Functional Traits and Influencing Factors of Spartina alterniflora in the Yellow River Delta
The functional traits of Spartina alterniiflora characterize its adaptation strategies to the environment.In this study,we investigated the density,plant height,biomass and reproductive capacity of S.alterniflora in the Yellow River Delta.The results showed that:the density,root-shoot ratio and biomass of Wuhaozhuang were higher than those of the other sampling sites,while seed yield was significantly lower than those of the other sampling sites(P＜0.05).The spike density and spike rate of S.alterniiflora at Yiqian'er station and Dawenliu station were significantly higher than those at the other sampling sites,but the seed yield was significantly lower than those at the other sampling sites(P＜0.05).The adult density,aboveground and belowground biomass of S.alterniflora were significantly positively correlated with soil electrical conductivity(EC)and total nitrogen(TN)content respectively(P＜0.05),indicating that the community and individual growth of S.alterniflora were restricted by soil water,salt and nutrient conditions.The functional traits of S.alterniiflora communities at different sampling sites were mainly affected by the number of invasion years,and management at the early stage of invasion was more beneficial.Meanwhile,soil environmental factors and sexual and asexual reproduction status of S.alterniflora should be taken into account.Our results provide a basis for the effective control and management of S.alterniflora in coastal wetlands.
万方数据
维普
