神农架南坡表土孢粉植物群初步研究

摘要

Some samples are gained from the south slope of Shennongjia mountain a nd five sporo-pollen zones are distinguished from the piedmont to the summit. Fi ve main polynofloras are as follows: evergreen broadle forest of subtropics be low 800 m a. S. L, evergreen and deciduous broadleved mixed forest of subtropics between 800～1400 m a. S. L, deciduous broadleved forest of warm temperate bet ween 1 400～1 850 m a. S. L, conifer and broadleved mixed forest of temperate be tween 1 850～2 500 m a. S. L, conifer forest of cold temperate above 2 500 m a. S. L. The polynofloras reflect the basic features of the modern plantation in Sh ennongjia region. They are identical in the vegetation type, the number and spat ial distribution of vegetation zones. They are similar in the height bounds of vegetation zones as well as component and its percentage of some plants.%神农架南坡表土孢粉分析表明，从山麓到山顶可以划分出五个特征明显的孢粉带，代表五个不同高度带内的主要植物群落。它们基本反映了现代植被的整体特征，在群落类型和主要成分等方面具有一致性，在种属数量、相对比率和分布高度等方面基本相似，略有差异。