| 伊洛河流域典型地区森林景观格局动态 |
| |
| 引用本文： | 丁圣彦,钱乐祥,曹新向,李爽,李昊民.伊洛河流域典型地区森林景观格局动态[J].地理学报,2003,58(3):354-362. |
| |
| 作者姓名： | 丁圣彦 钱乐祥 曹新向 李爽 李昊民 |
| |
| 作者单位： | 河南大学环境与规划学院,河南,开封,475001 |
| |
| 基金项目： | 河南省杰出青年基金(0003，9920)，河南省自然科学基金(0111070100)~~ |
| |
| 摘 要： | 以野外调查资料和1983-1999年森林资源分布图为主要信息源，用ARC／INFO作为空间信息处理工具，采用斑块数、平均斑块面积、破碎化指数、斑块伸长指数、分数维、稳定度等指标分析了近20年来伊洛河流域中部典型地区的森林景观格局动态。结果表明，(1)研究区内森林总面积在增加，斑块数量迅速增大，由556块增至1494块。其中以刺槐林、经济林和杨树林斑块数量增加最多。景观破碎化程度明娃加大。(2)森林景观要素中灌木林、刺槐林、经济林、杨树林、栎林等斑块的面积有所增加，而非林地、荒草地、疏林、油松林等斑块的面积有所减小；除杨树林外，各森林类型斑块的平均面积部在减小。(3)研究区内沟谷植被覆盖面积共减少了220827．9hm^2,丘陵森林覆被面积由1983年的161870．4hm^2增加到1999年的312 599．7hm^2，增加了93．1％；斑块数目由79块增加到758块，增加了860％。而丘陵地区斑块平均面积却大大减小；山地森林覆被面积有所减少，由1983年的375348．6hm^2减小到1999年的338733．9hm^2，而斑块数却大幅度增加，由1983年的432块增加到1999年的1127块，增加了695块。(4)研究区南北山坡森林景观格局变化明显不同，这与南北坡土地类型不同、人类活动方式不同和地形地势的差别有关。
|
| 关 键 词： | 森林景观 地貌类型区 伊洛河 空间信息处理 |
| 收稿时间： | 2002-09-12 |
| 修稿时间： | 2002年9月12日 |
Forest Landscape Patterns Dynamics of Yihe-Louhe River Basin |
| |
| DING Shengyan,QIAN Lexiang,CAO Xinxiang,LI Shuang,LI Haomin.Forest Landscape Patterns Dynamics of Yihe-Louhe River Basin[J].Acta Geographica Sinica,2003,58(3):354-362. |
| |
| Authors: | DING Shengyan QIAN Lexiang CAO Xinxiang LI Shuang LI Haomin |
| |
| Institution: | College of Environment & Planning, Henan University, Kaifeng 475001, China |
| |
| Abstract: | With the help of ARC/INFO software, based on the information from forest resources distribution maps of Luoning County of 1983 and 1999, six indices were used to analyze spatial patterns dynamics of forest landscapes of typical regions in the middle reaches of the Yihe-Luohe basin. These indices included patch number, mean patch area, fragment index, patch extension index etc. The results showed that, (1) there was a rapid increase in the number of patch and total area from 1983 to 1999 in the study area. The fragment degree was becoming serious. (2) The fractal degree of each forest patch type became increasingly great from 1983 to 1999. The mean extension index of Robinia pseudoacacia forest, non-forest, shrub forest, sparse forest and Quercus species forest had increased rapidly, but that of economic forest became zero. (3) The changes of landscape pattern were different in different geomorphic zones. From 1983 to 1999, the vegetation cover area, the gross number and the density of patches, the diversity and evenness of landscapes were all reduced greatly in gullies, but the maximum area and the mean area of patch types were increased. |
| |
| Keywords: | forest landscape geomorphic zone Yihe-Luohe river basin Luoning County |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地理学报》浏览原始摘要信息 |
| 点击此处可从《地理学报》下载免费的PDF全文 |
|
