摘要
地理环境因素是引起区域森林景观动态变化的主要原因。运用景观生态学的基本原理,借助于地理信息系统技术,分析了自1983年以来伊洛河流域洛宁县森林景观的动态变化。结果显示,森林景观类型总面积呈增加趋势,从1983年的960.34km2增加到1999年的1175.00km2。景观空间动态变化上,森林景观类型转化为非森林景观类型部分主要位于海拔500~1000m的低山区,海拔大于1000m的地区森林景观类型变化较小,而非森林景观类型转化为森林景观类型主要集中在海拔高度小于500m的塬陵区和川涧区。通过建立森林景观类型动态变化与相应高程、坡度、距离居民点中心的远近和与森林边缘距离之间的相互关系,分析了与上述地理环境因素之间的相关性,表明森林景观类型动态变化与上述地理环境因素之间有显著相关关系。
Great attention has been paid to the forest landscape change,and the robust modeling of these processes is important for policy as well as academic concerns.The science of forest landscape change analysis is advancing rapidly,with the development of increasingly sophisticated,reliable and accessible tools and techniques.Perhaps the most effort has been devoted to the modeling of deforestation processes including agricultural expansion.This paper concerns a relatively small area of Yiluo River Basin where considerable national and international attention has been paid to slow down the expansion of land for non-forests into the remaining natural forests.In the present study,we reconstructed the former forest landscape structure and elucidated the landscape change from 1983 to 1999.Two sets of maps were used for analyses： forest resources distribution maps of 1983 and 1999.The result showed that there was an increase in the area of the forest landscape from 960.34 km2 in 1983 to 1175 km2 in 1999.Then the approach adopted here is to examine the degree to which forest landscape conversion can be attributed to a set of factors that have been identified as significant at broader scales,namely topography,distribution of the village clusters（centroids）,distance from villages（centroids） and forest edge（1983）.By using ＂spatial analysis＂ in Arc/gis 8.3,the correlation on forest landscape change and driving factors were constructed.The study finds that forest landscape conversion in the concerned area is largely explained by elevation,slope,and village proximity.
出处
《地理研究》
CSCD
北大核心
2007年第5期906-914,I0003,共10页
Geographical Research
基金
国家自然科学基金(30570301
40671175)联合资助
关键词
伊洛河
洛宁县
森林景观
地理环境因素
Yiluo River
Luoning County
forest landscape
geographic environmental factors
