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| Titel |
Oak ecosystem succession of the Northern Caucasus |
| VerfasserIn |
Elena Chalaya, Victor Slepykh, Natalia Efimenko, Nina Povolotskaya |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087294
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| Publikation (Nr.) |
 EGU/EGU2014-1326.pdf |
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| Zusammenfassung |
| English oak (Quercus robur L.) along with its well-known good properties has a high
sanitary-hygienic and curative potential. Its volatile metabolites (VM) influence
bacteriostatically Staphylococcus aureus 209r, oppressing it in vitro by 85% compared with the
control, and Escherichia coli by 45%. There is the least amount of epiphytic microorganisms on
the leaves of Q. robur L. compared with some tree species [1]. In addition, VM of Q. robur L.
have direct milieu (hypotensive) effects on the organism under its canopy, lowering blood
pressure by 20-25 mm Hg [2].
A.P. Kazankin (1993) [4] calculated the prehistoric formula of forest species composition
of Caucasian Mineral Waters region (Northern Caucasus): 6Qr3Crp1Fr which was based on the
theory of calcium-magnesium absorption complex. According to the theory, underground
mineral water, soil, forest litter and the leaves of ground vegetation of the area have the same
ratio of the cations Ca and Mg - calcium-magnesium index [3]. Hence oldgrowth in the region
consisted of oak (Qr) by 60%, hornbeam (Carpinus-Crp) by 30% and ash (Fraxinus-Fr) only by
10%. Currently, the formula of the forests of the region has been changed by man: 5Fr3Crp2Qr.
The proportion of oak forests has decreased to 20%, the proportion of ash has increased by 50%,
but the proportion of hornbeam hasn’t changed.
So it is relevant to restore oak forests of the region in the former ratio to other forest-forming species - ash and hornbeam. Taking into consideration the change of economic
formation of society in Russia, it is extremely important to restore natural seed oak forests.
Therein the luminance of surface areal is a limiting factor. We have calculated that the natural
recovery of oak forests is possible providing observation of optimal moisture standards and soil
fertility in combination with solar light within 10-24% from the light of open space. Measures
for promotion of oak natural regeneration in mountain resorts of the Northern Caucasus can be
found in elaborate recommendations [5]. |
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