Effects of Herbivory and Competition on the Invasive Ability of Alien Species Myriophyllum aquaticum
In this paper,the invasive plant Myriophyllum aquaticum was taken as the target plant,and the interference factors were set with the competition of Vallisneria natans and the herbivory of Pomacea canaliculata to explore the effects of herbivory of P.canaliculata and competition of V.natans on the invasion of M.aquaticum.The results showed as follows:(1)The plant height and biomass of M.aquaticum were significantly decreased by P.canaliculata herbivory and V.natans competition,and the growth of M.aquaticum was inhibited.(2)Compared with the control,the biomass and plant height of M.aquaticum were significantly reduced under the combined treatment of herbivory of P.canaliculata and competition of V.natans.The superposition of these two factors enhanced the inhibition of M.aquaticum,but there was no significant interaction between herbivory and competition.(3)Under the combined influence of competition and herbivory,the logarithmic response ratio(ln RR)of M.aquaticum was not significantly different among different herbivory densities of P.canaliculata,and all were negative,indicating that V.natans inhibited the growth of M.aquaticum than that of P.canaliculata herbivory.Therefore,in the future water ecosystem restoration,the reasonable dense planting of V.natans can be used to control the invasion of M.aquaticum.
国家科技期刊平台
NSTL
万方数据
