祁连山中部不同海拔青海云杉径向生长对升温的响应分异  

Divergent responses of Qinghai spruce(Picea crassifolia)to recent warming along elevational gradients in the central Qilian Mountains,Northwest China

作　　者：张卫国 勾晓华 张芬 刘文火 张赟 高琳琳 ZHANG Weiguo;GOU Xiaohua;ZHANG Fen;LIU Wenhuo;ZHANG Yun;GAO Linlin(Key Laboratory of Western China's Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Gansu Liancheng Forest Ecosystem Field Observation and Research Station,Lanzhou University,Lanzhou 730000,China;State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,CAS,Lanzhou 730000,China;National Plateau Wetlands Research Center,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]Key Laboratory of Western China's Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China [2]Gansu Liancheng Forest Ecosystem Field Observation and Research Station,Lanzhou University,Lanzhou 730000,China [3]State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,CAS,Lanzhou 730000,China [4]National Plateau Wetlands Research Center,Southwest Forestry University,Kunming 650224,China

出　　处：《Journal of Geographical Sciences》2023年第1期151-168,共18页地理学报（英文版）

基　　金：National Natural Science Foundation of China,No.41790422;The Second Tibetan Plateau Scientific Expedition and Research Program(STEP),No.2019QZKK0301;The National Key Research&Development(R&D)Program of China,No.2019YFC0507401;National Natural Science Foundation of China,No.41801018;The 111 Project,No.BP0618001;The Foundation for Excellent Youth Scholars of“Northwest Institute of Eco-Environment and Resources”,CAS,No.FEYS2019004。

摘　　要：Understanding the radial growth trends of trees and their response to recent warming along elevation gradients is crucial for assessing how forests will be impacted by future climate change.Here,we collected 242 tree-ring cores from five plots across the Qinghai spruce(Picea crassifolia Kom.)forest belt(2600–3350 m a.s.l.)in the central Qilian Mountains,Northwest China,to study trends in the radial growth of trees and their response to climate factors with variable elevation.All the sampled P.crassifolia chronologies showed an increasing trend in the radial growth of trees at higher altitudes(3000–3350 m),whereas the radial growth of trees at lower altitudes(2600–2800 m)has decreased in recent decades.The radial growth of trees was limited by precipitation at lower elevations(L,ML),but mainly by temperature at higher elevation sites(MH,H,TL).Climate warming has caused an unprecedented increase in the radial growth of P.crassifolia at higher elevations.Our results suggest that ongoing climate warming is beneficial to forest ecosystems at high elevations but restricts the growth of forest ecosystems at low elevations.

关 键 词：global warming altitudinal gradient Qinghai spruce tree radial growth DENDROECOLOGY 

分 类 号：S791.18[农业科学—林木遗传育种]