云南金沙江流域退化林地群落特征研究

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。

Community Feature of Degraded Forest along the Reaches of Jinshajiang in Yunnan Province

The type, community feature and species diversity of the degraded forest along the reaches of Jinshajiang river in Yunnan province were analyzed. It was found that there were six degraded forest types which were simple on structure and the layer and vertical distribution phenomenon was not obvious. The species diversity index showed deciduous evergreen broadleaf mixed forest >evergreen broadleaf forest >needle broadleaf mixed forest >needle forest>shrub in tree and shrub layers, and needle forest >needle broadleaf mixed forest >deciduous evergreen broadleaf mixed forest >evergreen broadleaf forest>shrub in herb layer. Within the serious degraded forest, the species diversity index showed herb layer>shrub layer>tree layer,and within the slightly degraded one, the species diversity was shrub layer>tree layer>herb layer.