景观格局变化研究，是目前景观生态学的研究热点。
Study on the Landscape pattern change is the research hotspot of the Landscape Ecology at present.
分析了梭梭种群的径级结构、高度结构、密度和空间分布格局变化等。
The diameter structure, the height structure, the density and the distribution pattern were worked out.
结果表明：（ 1 ）影响乔木、灌木和草本层植被格局变化的首要因子都是地形特征；
The results are as following: (1)The topographic characteristics are critical for the spatial variations of vegetation.
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