Table 7. Water regime required for recruitment and regeneration of all species. In some instances rainfall will provide sufficient water for regeneration. Species Precondition Flood Follow-up flood Depth of flood Flood (flowering (years) seedling duration stimulus/fruiting establishment (weeks) stimulus) Eucalyptus Water 24–36 Recession For lower 20–50 cm (soil 4–6 camaldulensis mths prior to Spring/early Murray summer moisture subsp. seed fall; summer (or germination- camaldulensis flowering flood sufficient follow-up (or induced in rainfall); sufficient stressed trees; artificial rainfall) above av. Rain watering to for bud set extend effect Eucalyptus Unknown Unknown Unknown Unknown Unknown camaldulensis subsp. acuta Eucalyptus Aseasonal Recession Summer 4 cm 4 weeks after largiflorens induced spring-summer germination (or 2 months of flowering (or local local rainfall) age May–Oct): rainfall) tree condition artificial flood not so useful. Eucalyptus Flowering Summer-late Unknown; not Unknown Unknown coolabah dependent on summer (but required? (c.f. subsp. tree condition; other factors Freudenberger coolabah intermittent important e.g. 1998) rather than rainfall); annual? episodic Eucalyptus Unknown Unknown Unknown Unknown Unknown coolabah subsp. excerata Acacia Not important Unknown; seed Unknown Unknown Unknown stenophylla fall from spring to summer; artificial not so useful Duma Flowers in seed fall in 9–12 months <15 cm 3 months florulenta response to rain response to after and flooding germination aseasonal?
Table 7. Water regime required for recruitment and regeneration of all species. In some instances rainfall will provide sufficient water for regeneration. Species Precondition (flowering stimulus/fruiting stimulus) Flood Follow-up flood (years) Depth of flood seedling establishment Flood duration (weeks) Eucalyptus camaldulensis subsp. camaldulensis Water 24–36 mths prior to seed fall; flowering flood induced in stressed trees; above av. Rain for bud set Recession Spring/early summer (or sufficient rainfall); artificial watering to extend effect For lower Murray summer germination- follow-up (or sufficient rainfall) 20–50 cm (soil moisture 4–6 Eucalyptus camaldulensis subsp. acuta Unknown Unknown Unknown Unknown Unknown Eucalyptus largiflorens Aseasonal induced flowering May–Oct): tree condition Recession spring-summer (or local rainfall) artificial flood not so useful. Summer germination (or local rainfall) 4 cm 4 weeks after 2 months of age Eucalyptus coolabah subsp. coolabah Flowering dependent on tree condition; intermittent rather than annual? Summer-late summer (but other factors important e.g. rainfall); episodic Unknown; not required? (c.f. Freudenberger 1998) Unknown Unknown Eucalyptus coolabah subsp. excerata Unknown Unknown Unknown Unknown Unknown Acacia stenophylla Not important Unknown; seed fall from spring to summer; artificial not so useful Unknown Unknown Unknown Duma florulenta Flowers in response to rain and flooding seed fall in response to aseasonal? 9–12 months after germination <15 cm 3 months
Review%20of%20Water%20Requirements%20for%20Floodplain%20Vegetation_final.docx