beijing100875,China [5]CREAF,Cerdanyola del Valles,Barcelona 08193,Spain [6]CSIC,Global Ecology Unit CREAF-CSIC-UAB,Bellaterra,Barcelona 08193,Spain

出　　处：《National Science Review》2023年第10期55-64,共10页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(42030508 and 42271065);the Second Tibetan Plateau Scientific Expedition and Research Program(STEP)(2019QZKK0301);the Youth Innovation Promotion Association Program of the Chinese Academy of Sciences(2020073);the State Scholarship Fund(202004910219)provided by the China Scholarship Council;the support of the project CGL2015-69186-C2-1-R(Spanish Ministry of Science);financial support from the Catalan Government(SGR 2021-1333);the TED2021-132627BI00 grant funded by Spanish Ministry of Science and Innovation and the European Union NextGeneration EU/PRTR;the Fundación Ramón Areces(CIVP20A6621)。

摘　　要：Despite the importance of species interaction in modulating the range shifts of plants,little is known about the responses of coexisting life forms to a warmer climate.Here,we combine long-term monitoring of cambial phenology in sympatric trees and shrubs at two treelines of the Tibetan Plateau,with a meta-analysis of ring-width series from 344 shrubs and 575 trees paired across 11 alpine treelines in the Northern Hemisphere.Under a spring warming of+1℃,xylem resumption advances by 2-4 days in trees,but delays by 3-8 days in shrubs.The divergent phenological response to warming was due to shrubs being3.2 times more sensitive than trees to chilling accumulation.Warmer winters increased the thermal requirement for cambial reactivation in shrubs,leading to a delayed response to warmer springs.Our meta-analysis confirmed such a mechanism across continental scales.The warming-induced phenological mismatch may give a competitive advantage to trees over shrubs,which would provide a new explanation for increasing alpine treeline shifts under the context of climate change.

关 键 词：CHILLING climate warming FORCING treeline shift XYLOGENESIS 

分 类 号：Q948[生物学—植物学]