摘要
研究了 9a草地恢复演替系列中斑块边界形状和斑块面积分布动态 ,并进行了尺度转换分析。獐茅斑块的边界分维数和斑块化指数最高 ,羊草斑块的较低 ,碱蓬斑块的斑块化指数略小于羊草斑块 ,边界分维数大于羊草斑块。其他类型斑块的两种指数基本上介于獐茅斑块和羊草斑块之间。斑块化指数的年际变动滞后于斑块边界分维数。斑块边界分维数在整个试验的尺度范围内符合同一自相似规律 。
Patch boundary shape and patch size distribution in 9 year restoration succession was studied scale transition points were determined using fractal method.Both fractal dimension of patch boundary and patchiness exponent of Aeluropus littoralis were the highest,and that of Aneurolepidium chinense were lower.Patchiness exponent of Suaeda glauca was a little lower than that of Aneurolepidium chinense and fractal dimension of patch boundary was higher.Dynamics of patch size distribution lag behind patch boundary shape.Fractal dimension of patch boundary has no scale transition at all scale in this study and patch size distribution shows scale transition which indicates different fractal characteristics at different scales.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第4期587-593,共7页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目!(No.39899370)
国家基金重点资助项目!(39730110)
关键词
斑块边界
斑块面积分布
分形指数
尺度转换
草地
patch boundary
patch size distribution
fractal exponent
scale transition
