Abstract
Post-fire seedling recruitment was studied at six heathland sites near Evans
Head, north-eastern NSW, in a range of habitats from dry to wet sand-heath.
Species fire responses were recorded and seedling density, seedling survival
and seedling shoot-growth rate were monitored for 3 years. There were marked
differences in total seedling density and survivorship in different habitats,
caused by several possible factors. Obligate seeders and facultative
resprouters were found to have overlapping yet broadly distinctive patterns of
seedling recruitment behaviour. Facultative resprouters as a group had
significantly lower levels of seedling density and survival than obligate
seeders. Six species exhibited ecotypic variation in mode of regeneration,
five accompanied by marked changes in seedling density. Patterns of seedling
recruitment behaviour in relation to fire response and habitat were consistent
with the theory that resprouting is a stress-tolerant regeneration strategy
and that for a given species regeneration strategy is linked with habitat
quality.
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics
Cited by
65 articles.
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