“三江源”地区灌丛群落的种类组成、结构及外貌特征

Species composition,structure,and exterior characteristics of shrub communities in the Three- river headwater region

为了解"三江源"地区植被特征以及为合理开发利用这些植被资源提供科学依据,试验在"三江源"地区进行野外调查,并参阅有关资料对灌丛群落特征进行了分析。结果表明:灌丛群落由156种植物组成,隶属36科98属,其中有灌木8种,草本植物148种;地理成分以北温带分布为主;对生活型和叶性质进行的分析表明,该区灌丛群落的外貌主要由小型和中型膜质和草质、全缘单叶地面芽植物所决定;群落结构比较简单,大体可以分为灌木层和草本层。

To understand the characteristics of the vegetation in the Three - river headwater region, and provide a scientific basis for the rational exploitation and use of these vegetation resources. The characteristics of shrub communities were analyzed based on the field surveys by referring to the relevant data. The results showed that there were 156 species of plants in the shrub communities, belonging to 98 genera in 36 families of vascular plants. Among them,there were 8 species of shrub and 148 species of herb plants. The distribution of the north temperate occupied a dominant position in the geographical components. The analysis of both life form of the plants and their leaf characteristics showed that the exteri- or of the shrub communities was mainly decided by the hemieryptophytes with small and medium - sized, membranous and herbaceous, entire and simple foliage; and the structure of the shrub communities was relatively simple, and could be commonly divided into two parts： the shrub layer and the herb layer.