Abstract:Ant-mediated seed dispersal is ecologically important and geographically widespread. Previous studies revealed that seed-carrying ant may impact the rate of seed removal and dispersal distance, and the resultant short-term fate of seed, i.e. the seed location where the ants release after ant manipulation. The impact of ant recruitment and behaviour on seed dispersal of the cogeneric plant taxa, however, is relatively little known. We investigated the ant-mediated effect on seed dispersal of two cogeneric plants, Corydalis wilfordii and C. racemosa (Papaveraceae), in a subtropical evergreen forest at the Jiugongshan mountain (Hubei Province, China). The seed size of C. wilfordii is larger than that of C. racemosa, while the elaiosome/seed mass ratio of C. wilfordii is greater than that of C. racemosa . Being the mutual ant dispersers of the two Corydalis taxa, Pristomyrmex pungens (with mass recruitment mode, i.e. to recruit a large number of ants to remove seeds when one ant found seed) and Prenolepis sphingthorax (with simple cooperative recruitmen mode, i.e. to recruit 5-30 ants to remove seeds when one ant found seed) played a varied role in seed dispersal of two plants. Pristomyrmex pungens carried about 44% of the C. wilfordii seeds transported by it to the nests, with the average dispersal distance of 1.85 m and the removal number of seeds per hour of 43.8, while the rest seeds were removed elaiosomes in situ and/or on the way to the nest. Prenolepis sphingthorax carried all seeds of the C. wilfordii to nests, with the average dispersal distance of 0.45 m and the removal number of seeds per hour of 7.3. In addition, both Pristomyrmex pungens and Prenolepis sphingthorax carried the all seeds of C. racemosa to the nests, with the average dispersal distance of 6.27 m and 6.65 m, and removal number of seeds per hour of 34.2 and 10.6 respectively. The results suggested that seed removal rate of ant with mass recruitment was higher than that of ant with simple cooperative recruitment. The seed dispersal distance and short-term seed fate differed between the two studied plants, depending on ant foraging strategies and behavior and seed characteristics. The discussion of the role of seed characteristics was also presented in the paper.