Seed rain and seedling survival are major factors limiting vegetation regeneration on rehabilitated quarries

摘要: To evaluate factors limiting vegetation regeneration, studies of seed rain, seedling emergence, and survival were carried out on different phases three different-aged quarries in Hong Kong. Seed-rain results showed that 1,741 seeds from 35 woody species collected 160 traps a 1-year period. Older sites had higher number than younger sites. In terms number, 68 % dispersed by birds, whereas 30 2 wind civets, respectively. situ emergence experiment most the 12 under field conditions, which implied was not limitation regeneration. Most emergent seedlings finally died, significant correlations with adverse microhabitat conditions. It concluded although rain contained some native species, it may still be insufficient order to accelerate natural regeneration at later successional stages our local quarries. Management strategies should take into account possibility enhancing dispersal improving Using fleshy fruits attract birds enrichment planting is strongly recommended, postplanting care essential quality development rehabilitated ecosystem.