Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effects of different replacement restoration years on population of chromolaena odorata and native plant community structure.

Abstract

In order to study the effect of replacement restoration on the control of Chromolaena odorata and the structure of native plant community, the habitats invaded by C. odorata with restoration for 3 years, 5 years, 10 years and non-restoration were taken as research objects. The density, coverage, basal diameter and biomass of C. odorata as well as the species diversity and coverage of native plant community were investigated. The method of 'space instead of time' was employed to analyze the changes in the population characteristics of C. odorata and the native plant community structure. The results showed that:(1) The density, coverage, basal diameter and biomass of C. odorata decreased significantly with the increase of restoration years, and decreased by 97.3%, 96.5%, 98.6% and 85.7%, respectively, compared with the control after 10 years restoration. The invasion of C. odorata was obviously controlled.(2) The plant community structure of the habitats invaded by C. odorata was significantly improved during the process of plant replacement restoration. The species diversity of herbaceous layer increased first, then decreased and then increased again. The coverage of herbaceous layer increased significantly after 3 years restoration and then significantly decreased with the increase of the restoration years. The species diversity and coverage of shrub and tree layers increased significantly during the restoration process. The study has shown that replacement restoration can effectively control the invasion of C. odorata, improve the stability of the native plant community structure, promote the positive succession of plant community, and strengthen the resistance of ecosystem to invasion by alien species.