论季雨林的水平地带性

 季雨林是受制于湿度因子的经度地带性植被类型，它是随着湿度条件的下降由热带雨林向热带疏林过渡的居间类型，而不是受制于温度因子的纬度地带性植被类型，不是随着温度条件的下降由热带雨林向亚热带常绿阔叶林过渡的居间类型。我国南亚热带的榕树群系、黄桐群系，以及热带北缘的青皮群系均不应是季雨林，前二者是典型的南亚热带低地常绿阔叶林或南亚热带雨林，后者则是热带雨林的一分类群。

APPROACH TO THE HORIZONTAL ZONATION OF MONSOON FORESTS

Monsoon forest is a tropical forest-type, which part or most the upper canopy trees drought-deciduous during dry season of every year, or they are deciduous subdominant species in the tree crown. Monsoon forest is a forest-type of tropical climatic moisture gradient and a foresttype transition from tropical rainforest to tropical woodland. For this reason, the viewpoint of 《China Vegetation》 (1980), i. e. monsoon forest is the northeast type of tropical forest horizonal distribution, on the one hand it developing to tropical rain forest and on other hand also transition to subtropical evergreen broadleaved forest, were uncertain.Ficus formation and Endospermum formation in the lower subtropical region are not monsoon forests, they are the lower subtropical rain forests or the lower subtropical evergreen broad-leaved lowland forests. The single dominant Vatica formation is not monsoon forest but an edaphic climax of tropical rain forest in Hainan.