Lianas as a New,Suddenly Arised Force--Description and Review of Lianas Literatures

The systematic and synthetic description and review of lianas,chiefly distributed in tropic,are described and reviewed in this paper,in which some ecological questions of lianas are included as follows:(1) The conception and significances of lianas;(2)Liana flora and its distribution in the world;(3)Its biological characteristics;(4)Its ecological characteristics;(5)Its abundance(density)and species-richness in tropical forest;(6)The ecological significance of lianas-aggregation in gap and the va-fiance of its abundance in the process of forest succession;(7)The relationship between lianas and trees;(8)The positive and the negative contribution of lianas to tropical forest;(9)The types of climbing mechanism of lianas and its competitive predominance;(10)Global climate-variance(CO₂ increase)pro-motes abundance of lianas to increase，and some ecological consequence are resulted from which．