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作 者 ：石培礼, 刘兴良

期 刊 ：植物生态学报 2002年 26卷 2期 页码：189-194

关键词：林线；交错带判定；游动分割窗技术；

Keywords:Timberline, Ecotone determination, Moving split-window technique,

摘 要 ：以样带上样方间的距离系数为指标，采用游动分割窗技术辨析了岷江冷杉(Abies faxoniana)林线附近交错带的位置和宽度。结果表明，Bray-Curtis距离、相对欧氏距离、弦距离与平方欧氏距离的峰值和峰宽具有很好的重合性，上述距离系数均能作为判定林线交错带群落的边界和宽度的优良指标，其中，平方欧氏距离更能直观和准确地反映交错带植被的变异。样带上距离系数的峰值区和峰宽对生态交错带的位置和宽度有较为敏感的指示意义，游动分割窗技术是交错带判定和群落划分的有效方法。以样带上样方间的距离系数为指标，采用游动分割窗技术辨析了岷江冷杉(Abies faxoniana)林线附近交错带的位置和宽度。结果表明，Bray-Curtis距离、相对欧氏距离、弦距离与平方欧氏距离的峰值和峰宽具有很好的重合性，上述距离系数均能作为判定林线交错带群落的边界和宽度的优良指标，其中，平方欧氏距离更能直观和准确地反映交错带植被的变异。样带上距离系数的峰值区和峰宽对生态交错带的位置和宽度有较为敏感的指示意义，游动分割窗技术是交错带判定和群落划分的有效方法。

Abstract:The distance coefficients of sampling plots along on ecotone transect were applied in the moving split-window technique for determining ecotone position and width in the area across the Abies faxoniana timberline ecotone in Balang Mountain, on the southeast edge of the Qinghai-Tibetan Plateau. The result showed that distance coefficients, such as Bray-Curtis percent dissimilarity, relative Euclidean distance, chord distance, squared Euclidean distance, coincide in peaks and width in the transect. Among them, the squared Euclidean distance is the best one to show the variation of ecotone in the moving split window. The peaks and widths of space coefficients are sensitive indicators for those of ecotones. Therefore, moving split-window technique is an effective method for ecotone determination and community classification.

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