Phenology of different types of vegetation and their response to climate change in the Qilian Mountains,China

作     者：ZHAO Kaixin LI Xuemei ZHANG Zhengrong LIU Xinyu ZHAO Kaixin;LI Xuemei;ZHANG Zhengrong;LIU Xinyu

作者机构：Faculty of GeomaticsLanzhou Jiaotong UniversityLanzhou 730070China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State MonitoringLanzhou 730070China Gansu Provincial Engineering Laboratory for National Geographic State MonitoringLanzhou 730070China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2024年第21卷第2期

页      面：511-525页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 0713[理学-生态学] 

基　　金：financially supported by the National Natural Sciences Foundation of China(42261026,41971094,and 42161025) Gansu Science and Technology Research Project(22ZD6FA005) Higher Education Innovation Foundation of Education Department of Gansu Province(2022A-041) the open foundation of Xinjiang Key Laboratory of Water Cycle and Utilization in Arid Zone(XJYS0907-2023-01) 

主　　题：Vegetation phenology Time series decomposition Path Analysis Climate change 

摘      要：The Qilian Mountains(QM)possess a delicate vegetation ecosystem,amplifying the evident response of vegetation phenology to climate *** relationship between changes in vegetation growth and climate remains *** this end,we used MODIS NDVI data to extract the phenological parameters of the vegetation including meadow(MDW),grassland(GSD),and alpine vegetation(ALV))in the QM from 2002 to ***,we employed path analysis to reveal the direct and indirect impacts of seasonal climate change on vegetation ***,we decomposed the vegetation phenology in a time series using the trigonometric seasonality,Box-Cox transformation,ARMA errors,and Trend Seasonal components model(TBATS).The findings showed a distinct pattern in the vegetation phenology of the QM,characterized by a progressive shift towards an earlier start of the growing season(SOS),a delayed end of the growing season(EOS),and an extended length of the growing season(LOS).The growth cycle of MDW,GSD,and ALV in the QM species is clearly *** SOS for MDW and GSD occurred earlier,mainly between late April and August,while the SOS for ALVs occurred between mid-May and mid-August,a one-month delay compared to the other *** EOS in MDW and GSD were concentrated between late August and April and early September and early January,*** phenology exhibits distinct responses to seasonal temperature and precipitation *** advancement and delay of SOS were mainly influenced by the direct effect of spring temperatures and precipitation,which affected 19.59%and 22.17%of the study area,*** advancement and delay of EOS were mainly influenced by the direct effect of fall temperatures and precipitation,which affected 30.18%and 21.17%of the area,*** the contrary,the direct effects of temperature and precipitation in summer and winter on vegetation phenology seem less noticeable and were mainly influenced by indirect *** indirec