生态学报2017，Vol.37Issue(15)：4936-4945,10.DOI:10.5846/stxb201604290822
2001-2014年中国植被净初级生产力时空变化及其与气象因素的关系
Analysis of spatial and temporal variation of net primary productivity and climate controls in China from 2001 to 2014
摘要
Abstract
Net primary productivity (NPP) is a key variable in characterizing vegetation activity.NPP also plays an important role in evaluating ecosystem carrying capacity and understanding terrestrial ecosystem carbon cycle.The present study estimated the NPP in China from 2001 to 2014 based on the GLASS remote sensing dataset.We also analyzed the spatial and temporal variation of vegetation NPP in China with linear regression and Empirical Orthogonal Function (EOF) algorithms.By using correlation analysis and Singular Value Decomposition (SVD) method,the relationship between NPP and temperature and the relationship between NPP and precipitation were obtained,respectively.The results showed that (1) NPP in China revealed a decreasing pattern from southeast to northwest due to the spatial variability of vegetation and climatic characteristics.NPP also had a fluctuating increase trend during our study period with values ranging between 3.02 and 3.49 PgC/a.The average value was approximately 3.25 PgC/a.(2) The linear regression and EOF results are consistent.Both results indicated that NPP presented a decreasing tendency in the lower Yangtze region,North China Plain,and Changbai mountain area.In the Qinghai-Tibetan Plateau,northwest,central Inner Mongolia,and southeast coastal areas of China,NPP showed an increasing tendency.(3) The correlation analysis between NPP and meteorological elements indicated that NPP was positively correlated with temperature in the Changbai mountain area,Qinghai-Tibet Plateau,and southern area.NPP was also positively correlated with precipitation in the eastern Inner Mongolia and northwestern region.However,in the Northeast,Yangtze River,and east of the Qinghai-Tibetan Plateau area,NPP was negatively correlated with precipitation.The SVD results were consistent with the results of correlation analysis.We found significant correlations between NPP and temperature and precipitation.NPP was positively correlated with temperature in the Changbai mountain area,Inner Mongolia,and Qinghai-Tibet Plateau area.NPP was also positively correlated with precipitation in the northwest and central Inner Mongolia,whereas it was negatively correlated with precipitation in the lower Yangtze River and northeastern area.关键词
NPP/时空变化特征/气候因素/中国Key words
NPP/spatial-temporal variation/climate controls/China引用本文复制引用
刘刚,孙睿,肖志强,崔天翔..2001-2014年中国植被净初级生产力时空变化及其与气象因素的关系[J].生态学报,2017,37(15):4936-4945,10.基金项目
国家自然科学基金(41471349) （41471349）
国家科技支撑计划项目(2013BAC03B02) （2013BAC03B02）
中央高校基本科研业务费专项(2014kJJCA02)资助 （2014kJJCA02）
