铜壁关自然保护区龙脑香林种子植物区系研究

Studies on Floristic Plants Geography of the Dipterocarp Forest in Tongbiguan Nature Reserve

对铜壁关自然保护区龙脑香林种子植物名录、分布区类型和区系特征等进行了整理与分析.研究结果表明:该龙脑香林有种子植物602种,347属,103科;种子植物区系热带分布科占总科数的75.73%,热带属占93.95%,热带分布种占92.86%,而76.25%为热带亚洲分布及其变型的种类.在热带亚洲分布及其变型的种类中,又以南亚-大陆东南亚分布(变型)为主,占总种数的30.07%,从分布区类型表明铜壁关自然保护区龙脑香林植物区系是热带亚洲植物区系的一部分,并与热带喜马拉雅地区的植物区系联系更加紧密.由于特殊的地理位置,有35种区系成分仅见于此地而不见于西双版纳.

The flora of seed plants on the Dipterocarp forest of Tongbiguan Nature Reserve has been stud led. The results show that there are 602 species of wild seed plants, belonging to 347 genera, 103 families. In the floristic composition of seed plants, the families of tropical distribution make up 75.73%. The statistics of the genus areal-tapes shows that the genera of tropical distribution make up 93.95%. The species of tropical distribution make up 92.86 %, and the species of tropical Asia distribution and its subpatterns occupy 76.25%. The S Aisa-SE Asia elements occupy 76.25%, which is the main source in the tropical A- sia distribution and its subpatterns. It is a part of the flora of Tropical Asia, and this forest flora is the clo- sest affinity to the tropical Himalayas flora. 35 species come into difference obviously with the flora of seed plants on the Dipterocarp forest of Xishuangbanna Nature Reserve.