Effects of interspecific competition on the growth of invasive and native species
To explore interspecific relationship between invasive and native plants,we conducted a greenhouse experiment with two invasive plants (Alternanthera philoxeroides and Wedelia trilobata) and their native congeners (A.sessilis and W.chinensis) across monoculture and mixture plantings.Biomass and morphological indexes were measured and the interspecific relationships between species were analyzed.The results showed that:(1) Congener and heterogeneric interspecific relationship increased the biomass,root/shoot ratio and number of nodes of A.philoxeroides,but decreased the height and number of nodes of W.trilobata.(2) Congener interspecific relationship decreased the height of A.sessilis and number of nodes of W.chinensis,heterogeneric interspecific relationship increased the biomass,height and number of branches of A.sessilis,but decreased the total biomass and height of W.chinensis.(3) Congener interspecific competition had a positive effect on the growth of A.philoxeroides,while heterogeneric interspecific competition had a positive effect on the growth of A.sessilis.In future studies,relationships of cooperation and competition between invasive and native plants in the field need to be advanced to provide a theoretical basis for prevention and control of invasive plants.
Alternanthera philoxeroidesWedelia trilobataAlternanthera sessilisWedelia chinensisinvasive speciesnative species
国家科技期刊平台
NSTL
万方数据
维普
