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分析了云南金沙江流域退化林地的类型、群落特征和物种多样性,结果表明,该区域退化林地类型丰富,但各类型结构简单,垂直分布不明显。物种多样性指数在乔、灌层按落叶常绿阔叶混交林>常绿阔叶林>针阔混交林>针叶林>灌丛的顺序递减,草本层按针叶林>针阔混交林>落叶常绿阔叶混交林>常绿阔叶林>灌丛的顺序递减。退化程度大的类型,物种多样性表现为草本层>灌木层>乔木层,退化程度较小的类型表现为灌木层>乔木层>草本层。
The types, community features and species diversity of degraded forestlands in Yunnan Jinsha River Basin were analyzed. The results showed that the degraded forestland types in this area were rich, but the structure of each type was simple and the vertical distribution was not obvious. The species diversity index decreased in order of deciduous evergreen broad-leaved mixed forest> evergreen broad-leaved forest> mixed coniferous and broad-leaved forest> coniferous forest> > Deciduous evergreen broad-leaved mixed forest> evergreen broad-leaved forest> shrubs decreased in order. In the species with a large degree of degradation, the species diversity showed as herb layer> shrub layer> tree layer, and the less degraded types appeared as shrub layer> tree layer> herb layer.