适宜物种的筛选是消落区植被恢复的关键，消落区植被调查、土壤种子库研究能有效筛选到大部分的适宜物种。适宜植物的耐水淹机制研究有利于阐明消落区植物群落自我维持机制，指导植被恢复。本项目利用植物生态生理学和恢复生态学的基本原理和方法，开展松涛水库消落区植被恢复适宜物种的筛选及耐水淹机制研究。项目首先从消落区植被调查和消落区土壤种子库萌发实验研究出发，根据生长型和表型推断出消落区植被恢复的适宜植物；然后对拟定的适宜植物进行水淹耐受性检验，最终筛选出消落区植被恢复的适宜物种。对有生态和经济价值的适宜植物在形态生长、光合效率、抗氧化酶活性、碳水化合物、多胺及活性氧积累、膜脂过氧化水平等方面开展耐水淹机制研究，阐明消落区植物群落自我维持机制。研究成果可解决松涛水库消落区植被恢复中适宜物种缺乏、成活率低的关键科学难题；为热带亚热带地区大型水库消落区植被恢复大面积示范、推广提供技术支撑和科学指导。

The screening of the suitable plant species is critical for the vegetation restoration in the water level fluctuation zone (WLFZ). The field investigations of riparian vegetation and the studies of seed germination of riparian soil seed bank are beneficial and effective methods to screen the majority suitable plant species. The studies on flooding tolerance mechanisms of riparian plant species are beneficial to elucidate the self-maintaining mechanism of the riparian vegetation, and provide the guidance for riparian vegetation restoration. The studies on suitable plant species screening and flooding tolerance mechanisms for vegetation restoration in the water level fluctuation zone of Songtao Reservoir in Hainan province will be performed based on the ecological, physiological and restoration ecological principle and methods. Firstly, some assumed suitable plant species can be selected from the results of the field investigations of riparian vegetation and seed germination of riparian soil seed bank. Secondly, the suitable plant species can be determined from those assumed species through the flooding tolerance test experiments. Finally, the flooding tolerance mechanisms of some suitable plant species possessed high ecological and economic values will be elucidated based on the studies of morphological growth, photosynthetic efficiency, activities of antioxidant enzymes, carbohydrate and polyamine metabolism, reactive oxygen species accumulation, and membrane lipid peroxidation level and so on. The flooding tolerance mechanisms help explain the self-maintaining mechanism of the riparian vegetation. This research intends to cope with the key scientific difficulties for vegetation restoration in the WLFZ of Songtao reservoirs, including lack of suitable plant species and low survival rate. At the same time, it will also provide certain technological sustainment and scientific instructions for the demonstration and popularization of the large area vegetation restoration in the WLFZ, especially for the WLFZ of large reservoirs located in the tropical and subtropical regions.