The fixed sandy dune and lowland among sandy dunes act as converge of material and species flow, and they are also the source of species diffusing.
固定沙丘和丘间低地是物质流和物种流的汇， 同时又是重要的物种扩散的源。
Landscape pattern indices showed that moving dune was disturbed strongly and fixed sandy land was of more expansionary property.
植被类型尺度的格局指标表明，流动沙地表现出受到强烈干扰的特征，而固定沙地油蒿群落具有较强的扩张特性。
The analysis to sandy desertification land types shows that the moving sand dune decreases, semi-fixed sand dune and fixed sand dune increase.
从沙化土地类型上分析，流动沙地面积减少，半固定、固定沙地面积增加。
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