晋西北防护林30年来时空变化特征及影响要素  

Spatiotemporal variation characteristics and influencing factors of protection forests after their 30 years construction in Northwest Shanxi Province of China

作　　者：李秀芬[1] 苏蕾[2] 张金鑫[3] 张泽秀[1] 刘利民[1] 刘雪峰[1] 

机构地区：[1]沈阳农业大学,沈阳110866 [2]东北林业大学,哈尔滨150036 [3]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《生态学杂志》2013年第9期2382-2389,共8页Chinese Journal of Ecology

基　　金：辽宁省教育厅项目(2010096);中国科学院重大项目(KZCX1-YW-08-02-02)资助

摘　　要：为了了解晋西北地区防护林建设30年来的变化情况,采用ERDAS和GIS分析工具对该地区1980年、1990年、2000年和2007年4期遥感影像进行人工目视解译,分析了该地区防护林近30年的时空变化特征,并对引起这种变化的驱动力因素进行了探讨。结果表明:近30年防护林空间分布格局变化不大,以灌木分布最多(约占整个林地面积的50%),针阔混交林最少(不到林地面积的10%);近30年防护林的总面积呈减少趋势,3个时段(1980—1990年、1990—2000年和2000—2007年)的年变化率分别为-2.04%、0.62%和-0.029%;近30年的林地变化主要以林地与耕地和草地间的相互转化为主,各类型林地间相互转变次之;政策因素是影响林地变化的主要因素;此外,地表水文及人为干扰对林地时空变化也产生了影响。In order to understand 30 years construction in Northwest the variation characteristics ot Shanxi Province of China, the the protechon Iorests after their remote sensing images of North- west Shanxi in 1980, 1990, 2000 and 2007 were used for visual interpretation, and the spatio- temporal variation characteristics of the protection forests and related driving forces were ana- lyzed. There were no significant variations in the spatial pattern of the protection forests during the 30 years. Among the protection forests, shrub forests dominated （about 50% of the total）, and coniferous-broadleaved mixed forests took the least percentage （ 〈 10% ）. The total area of the protection forests during the 30 years presented a decreasing trend, with the annual variation rate in 1980-1990, 1990-2000, and 2000-2007 being -2.04%, 0.62%, and -0. 029%, re- spectively. The variations of the protection forests were dominated by the conversions among woodland, farmland, and grassland, followed by the conversions among different woodland types. Policy was the main factor causing the variation of woodland. In addition, surface water condi- tions and human disturbances also played important roles in the variations of protection forests in the study region.

关 键 词：遥感技术 晋西北防护林 时空变化特征 驱动力 

分 类 号：S718.5[农业科学—林学]