Role of the Pyrogenic Factor in the Productivity and Dynamics of the Pine Forests in Transbaikalia
M. D. Evdokimenko
V. N. Sukachev Institute of Forest SB RAS
institute_forest@ksc.krasn.ru
Keywords: pine forests, wild fires, fire damages, hydrothermal soil regime, xylogenesis, productivity of tree stands, age dynamics
Pages: 823-833
Abstract
Pine forests of Zabaikalie region growing under rainless climate are remarkable for high inflammability. Forest fires increase the limiting role of moisture in tree growth. The outward diagnostic signs were determined which characterize the xylogenesis state of trees damaged by fire. Pyrogenic fluctuations of the year-to-year tree rings are illustrated in the paper. The process of digression dynamics of pyrogenic tree stands was monitored as well. Their reparation potential becomes weaker with ageing. As a result of the permanent effect of the pyrogenic factor, the productivity of pine forests in Transbaikalia is 1.5-2 times lower than that of the pine forests in the Priangarie region.
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