摘要
为探讨山西历山国家级自然保护区近年来森林植被的变化情况及在减缓森林面积丧失、保护森林植被等方面的效果,该研究以RS与GIS技术为支撑,从森林面积和植被覆盖度(NDVI)两方面分析了山西历山国家级自然保护区2000—2010年森林植被的动态变化特征。结果表明:(1)森林植被的面积增加了81.99 hm 2,其增长主要源于实验区灌丛演替的结果,以2005—2010年间增加最多,核心区和缓冲区的森林植被面积基本保持不变;(2)10年间,保护区NDVI呈上升趋势,其中2005—2010年间的上升速度最快,92.99%的森林植被NDVI趋于稳定,6.64%的森林植被NDVI有明显增加,尤以实验区增加最多,表明其生态环境得到了改善;(3)在海拔垂直空间上,针叶林与阔叶林面积变化的差异性类似,且二者有明显的垂直分布规律。在海拔高度低于1300 m的地区受人类活动影响较大,NDVI随海拔高度的升高而增大,海拔高度为1300~2000 m NDVI相对较为稳定,海拔高度高于2000 m的地区NDVI主要受热量条件限制。研究表明,10年来山西历山国家级自然保护区内森林面积和生长状况保持稳定或略有增加,植被趋于改善,森林植被的保护效果较好。
In order to study the forest changes of Shanxi Lishan National Nature Reserve in recent years,and explore the effect of the reserve in slowing loss of forest area and protecting forest vegetation.Based on the technology of RS and GIS,the dynamic changes of forest vegetation in Shanxi Lishan National Nature Reserve from 2000 to 2010 years were quantitatively studied with two aspects of forest area and vegetation cover degree(NDVI).The dynamic analysis of the forest vegetation in Shanxi Lishan National Nature Reserve showed that the protection of forest ecosystems by nature reserves mainly manifests in aspect on maintaining forest type and forest vegetation area,improving the vegetation status and promoting its positive succession.In the past ten years,the forest area of Shanxi Lishan National Nature Reserve had increased to 81.99 hm 2,in which the main changes was shrub succession in experimentation area,especially during 2005 to 2010 years,while the area of forest vegetation in core area and buffer area remained unchanged.NDVI was rising in the past 10 years,and the rising speed was relatively faster from 2005 to 2010 years.92.99 percent of the forest vegetation remained stable,6.64 percent of the forest vegetation was improved,especially in the experimentation area,which showed that the ecological environment in Shanxi Lishan National Nature Reserve has been improved.The spatial difference of vertical variation in coniferous forests and broad-leaved forests was similar,both two had a clear vertical distribution.NDVI was affected by human activities in a low altitude areas(<1300 m),and it relatively stable in the altitude of 1300~2000 m,while it mainly affected by heat conditions in a higher altitude(>2000 m).Two aspect of forest area and growth status were both remained stable or increased slightly in Shanxi Lishan National Nature Reserve during the past 10 years,and it had a better influence on the protection of forest vegetation.Therefore,the role of nature reserve in protecting forest vegetation has fully demonstrated that establish nature reserveit is a very effective way in protecting natural ecological environment.
作者
马晓勇
赵娜
李晓婷
MA Xiao-yong;ZHAO Na;LI Xiao-ting(Shanxi Research Academy of Environmental Sciences,Taiyuan 030024,China)
出处
《环境生态学》
2019年第7期45-52,共8页
Environmental Ecology
关键词
森林植被
NDVI
时空变化
历山国家级自然保护区
山西
forest vegetation
NDVI
spatial-temporal variation
Lishan National Nature Reserve
Shanxi province
