ibclogo XVI International Botanical Congess


Abstract Number: 5376
Poster No. = 1402


REGENERATION OF SCOTS PINE IN RELATION TO FIRE AGE IN THE RUSSIAN NORTHERN TAIGA


N. I. Stavrova, Komarov Botanical Institute, Prof. Popov street 2, St. Petersburg 197376, Russia


Seedlings density was analyzed in pine forests of lichen site type burned 5-210 years ago. Extreme versions of after-fire damage of stands were analyzed: sample I - fire-killed trees amount to less than 30%, sample II - fire-killed trees amount to more than 70%. In forests, belonged to sample I, maximal regrowth density (~15 ind. m2) was 30-40 years after fire. Only 0.005-0.5% of individuals, grown during the first 30-40 post-fire years, therewith, will be involved in the tree stratum in forests ~150 years after fire. In sample II forests maximal regrowth density was 5 times lower (2-3 ind. m2) than in sample I and was found 60 years after fire. In this case, 10-20% of individuals, grown during the first 30-40 post-fire years will be involved in tree stratus 150 years after fire. That means, that the extraordinary high values of regrowth density, found in sample I forests 30-40 years after fire, was a reaction of a community to the external affect, unnecessary to the tree stratus regeneration.


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