摘要
横断山区干旱河谷植被,按植物群落的生态外貌、种类组成与结构特点,可分为4个类型(即:稀树灌木草丛,肉质刺灌丛,扭曲云南松疏林,小叶刺灌丛)15个群落。按干旱河谷的区域分异、水热状况、山地植被垂直带和利用方向,将本区干旱河谷分为4个类型(即:干热、干暖、干温、干凉)7个区。
There are arid valleys in the Hengduan Mountainous Region universally. The vegetational characters are following. 1. It is only distributed in the botton zone of the river valley, alt. 350 - 3800m; 2. The change of physiognomy with the alternating of dry and wet season in quite obvious ; 3. The vertical stratification of community is single, in which wood plants are short and to grow separatelly; 4. The community composition is main mesophyte, but the structure is xero-morphic.According to physiognomy, composition and structure of the community, the vegetation of the arid valleys in the Hengduan Mountainous Region is divided into 4 types:1. Savanna; 2. Fleshy thorn shrub; 3. Open woodland with crooked Pinus yunnanensis; 4. Shrub, with small leaves and thorn, and 15 communities.Whole area of arid valleys of the Hengduan Mountainous Region may be divided into 4 kinds and 7 regions by regional differentiation, condition of water and heat, vertical zone of mountainous vegetaion and utilizational direction. The 4 kinds are heat-dry, warm-dry, temperate-dry and cold-dry.
出处
《山地研究》
CSCD
1989年第3期175-182,共8页
关键词
植被
群落类型
横断山区
干旱河谷
the Hengduan Mountaionus Region, arid valleys, vegetation character, com- munity type, regional differentiation
