草业学报2017，Vol.26Issue(1)：1-12,12.DOI:10.11686/cyxb2016079
欧亚大陆草原带1982－2008年间净初级生产力时空动态及其对气候变化响应研究
Spatio-temporal dynamics of grassland net primary productivity and its response to climate change in the Temperate Eurasian Steppe 1982-2008
摘要
Abstract
The Temperate Eurasian Steppe (TES)is the world’s largest continuous vegetation transition zone. Made up mainly of the Kazakh and Mongol Steppe.TES is a typical arid/semi-arid zone and sensitive to climate change.However,little is known about its net primary productivity (NPP),especially for the Kazakh Steppe. In this study,an improved boreal ecosystem productivity simulator (BEPS)model was used to simulate NPP in TES from 1982 to 2008.The BEPS algorithms for maximum carboxylation efficiency and autotrophic respira-tion were improved to make them more applicable to arid/semi-arid regions and then validated by long-term field observations in Kazakhstan,Inner Mongolia and Xinjiang.Results indicated that the improved model could enhance NPP simulation.Over the 27-year period from 1982 to 2008,the average TES NPP was 120 g C/m2 ,of which 116.9 g C/m2 was located in the Mongol Steppe and 122 g C/m2 in the Kazakh Steppe.In a con-text of a regional “warming and drying”trend,the Mongol Steppe exhibited an obvious increasing NPP trend for the entire study period,while NPP in the Kazakh Steppe increased before 1991 and then decreased.The re-gional NPP showed a significant positive correlation with precipitation but was weakly correlated with tempera-ture,suggesting that precipitation is the primary climatic factor that impacts regional grassland growth.关键词
欧亚大陆草原带/BEPS模型/净初级生产力/气候变化Key words
Temperate Eurasian Steppe/BEPS model/net primary productivity (NPP)/climate change引用本文复制引用
陈奕兆,李建龙,孙政国,刚成诚..欧亚大陆草原带1982－2008年间净初级生产力时空动态及其对气候变化响应研究[J].草业学报,2017,26(1):1-12,12.基金项目
APN 全球变化基金项目（ARCP2015-03CMY-Li & CAF2015-RR14-NMY-Odeh），江苏省农业三新工程项目（SXGC［2014］287），江苏省自然科学基金项目（BK20140413），国家重点基础研究发展计划（973计划）项目（2010CB950702），江苏高校优势学科建设工程资助项目（PAPD）和国家重点研发计划（2016YFA0600202）资助。 （）
