Abstract: We established 50 seed rain traps in a 5 hm² forest plot in Baishanzu National Natural Reserve to study the composition and temporal dynamics of seed rain in community of Baishanzu broad-leaved evergreen forest. We collected seeds and fruits twice a month during 2009-2012, then identified and divided into four types, including mature fruit, immature fruit, young fruit and seed, and counted by types. During the four-year research period, we collected 13 627 fruits and 10 132 seeds, including 5 632 mature fruits accounting for 41.33%, belonging to 47 species, 30 genuses and 16 families. Six dominant species' mature fruits took a comparatively low rate in total fruit number of that species, showing the feature of r-stratagem in Grime's theory. There was no significant correlation (P>0.05) between the important value of the dominant species in the plot and their seed density, indicating the different conditions between seed rain and life history pattern afterwards. The asynchrony in seed rain dispersal peak time can relieve interspecific competition and increase species co-existence. The seed rain density of dominant species, except Schima superba and Cyclobalanopsis multinervis, showed obvious interannual variability.

Key words: Baishanzu, seed rain density, reproductive strategy, dominant species, species coexistence