Abstract:
The "transient' and "persistent' components of the soil seed bank beneath a kauri forest remnant are described, recent seed rain (collected in trays over a two year period being distinguished from dormant viable seed with longevity >2 years (soil beneath trays). A total of 46 vascular plant species was recorded. Trays are dominated by 4 woody, native species, Kunzea ericoides, Coprosma arborea, Myrsine australis and Carpodetus serratus. Sub-tray samples show an accumulation of seeds from light-demanding weedy species, including many adventives, eg Solanum mauritianum, Phytolacca octandra and Cirsium vulgare. In addition, seeds of 2 woody, native species, Cordyline australis and Geniostoma rupestre, are abundant. Detrended correspondence analysis shows clear differences between floristic composition of trays and sub-trays, and between on-site vegetation and components of the soil seed bank. differences explained in terms of seed longevity, seed accumulation rates, suitability of site conditions for growth of individual species, and the role of seed dispersal agents, especially birds.
