干旱区生态环境知识资源中心(Arid): 非洲大陆生态地理格局与土地利用生态风险问题

Arid

	非洲大陆生态地理格局与土地利用生态风险问题
其他题名	Eco-geographic Pattern and Land Use Ecological Risk in African Continent
	王秀红; 申建秀; 张镱锂
来源期刊	中国农学通报
ISSN	1000-6850
出版年	2014
卷号	30 期号:26 页码:139-143
中文摘要	为了探讨生态脆弱区土地退化与土地利用的可持续性问题,开展非洲大陆生态地理格局与土地利用生态风险问题的研究十分必要。本研究根据非洲大陆温度带、干燥度、地形、植被等格局分布数据,利用GIS技术对研究区进行了生态地理格局的划分,并利用景观指数模型分析了各生态地理区的基本特征,最后对非洲大陆土地利用过程中的生态风险问题进行了宏观探讨。结果表明:(1)非洲大陆可划分为:西北山地区、北部荒漠区、中北过渡区、中部盆地区、东部裂谷高原区、南部高原区6个生态地理区,进一步可划分出32个亚区;(2)干旱化空间走向(干旱核心区)为北部荒漠区中部、东部裂谷高原区东部和南部高原区西南部;(3)在人类土地利用活动增强的前提下,围绕中部盆地湿润地区的半干旱和亚湿润干旱区发生沙漠化的风险极大,而地形起伏较大而且降水丰沛的地区发生土壤水蚀的风险极大。
英文摘要	Land degradation and land use sustainability in ecologically fragile areas have attracted much attention in recent years, and it is necessary to study the eco-geographic pattern and land use ecological risk in such areas. African continent is one of the typical areas on the earth, which has ecologically fragile conditions.Based on the distribution data of temperature zone, dryness, terrain and vegetation, the eco-geographic regions in African continent were divided by using GIS software and landscape index model was introduced to give descriptions to each region. Also, the land use ecological risks in African continent were discussed at regional scale. It was found that: the eco- geographic pattern in African continent could be divided into 6 regions (northwestern mountainous region, northern desertification region, north- central transitional region, central basin region, eastern rift valley plateau region and southern plateau region), and 32 sub-regions. Spatial trend of drought (arid core area) was toward the central part of northern desertification region, north part of eastern rift valley plateau region and southwest part of southern plateau region. With increasing human land use activities, semi- arid and sub- humid arid areas around central basin region would be affected by land desertification risks, and areas with undulating terrain and abundant rainfalls would be affected by soil water erosion risks, respectively.
中文关键词	非洲大陆 ; 生态地理格局 ; 生态风险 ; 农业可持续性
英文关键词	African continent eco-geographic pattern ecological risk agricultural sustainability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5265665
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232102
作者单位	中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	王秀红,申建秀,张镱锂. 非洲大陆生态地理格局与土地利用生态风险问题[J]. 中国科学院地理科学与资源研究所,2014,30(26):139-143.
APA	王秀红,申建秀,&张镱锂.(2014).非洲大陆生态地理格局与土地利用生态风险问题.中国农学通报,30(26),139-143.
MLA	王秀红,et al."非洲大陆生态地理格局与土地利用生态风险问题".中国农学通报 30.26(2014):139-143.