We studied whether the evolutionary of plants reproductive phenology in peat swamp in relation with seed predation. Over two years, we observed seed productivity using seed traps; conducted an artificial jackfruit seeds experiment to investigate the change of potential seed predation ratio for each period and each forest. Potential seed predation ratio is the first index indicates the percentage that seeds are damaged by seed predator if plants with seed having least chemical and physical defenses produce seeds. A mass wild seeds experiment was carried out to favorite index. Favorite index is the second index indicates which species have higher risks of predation. In addition, we added ground water level data as the limiting factor of predator痴 activity. Our greatest fruit of this study was to be clear that plants produce seeds escaping post-dispersal seed predation phenologically in this forest. The strategy was, however, different with predation satiation that utilized large amount seed productivity that explained in mast-fruiting phenomenon. The indices are useful to investigate the relation between seed predators and phenology in seed productivity in various forests and allow us to do the comparative study.

Keywords: potential seed predation, favorite index