艾比湖流域景观结构及其与环境因子关系分析

Analysis on the landscape structure of Ebinur Lake basin and its relationship with environmental factors

以艾比湖流域为研究对象,采用Fragstats3.3的标准法和移动视窗法先后分析了流域景观结构及其空间分布特征;然后,针对流域本身自然地理环境特点,分别设置了两条样带,获得了景观指数沿两个样带方向的变化数据;最后,以高程、降水、气温、地温、人口和GDP为环境因子,以景观指数值为目标物种,利用去趋势典范对应分析方法研究了景观结构与环境因子的关系。结果表明:艾比湖流域景观结构简单,景观类型所占比例较为均衡,斑块多以相邻大斑块拼接而成,破碎化程度低,荒漠作为基质在景观类型中占据着优势地位,景观指数变化较大的地区多处于两种不同景观类型之间的过渡地带,自然环境对景观结构的影响比社会环境影响更大。

According to the natural geographical features of Ebinur Lake basin,two transects were set up.The first transect represents semi-natural landscape that was affected by human activities,and the second transect represents natural landscape transect.Along the two transects,the change information of landscape structure was acquired.Taking the elevation,precipitation,air temperature,ground temperature,population and GDP as environmental factors,the value of landscape index as the target species,the DCCA method was used to study the relationship between the target species and its environmental factors.The results show that different landscape regions had the different characteristics in landscape structure.Natural environment and social environment had different effects on landscape structure.