We analyzed the time-course of carbon accumulation in the stem wood of the basic forest-forming tree species (pine, spruce, and birch) of the taiga subzones in northeastern Europe over many years. The dynamics of annual carbon accumulation was appraised from comparing the carbon content in trees of various ages. The primary photosynthetic productivity and the coefficient of proportionality between respiratory decarboxylation and the mass of the stem wood were calculated. A noticeable decrease in the net primary photosynthetic productivity was detected with a movement from South to North (from 62 to 64° N). However, the time for reaching the climax stage did not depend on the latitude and corresponding climatic parameters. Therefore, only the heterotrophic part of tree biomass determines annual carbon losses in a forest tree population. The conclusion is that the primary photosynthetic productivity, which limits the production process, determines the dependence of the volume of the northern-taiga carbon reservoir on the latitude and climatic parameters.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 17, 2004
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