CHANGEABILITY OF LEVELS OF ADAPTATION OF THREATENED WOODY SPECIES OF RUSSIAN FLORA, INTRODUCED AT SAINT-PETERSBURG DURING THE LAST 100 YEARS
G.A. Firsov, A.V. Volchanskaya
Komarov Botanical Institute RAS, 197376, Saint-Petersburg, Prof. Popov str., 2
gennady_fi rsov@mail.ru, botsad_spb@mail.ru
Keywords: introduction, levels of adaptation, threatened species, woody fl ora of Russia
Abstract
Th e gardener of Imperial Forest Institute Egbert Wolf (1917) tested the largest amount of woody species at Saint-
Petersburg, with 46 species which now are included into the Red Data Book of Russian Federation. Till recently the
main ideas on winterhardiness of woody exotic plants have been based on Wolf s data. In conditions of the warming
of the climate which has strenthened since the end of the 1980s, the amount of non-hardy species has diminished, at
the the same time the amount of hardy species has enlarged. Th ere are more species which reach its reproductive
state, and 4 of them produce the self-sowing.
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