土壤2013，Vol.45Issue(1)：143-151,9.
干旱区内陆河流域景观格局及其与环境因子的关系研究——以石羊河流域为例
Spatial Gradient Pattern of Landscapes and Their Relations with Environmental Factors in the Inland River Basin of Arid Regions:A Case of Shiyang River Basin
摘要
Abstract
Based on GIS technology and moving window method, the characteristics of landscape pattern and its spatio-temporal variations of Shiyang River basin in 1987, 2000 and 2010 were analyzed. According to characteristics of natural geographic gradient of basin in 2000, two transects were set up with a sampling interval of 1 km, one was along river's flow direction (Tr1) and the other was perpendicular to river's flow direction (Tr2). The elevation, precipitation, temperature, population and GDP were taken as the environmental factors and the landscape pattern indices as the target species, the pattern of landscape gradients with environmental factors was studied by redundancy analysis of constrained ordination methods (RDA). The results showed that: 1) Unused land, accounting for a half of the total landscape, composed a major part and were the landscape matrix in Shiyang River Basin during the study period; 2) Compared to 1987, the distribution of the landscape pattern index values showed significant differences from south to north gradients in 2010, blocks dominated the landscape structures in the basin with structures in the forms of ring or banded (corridor) dispersed on it; 3) The landscape pattern indices in vertical and horizontal gradient were significant different, landscape pattern indices of Trl in 2010 was significantly lower than in 1987, while landscape pattern indices of Tr2 did not change significantly with the time; 4) The gradient changes of landscape pattern indices and environmental factors were closely correlated, gradient pattern of landscapes in Trl transect was closely correlated with elevation, precipitation and temperature, while gradient pattern of landscapes in Tr2 transect was closely correlated with temperature, population and GDP.关键词
景观/梯度格局/环境因子/移动窗口/石羊河流域Key words
Landscape, Gradient pattern, Environmental factors, Moving window, Shiyang River basin分类
生物科学引用本文复制引用
宫继萍,石培基,杨雪梅,吴文婕..干旱区内陆河流域景观格局及其与环境因子的关系研究——以石羊河流域为例[J].土壤,2013,45(1):143-151,9.基金项目
国家自然科学基金项目(40971078)资助. （40971078）
