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Soil Seed Banks in Relation to Light and Topographic Position of a Hill Dipterocarp Forest in Sri Lanka1

SEED BANKS HAVE BEEN DEFINED as those collections of seeds that can remain dormant in the surface soil until their germination is triggered by an environmental change (Grime 1979, Simpson et al. 1989). Soil seed banks are particularly important in habitats with seasonal drought, such as savanna woodland (Major & Pyott 1966); periodically inundated areas, such as salt marsh and wetland (Grime 1979); soils that are frozen, such as Arctic tundra (Archibold 1984); or habitats that are frequently disturbed, such as agricultural fields or fire-maintained grasslands (Roberts & Feast 1973).