Spatial–temporal variability of terrestrial vegetation productivity in the Yangtze River Basin during 2000–2009

作     者：Yulong Zhang Conghe Song Kerong Zhang Xiaoli Cheng Quanfa Zhang 

作者机构：Key Laboratory of Aquatic Botany and Watershed EcologyWuhan Botanical GardenChinese Academy of Sciences1 Moshan RoadWuhan 430074China Department of GeographyUniversity of North Carolina209 South RoadChapel HillNC 27599USA Department of Life ScienceUniversity of the Chinese Academy of Sciences19 Yuquan RoadBeijing 100049China School of Forestry and Landscape ArchitectureAnhui Agricultural University130 West Changjiang RoadHefeiAnhui 230026China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2014年第7卷第1期

页      面：10-23页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：The National Natural Science Foundation of China(31130010) The Chinese Academy of Sciences(XDA05060500) 

主　　题：Yangtze River Basin climate warming GPP AR NPP CUE spatial-temporal variability 

摘      要：Aims Terrestrial net primary production(NPP),the balance of gross primary production(GPP)and autotrophic respiration(AR),is a critical measure of carbon sequestration capacity for the Earth’s land *** aim of this study was to understand the spatio-temporal variability of NPP associated with GPP and AR in the Yangtze River Basin(YRB),China,from 2000 to 2009 during which the basin warmed *** We first derived AR and carbon-use efficiency(CUE)from the improved Moderate Resolution Imaging Spectroradiometer GPP/NPP products(MOD17)and then conducted spatial analysis to quantify how NPP relates to GPP,AR and their relationship with key observed climate variables(temperature,precipitation and sunshine percentage)in the YRB during 2000–*** Findings The spatial pattern of NPP in the YRB was predominantly determined by GPP and further modified by *** GPP and relatively low AR made the southern Jinshajiang sub-basin the most productive area in NPP in the YRB.A large portion of the YRB experienced a warmer and drier climate trend in the growing season during 2000–*** the upper reaches of the basin,possessing a relatively low temperature base,increases in temperature led to greater increases in GPP than those in AR,resulting in greater increased ***,in the middle and lower reaches of the basin where the base temperature is relatively high,increases in temperature led to greater increases in AR than those in GPP,leading to decreases in ***,86.7%of the vegetated area showed a consistent GPP and NPP trend through time with 71.3%of the vegetated area having a positive trend both in GPP and NPP,and the remaining 13.3%of vegetated areas showed an opposite trend in GPP and NPP,with positive GPP and negative NPP trajectories dominating(10.1%of vegetated area)the *** climate warming generally had positive effects on vegetation growth in most areas of the basin,areas with increased NPP(74.5%)were less extensive than t