Conclusions
Functional traits of WT and WC played important role for the success of their growth under nitrogen enrichment and flooding conditions. According to the results, dry weight, and morphological traits of WT were significantly higher than WC under combination of flooding and additional nitrogen (F.N and F.2N), due to higher resource acquisition ability of WT over WC. LN and CHI of WT was significantly lower than WC; this may confer higher resistance to WT under the adverse environments. Higher phenotypic plasticity and negative effect of competition of WT over WC under combination of flooding and additional nitrogen (F.N and F.2N), make WT more successful within these complex environments. This study helped us to understanding the role of functional traits for the successful invasion of invasive plant species.