摘要
在调查的基础上,结合有关文献和植物标本资料,对生态地位极其重要的四川盆地西缘湿性常绿阔叶林区的木本植物区系进行了分析研究。结果表明:该区木本植物丰富,有111科440属1559种,317亚种、变种和变型,其中蕨类植物1科1属1种;裸子植物8科18属30种;被子植物102科421属1845种。该区具有占主导地位的大科,拥有大量属种,但大部分科内属、种贫乏,以热带性质的科占优势;该区440属可划分为14个分布区类型和19个分布区变型,区系成分复杂;植物区系起源古老,珍稀濒危树木和特有木本植物繁多;热带成分稍多于温带成分,这与该区为常绿阔叶林地带以及该区所处的地理位置相吻合,也表明该区木本植物区系具有显著的过渡性。
According to the investigation and plant specimen data and collected documents, after analysis of wood plant flora of evergreen broadleaf forest on western edge of the Sichuan Basin, some conclusions obtained are as follows. In this region 1 876 species of wood plants are found（including 317 varieties and subspecies）, which belong to 440 genera and 111 families, including 1 species, 1 genera and 1 family of Pteridophyta, 30 species, 18 genera and 8 families of Gymnospermae, and 1 845 species, 421 genera and 102 families of Angiospermae. The flora is rich in specles,genera and families, there are many families with tropic feature, a few families have a large number of genera and species, but in many families are only found rare genera and rare species. 440 genera can be divided into 14 areal types and 19 varlety-types in the areal-types. Florlstic origin is very ancient, rare and endangered trees and the endemic wood plants are very rich, too. Tropical elements are little more than temperate ones. Judging from the percentage of the distribution types, this flora is obviously a transitional flora from the tropical to the temperate. The characteristic is in accord with this evergreen broadleaf forest region and its geographical situation.
出处
《四川林业科技》
2005年第4期16-23,共8页
Journal of Sichuan Forestry Science and Technology
基金
国家十五科技攻关项目"四川盆周山地退化天然林恢复与重建技术研究(2001BA510B0602)"的部分内容。
关键词
常绿阔叶林
木本植物
区系
盆地西缘
四川
Evergreen Broadleaf Forest, Wood Plant, Flora, Western edge of the basin, Sichuan
