Researches on nutrient return of litterfall in the alpine tundra ecosystem of Changbai Mountains;

Regional differentiation of the Acridoidea ecofaunas in different vegetational zones (subzones) of Inner Mongolia region;

Based on the importance of forest vegetation zones,the paper introduces buffer zone construction model of riparian vegetations in foreign countries,while it proposes the principles,process and evaluation of the vegetation belt construction in our country.

This paper expounds the definition of the riparian zone and the structure and functions of the riparian vegetational zone, probes into the present situation of domestic and foreign researches on the riparian zone, analyzes the problems existing in the current researches, and looks forward to the researches on the riparian zone.