Adaptation of Floodplain Plant Community to Changes in Hydro-geomorphic Features: A Review

Changes in hydro-geomorphic features will cause spatial differences in eco-hydrological factors and soil factors, which affect the construction and succession trend of floodplain plant community, and it is of great theoretical and practical significance to clarify the mechanism of hydro-geomorphic features on floodplain plant community. This paper summarizes the research results on the resilience of wetland plant community to changes in hydro-geomorphic features, and describes the adaptation strategies of wetland plant community to changes in hydro-geomorphic features. On this basis, it is proposed to measure the micro-scale hydro-geomorphic features by "stand water depth", and try to explore the cascade relationship between ecological factors, "stand water depth" and plant functional diversity, in order to accurately assess the impacts of hydro-geomorphic changes on the ecological processes of floodplain. Centered on the "stand water depth", the hydro-geomorphic ecological niche of plants in the floodplain was determined, and the method of selecting plant species combinations with higher adaptive and restorative capacity was explored. Finally, Dongting Lake was taken as an example to illustrate the application of the resilience assessment of floodplain plant community to changes in hydro-geomorphic characteristics. The dramatic water level fluctuations of Dongting Lake are often accompanied by mechanical disturbances such as sediment accumulation and erosion, which subsequently produce diverse micro-geomorphic features. The study of the response and resilience of floodplain plant community to changes in water level and surface elevation at the micro-scale can be used to assess the succession trend of wetland plant community on the lake's floodplain and to evaluate the effectiveness of wetland protection and restoration projects.