Abstract: Aims Leaf nutrient resorption is an important mechanism for plants to adapt to nutrient limitation or extreme environments. However, the nutrient resorption characteristics and ecological strategies of wetland emergent plants in adapting to specific environments remain unclear. Methods This study focuses on 12 typical emergent plant species from the lakeshore zone of Dianchi Lake, with 471 plant samples collected from mature and senescent leaves during the mature and senescent phases. The aboveground biomass of plants in 70 sampling plots was also investigated. Based on the measurement of leaf nitrogen (N) and phosphorus (P) content, the changes in nutrient resorption efficiency and stoichiometric ratios of different emergent plants were studied to reveal their intrinsic. Important findings (1) The resorption efficiencies of nitrogen (N) and phosphorus (P) differed significantly among all plant species. Zizania latifolia and Iris pseudacorus exhibited the highest N and P resorption efficiencies (66.17% and 56.22%, respectively), while Typha orientalis and Cyperus alternifolius ssp. flabelliformis showed the lowest (46.13% and 42.78%, respectively). (2) The mean leaf N:P ratio of typical emergent plants was 11.42 (<14), and the resorption efficiency ratio (NRE:PRE) was 1.25 (significantly greater than 1), indicating that the emergent plants along the Dianchi Lake shore are overall N-limited. Under these conditions, the N resorption efficiency (56.43%) of the emergent plants is higher than the P resorption efficiency (49.62%), further highlighting the plants' preferential absorption of N, which is more limiting. (3) Compared with other plants, Arundo donax var. versicolor exhibited the strongest accumulation capacity for N and P (399.67 g·m-2 and 49.32 g·m-2, respectively) and the highest removal potential (61.19 g·m-2 and 8.63 g·m-2, respectively). Furthermore, the plant's aboveground biomass, N and P content, and nutrient resorption extent collectively determine the harvesting management strategy, which in turn affects the N and P removal efficiency of wetland plants. (4) In the nutrient resorption process of typical emergent plants, three strategies coexist: nutrient concentration control, nutrient limitation control, and stoichiometric control, with stoichiometric control being the dominant strategy. The findings reveal the characteristics and corresponding ecological strategies of nutrient resorption, nutrient accumulation, and biomass removal in typical emergent plants of the Dianchi lakeshore zone, providing important references for harvest management of emergent plants based on nutrient blocking techniques.

Key words: Emergent plants, nutrient resorption, resorption strategy, stoichiometry, eutrophication