“…In this Themed Section, two papers addressed plant invasions in wetland ecosystems and nonhydrophyte species that exist in re-flooding conditions. Wang et al (2022) conducted a field experiment in Jinchuan wetland under different water level conditions (high water level: 6-7 cm; low water level: 1.5-2.5 cm). The above-ground biomass, the heights and areas of tussocks, the names and number of species on each tussock were measured, the proportions of non-hydrophyte species (PNH) were calculated.…”