The community characteristics for invading damage of the forest killer-Merremia boisiana

Merremia boisian,a harmful exotic weed in Guangzhou,has strong asexual reproducibility,high percentage of rhizome,clear growth strategy and no natural enemy.Ninety square meters in Longdong forestry centre were investigated in December 2004,and aboveground biomass of twelve square meters plots was harvested.This large perennial liana commonly grows together with other vines such as Embelia ribe and Mussaenda pubescens.It can climb to tall tree crown and cause damage by forming a cover on the canopy,especially to Acacia mangium.This invasion may alter nitrogen cycling,and the consequences for community structure are poorly demonstrated.