Author
Zhen Song
songzhen@caas.cn
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences
Beijing
Coauthors
Guoliang Zhang, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing
Weidng Fu, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing
Yue Zhang, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing
Abstract
Alternanthera philoxeroides is an alien invasive amphibious perennial herbaceous plant with a wide range of ecological adaptability and strong asexual reproduction ability. In this study, to further reveal the main survival strategies of A. philoxeroides in different habitats, we tried to explore the difference on the phenotypic plasticity and nitrogen uptake of A. philoxeroides in three different habitats including terrestrial (I), emergent (II) and floating aquatic (III) environments. There were significant differences in biomass of different organs and nitrogen migration amount of A. philoxeroides in different habitats. Importantly, nitrogen migration amount was significantly different (P< 0.05) in three different habitats (II > III > I). The average growth rate of habitat II was 23.32% higher than III and 54.49% higher than I, respectively. The total biomass of A. philoxeroides was highest in habitat II and lowest in habitat I. The distribution of below-ground biomass showed a significant negative correlation with habitat (Ⅰ>Ⅱ>Ⅲ). The average stem biomass was 15.57% higher than leaf biomass. Plant height and internode length varied between habitats(Ⅱ> Ⅲ>Ⅰ). Therefore, it displays stronger phenotypic plasticity and adaptability to heterogeneous environment in amphibious habitat base on the difference of the nitrogen migration quantity and distribution pattern and biomass of different organs of A. philoxeroides under different habitats. This research reveals the clonal plant A. philoxeroides has stronger invasive ability in amphibious habitats than other two habitats. It will give great helpful to provide theoretical basis for the prevention and control of A. philoxeroides.
Keywords
Alternanthera philoxeroides
15N isotope
Element migration
Highlights
Changing the biomass investment to enhance nitrogen absorption and increasing invasion
Development promoted with the enrichment and utilization of nitrogen in the plant
Better utilization of nitrogen in aquatic habitats for the growth and metabolism of A. philoxeroides