Journal of Vegetation Science |
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Volume 7, Issue 2 |
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1996 |
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Pages 273-280 |
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Copyright 1999 Elsevier
Science Ltd. All rights reserved.
Thanos C.A.; Daskalakou E.N.; Nikolaidou S.
C.A. Thanos, Dept of Botany, Univ of Athens, Athens 15784, Greece
The post-fire regeneration of a
45-yr-old Pinus halepensis (Aleppo pine) forest, burned in July 1989, has been
studied on Mount Parnis, Attiki, Greece. Four experimental plots at various
slopes and exposures were established at altitudes of 400-450 m, and monitored
for 3 yr at 3-month intervals. Early regeneration took place abundantly, through
both resprouting and seed germination of mostly hard-seeded herbs and shrubs;
the floristic richness was high with 80 taxa. Pine seedling emergence took place
during the winter of the first post-fire year. The mean pine seedling density by
the end of the recruitment period (March 1990) was 5-6 seedlings/m2.
This density decreased slightly during late spring and considerably during
summer. During the second post-fire year only a relatively slight decline was
observed; thereafter the density was stabilized to 1-2 seedlings/m2.
Mortality follows a negative exponential curve that levels off at ca. 20%.
Height distributions throughout the three post-fire years were all positively
skewed as a result of the presence of few very tall saplings. A considerable
fraction (20%) of very short (5-15 cm) saplings were still alive 39 months after
the fire; these may constitute the sampling bank. Based on the analysis of
height distribution curves, it is concluded that the taller seedlings survived
significantly better than the shorter ones. [Journal Article; In English]
Journal of Vegetation Science |
Abstract |
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Volume 7, Issue 2 |
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1996 |
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Pages 273-280 |
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