干旱区生态环境知识资源中心(Arid): 半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例

Arid

	半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例
其他题名	Analysis on the Fragmentation Trend of Sandy Landscapes in the Semi-arid Areas--A Case Study in Horqin Sandland
	常学礼; 于云江; 曹艳英
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2004
卷号	21 期号:1 页码:21-26
中文摘要	采用RS和GIS手段,对科尔沁沙地典型地区不同时期的农田和固定沙丘景观数量和形状破碎化的趋势进行分析,结果表明农业生产活动对农田景观的影响主要表现在对斑块数量破碎化的影响,而对斑块形状破碎化的影响不大.放牧过程对固定沙丘景观破碎化的影响非常显著,这一过程不仅影响到斑块数量破碎化,而且也影响到斑块形状破碎化.回归分析结果,二者为较复杂的抛物线型关系.此外,沙漠化过程对农田和固定沙丘景观破碎化影响的关联分析表明,沙漠化过程与所有的破碎化指数呈负关联.其中,除农田形状破碎化指数外,其他破碎化指数与沙漠化过程无显著的关联,说明随着沙漠化程度的增大,农田斑块的形状简单化的趋势也加强.
英文摘要	In this paper, the spatial distribution information of the croplands and the fixed dunes in the typical regions over Horqin Sandland is derived by means of RS and GIS, and the quantity and fragmentation trend of the croplands and fixed dunes are analyzed. The results show that the impacts of farming activities on the frag-mentation of patch quantity are more obvious than that on the fragmentation of patch shape. The impacts of farming activities on the cropland landscapes are characterized by the stages and the complexity. There is a posi-tive correlation between the fragmentation index of patch quantity and the cropland index when the cropland in-dex varies in a range of 5.71-6. 11, a negative correlation between them when the cropland index varies in a range of 6. 12 ~ 7. 64, and a positive correlation again when the cropland index is higher than 7 . 64. The impacts of grazing on the fragmentation of the fixed dune landscapes are significant, and the grazing not only affects the fragmentation of patch quantity but also the fragmentation of patch shape. Viewing from the results of regres-sive analysis, there is a complicated parabola linear relationship between them. Moreover, the correlative analy-sis on the impacts of desertification on the fragmentation of the cropland and fixed dune landscapes reveals that there is a negative correlation between the desertification and all the fragmentation indexes. In which there is no significant correlation between the desertification and other fragmentation indexes except the fragmentation in-dex of cropland shape, which reveals that the simplification trend of the cropland patch shape increases with the increase of desertification.
中文关键词	农田 ; 固定沙丘 ; 破碎化 ; 沙地景观 ; 半干旱地区
英文关键词	cropland fixed dune fragmentation sandland landscape semi-arid area
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Geology
WOS研究方向	Geology
CSCD记录号	CSCD:1500094
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205045
作者单位	常学礼, 烟台师范学院地理与旅游系, 烟台, 山东 264025, 中国.; 曹艳英, 烟台师范学院地理与旅游系, 烟台, 山东 264025, 中国.; 于云江, 北京师范大学资源科学研究所, 北京 100875, 中国.
推荐引用方式 GB/T 7714	常学礼,于云江,曹艳英. 半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例[J]. 北京师范大学,2004,21(1):21-26.
APA	常学礼,于云江,&曹艳英.(2004).半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例.干旱区研究,21(1),21-26.
MLA	常学礼,et al."半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例".干旱区研究 21.1(2004):21-26.