Author:
Bebawi F. F.,Campbell S. D.
Abstract
This study compared the efficacy of first and second fires applied during the
early (August–September) and late dry season (October–November) on
mortality of riparian (climbing) and subriparian (freestanding) infestations
of rubber vine (Cryptostegia grandiflora R. Br.). The
impact of fire treatments on germinable seed banks of monocotyledonous and
dicotyledonous species was also determined. Individually, fire season, habitat
type and number of fires significantly affected mortality of rubber vine
plants. Late-season fires promoted higher mortality of rubber vine
(96%) than early season fires (77%), with rubber vine in
subriparian habitats more susceptible (90% mortality) than that growing
in riparian areas (68% mortality). On average, fire mortality increased
from 32% after the first fire up to 86% following 2 fires.
Sensitivity of juvenile, mature, and old rubber vine plants to fire was in the
order of mature>juvenile>old. Early fires significantly reduced seed
banks of monocotyledonous plants, particularly in riparian habitats. Late
fires significantly reduced seed banks of both dicotyledonous and
monocotyledonous plants. No rubber vine seeds were detected in the germinable
seed bank of either burnt or unburnt plots.
Subject
General Agricultural and Biological Sciences
Cited by
15 articles.
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