沈阳经济区土地利用和净初级生产力变化  

Land use and net primary productivity changes in Shenyang Metropolitan Area

作　　者：陈探[1,2] 刘淼[1] 胡远满[1] 吕久俊 马俊[1,2] 孙凤云[1,2] 宫继萍[1,2] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院大学,北京100049 [3]辽宁省环境科学研究院,沈阳110161

出　　处：《生态学报》2015年第24期8231-8240,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金(41171155);辽宁省生态环境十年(2000-2010年)变化遥感调查与评估课题

摘　　要：分析了沈阳经济区2000到2010年土地利用变化情况。基于CASA(Carnegie-Ames-Stanford Approach)模型估算2000年、2005年、2010年沈阳经济区净初级生产力(NPP),从行政区划和地类角度分析其时空变化,统计了不同地类转换模式下NPP的损益值,从土地利用变化探讨分析了沈阳经济区土地利用变化带来的NPP变化情况。结果表明:(1)农田,林地和城镇用地为研究区最主要土地利用类型。土地利用最显著变化是城镇用地扩张迅速,农田面积大量减少。林地面积有所减少,草地、湿地、裸地面积变化较小;(2)沈阳经济区NPP呈明显退化趋势,并且时空变化显著,2000到2005年退化幅度大于2005到2010年。除了阜新市有增加,其他市的NPP均为减少;(3)沈阳经济区6种土地利用类型的平均NPP都在下降,降幅最大的是林地。NPP损益分析表明农田转城镇带来的年均NPP损失最大。In recent decades, urban areas in China have been rapidly increasing. This urban area expansion has caused land use changes, which have enormous influences on regional ecosystems. The potential environmental problems caused by urban expansion have attracted extensive attention from researchers. Net primary productivity （NPP） is the amount of solar energy converted to chemical energy atmosphere through the process of photosynthesis. NPP loss may affect the composition of the , fresh water availability, biodiversity, and the ecological adjusting mechanism of energy supply and distribution Moreover, NPP is also an important ecosystem productivity indicator. Hence, studying the impact of land use changes caused by urban expansion, on NPP is crucial to understanding ecosystem structure and function changes. In recent years, Shenyang Metropolitan Area has experienced rapid economic growth and industrial development under the guidance of the central government policy and local government strategy. As a result, urban area expansion of Shenyang Metropolitan Area has also accelerated, resulting in significant land use changes. The 10 years from 2000 to 2010 were representative of the process of Shenyang Metropolitan Area＇s urban expansion. This study analyzed land use changes with Shenyang Metropolitan Area from 2000 to 2010. Six categories of land use types were interpreted from Landsat TM/ETM remote sensing images： forestland, farmland, urban area, grassland, wetland, and bare land. NPP changes in the study area were estimated through the CASA model. The spatial and temporal dynamics of NPP were studied in regional and land use categorical scales. There is little prior research investigating this change trajectory of NPP under different land-use conversion types. The change of NPP caused by urban expansion of Shenyang Metropolitan Area was analyzed. The results showed ： （ 1 ） Farmland, forestland, and urban areas were the main land use types within the study area. Rapid urban expansion and loss of farmland

关 键 词：土地利用变化 NPP 沈阳经济区 

分 类 号：F301.24[经济管理—产业经济] S181[农业科学—农业基础科学]