|
|||||
|
|
| 大渡河上游地区景观格局与动态 | |
| 引用本文： | 摆万奇,张镱锂,包维楷.大渡河上游地区景观格局与动态[J].自然资源学报,2003,18(1):75-80. |
| 作者姓名： | 摆万奇 张镱锂 包维楷 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所, 北京 100101; 2. 中国科学院成都生物研究所, 成都 610041 |
| 基金项目： | 国家重点基础研究发展规划项目(G1998040800)，国家自然科学基金项目(30270256)资助。 |
| 摘 要： | 利用卫星遥感资料,对大渡河上游地区金川、壤塘、马尔康三县18665km2土地的景观格局与动态进行分析。结果显示,1995～2000年,研究地区的景观破碎化程度有所下降,多样性增加,斑块形状不规则性增强。整个景观表现出以草地为基质,以林地变动为主要特征。5年间,有林地面积减少53687hm2,大部分转变为灌木林地和疏林地。有林地的空间动态,如斑块密度下降,形状趋于规则等,显示该地区森林减少主要是有计划采伐的结果。耕地面积的下降则表明当地退耕还林、还草的政策措施已初见成效。 |
| 关 键 词： | 景观格局 景观动态 景观生态学 大渡河上游 |
| 文章编号： | 1000-3037(2003)01-0075-06 |
| 收稿时间： | 2002-06-17 |
| 修稿时间： | 2002年6月17日 |
Landscape patterns and dynamics in the upper reaches of the Dadu River |
|
| BAI Wan-qi,ZHANG Yi-li,BAO Wei-kai.Landscape patterns and dynamics in the upper reaches of the Dadu River[J].Journal of Natural Resources,2003,18(1):75-80. | |
| Authors: | BAI Wan-qi ZHANG Yi-li BAO Wei-kai |
| Affiliation: | 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2. Chengdu Institute of Biology, CAS, Chengdu 610041, China |
| Abstract: | Based on satellite imagery,this paper has analyzed the landscape patterns and dynamics in the upper reaches of the Dadu River,which consists of3counties of Jinchuan,Rangtang and Maerkang,covering an area of18665km2 .The results show a decreasing landscape fragmentation process,increased landscape diversity and irregularity of patch shape between1995and2000.The whole region is characterized by grassland being matrice and changes in forest land.Within5years between1995and2000,forested land decreased53687ha,most of which were converted to shrub and sparse woodland.The decreased density and increased regu larity of forest patches indicate that the decreased forests were due to a planned logging taken by local forestry enterprises.Meanwhile,a decreased cultivated land indicates that the governmental policy of“returning farmland to forest land and grassland”has taking effects. |
| Keywords: | landscape patterns landscape dynamics landscape ecology upper reaches of the Dadu River |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《自然资源学报》浏览原始摘要信息 | |
| 点击此处可从《自然资源学报》下载全文 | |
