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作 者 ：刘常富^1,2;李京泽¹;李小马¹;何兴元²;陈玮²

期 刊 ：应用生态学报 2009年 20卷 05期 页码：1125-1131

摘 要 ：基于现实的沈阳城市森林景观，模拟了4个景观格局梯度，并选取了1个与之相应的现实景观格局梯度，分析了28个景观格局指数在各梯度对景观破碎化和景观斑块形状复杂性的反映，从而筛选出描述这两种景观格局特征的适宜景观格局指数.结果表明：斑块密度（PD）和平均斑块面积（AREA_MN）在城市森林景观破碎化方面表现出较规律的变化趋势，斑块密度随破碎化程度的增加而增加，平均斑块面积随破碎化程度的增加而减小;面积加权平均周长面积比（PARA_AM）在描述景观斑块形状复杂性方面与景观格局梯度相吻合，且随斑块形状复杂性的增加而增加，能够较为准确地描述景观斑块形状的复杂性.

Abstract:Based on the existing urban forest landscape of Shenyang, four landscape pattern gradients were simulated, and one existing landscape pattern gradient in accordance with the trend of these gradients was selected. By analyzing the responses of 28 landscape metrics for landscape fragmentation and patch shape complexity to various landscape pattern gradients, preference landscape metrics were selected for describing the degree of the two landscape pattern characteristics. The results showed that patch density (PD) and mean patch area (AREA_MN) regularly responded to the change of landscape fragmentation. The increase of landscape fragmentation resulted in an increase of PD value while a decrease of AREA_MN value. Patch shape complexity of area weighted mean perimeter area ratio (PARA_AM) coincided with the gradients of landscape pattern. PARA_AM value increased with increasing patch shape complexity, which precisely characterized the degree of patch shape complexity.

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