Abstract:

In this research,a case study in Qingpu District of Shanghai was conducted to determine the impacts of land use changing on riparian habitat and plant community composition.A total of 48 riparian sites in six different land use types were investigated and analyzed.At present,the quality of riparian habitat in Qingpu could be ranked in the order of:wild land>green space>agricultural land>transportation land>residential land>industrial land.The main reason of this result was the changes of bank type,the width and gradient of the riparian zone,and the original vegetation as the land use type varying.A total of 118 plants from 51 families were found in Qingpu riparian zone.The highest value of average richness appeared in green space,while the lowest in industrial land.Plant community compositions in six land use types were significantly different from each other in respect of life form and origin.Industrial land suffered intensive disturbance and the percentage of the alien invasive plants was as high as 27.22%.The average richness of grass species in agricultural land was 11.75,which was the highest value in six land use type.The percentage of artificial plants in transportation and residential land were as high as 37.77% and 4997%,respectively.In green space,the life form was in a relatively balanced state,and the percentage of artificial plants was 64.05%.Wild land lacked trees and bushes,and the percentage of the natural distributing plants was as high as 69.94%.This article enriched the researches on the impacts of land use changing on riparian habitat and plant community composition in plain river network area,and could be helpful to the restoration and management work of riparian zone in future.