Aspects of the dynamics of the seed‐banks and seedling populations of Acacia victoriae and Cassia spp. in arid western New South Wales
作者： A. C. GRICE , MARK WESTOBY
DOI: 10.1111/J.1442-9993.1987.TB00944.X
关键词: Range (biology) 、 Cassia 、 Acacia victoriae 、 Germination 、 Ecology 、 Biology 、 Seedling 、 Botany 、 Agronomy 、 Arid 、 Nemophila
摘要: Acacia victoriae, Cassia nemophila and C. phyllodinea are shrubs which occur throughout large areas of arid semi-arid Australia. This paper examines aspects the dynamics seed-banks seedling populations these plants to determine their influence upon recruitment frequency. Seed-banks in soil large, ranging from 50 3900 seeds m-2for A. victoriae 5 400 spp. A proportion (ca. 80%) viable. Seedling densities soon after emergence range up 25.7 21.7 Any individual cohort seedlings represents only a small (< 6%) total seed-bank. Most viable fail germinate even when adequate moisture is available. mortality rates high 100%) during first 12 months germination. If intermittent, it most likely result low survival rather than infrequent
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