Stimulation of seed germination [by high temperatures and charcoal] of understorey species of the northern jarrah [Eucalyptus marginata] forest of Western Australia [natural flora]
1987
Bell, D.T. | Vlahos, S. | Watson, L.E. (Western Australia Univ., Nedlands. Dept. of Botany)
Glasshouse trials measured the germination response to high temperatures and the presence of charcoal in 40 non-leguminous understorey species of the northern jarrah forest. Species producing relatively low proportions of viable and germinable seeds tended to be the long-lived resprouting species. Three species, Conostylis setosa, Trymalium ledifolium and T. spathulatum, with seed stored in the soil, were stimulated to germinate by high temperatures. Bradysporous, obligate reseeding species showed either no temperature effect or death at high temperatures. Charred wood of Eucalyptus marginata induced an increase in the proportion of Burcardia umbellata germinating under the test condititions. Relationships of the seed germination results to aspects of selection theory and fire management policy in the northern jarrah forest are also discussed.
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