干旱区生态环境知识资源中心(Arid): 基于景观格局的干旱内陆河流域生态风险分析以石羊河流域为例

Arid

	基于景观格局的干旱内陆河流域生态风险分析以石羊河流域为例
其他题名	The Ecological Risk Assessment of Arid Inland River Basin at the Landscape Scale:A Case Study on Shiyang River Basin
	张学斌 1; 石培基 1; 罗君 2; 刘海龙 1; 魏伟 1
来源期刊	自然资源学报
ISSN	1000-3037
出版年	2014
卷号	29 期号:3 页码:410-419
中文摘要	合理评估流域生态风险,对于优化流域景观格局、建立流域生态风险预警机制、降低流域生态环境风险、维护流域生态功能具有十分重要的意义。文章以干旱内陆河典型流域为研究对象,以三期遥感数据为基础,构建生态风险指数,结合ArcGIS的空间分析功能,对流域生态风险的时空特征进行分析,结果表明:19872010年,流域景观发生较大了变化,草地面积减少12.7310~4 hm~2,未利用地面积增加15.5910~4 hm~2;将生态风险划分为5个等级,其中低生态风险区向流域上游不断迁移,面积减少31.8910~4 hm~2,较低生态风险区向上游和中游不断延伸,面积增加29.3010~4 hm~2,高生态风险区向下游不断扩展,面积增加58.6910~4 hm~2;流域生态风险转换方式共有7种,低向高等级转化的总面积为122.5610~4 hm~2,高向低等级转化的总面积为6.12*10~4 hm~2,生态风险呈增高趋势。
英文摘要	It is significant to make a reasonable assessment of ecological risk to optimize the landscape pattern, establish the ecological risk alarm mechanisms, minimize the risk of ecological environment and maintain the ecological function in river basin. The study, based on the remote sensing data of 1987, 2000 and 2010, chooses the typical arid inland river basin as the subject, divides the study area into 20 km* 20 km risk area and analyzes the temporal-spatial distribution pattern of ecological risk in Shiyang River Basin. Proceeding from the structure of landscape ecological system, the landscape disturbance degree index, the fragile index and the loss degree index are used to build the integrated ecological risk index (ERI) in the study with the help of spatial analysis of GIS. The results show that: 1) Great changes of landscape have taken place in the study area during 1987-2010, arable, woodland and grassland area have respectively reduced by 2.4610~4 hm~2, 4.7710~4 hm~2 and 12.73 * 10~4 hm~2, while the residential land, water and unused land area have increased by 1.7910~4 hm~2, 2.58 10~4 hm~2 and 15.59 *10~4 hm~2, which mean that the predominant of arable land, woodland and grassland decrease gradually, while the predominant of water, unused land and residential land increase gradually. 2) According to scope of ERI, 5 ecological risk grades are separated by natural breaks. If 0.12 ≤ERI ≤0.17, then the ecological risk grade is extremely low; if 0.17
中文关键词	生态学 ; 景观生态风险 ; 石羊河流域
英文关键词	ecology landscape ecological risk spatial analysis Shiyang River Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5092876
来源机构	西北师范大学 ; 甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232324
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	张学斌,石培基,罗君,等. 基于景观格局的干旱内陆河流域生态风险分析以石羊河流域为例[J]. 西北师范大学, 甘肃农业大学,2014,29(3):410-419.
APA	张学斌,石培基,罗君,刘海龙,&魏伟.(2014).基于景观格局的干旱内陆河流域生态风险分析以石羊河流域为例.自然资源学报,29(3),410-419.
MLA	张学斌,et al."基于景观格局的干旱内陆河流域生态风险分析以石羊河流域为例".自然资源学报 29.3(2014):410-419.