Community Structure Characteristic and Optimal Structuring of Green Land Plants in Changsha City

The typical plant community was surveyed by samples in Changsha,and the impacts of the type,density and crown on community landscape were analyzed one by one.The results indicated that community types in Changsha were firstly composed of deciduous broad-leaved forest and evergreen broad-leaved forest secondarily.The structure of partial communities was characterized by simplicity and high density.However,exotic plants took up dominant proportion of the species composition;but green land plants were basically identical with flora features.Correspondingly,the measures for optimizing community structure,structuring high species diversity of plant communities were put forward.