Dynamics of Structure and Biological Productivity of Post-Fire Larch Forests in Northern Mongolia
I. M. DANILIN1, Z. TSOGT2
1V. N. Sukachev Institute of Forest SB RAS, 660036, Krasnoyarsk, Akademgorodok, 50/28
2Institute of Botany Mongolian Academy of Sciences, Mongolia, Ulaanbaatar - 51, Zukov str., 77
Keywords: post-fire larch forests, dynamics, structure, biological productivity, Northern Mongolia
Abstract
Peculiarities of forming and growth of post-fire larch (Larix sibirica Ledeb.) forests at the southern range of their distribution in Northern Mongolia were studied. Regularities of the stand structure and dynamics of biological productivity were analyzed and discussed in the paper. It was proved that the structure of the organic mass of the post-fire herb-carex type larch forests at the southern border of forest vegetation distribution is closely related to their biometric indices: age, density and productivity. In comparison to tree stands from other areas of forest vegetation the total phytomass stock of larch phytocenoses increases by zonal gradient from forest-tundra border to Transbaikalian southern taiga and northern regions of Mongolia. Regeneration of forest cover by the edificator and formation of the original larch coenopopulation are positive trends from the ecological point of view, because Siberian larch forests in the area have sufficiently high growth energy and rate of phytomass production during young and middle-age periods, absorbing twice more carbon from the atmosphere than mature forests. It also has positive values of carbon balance and total decomposition of organic matter (“in-out” parameters).
|
