Photosynthesis Limits Carbon Sequestering in the Taiga Zone of Northeastern Europe

Photosynthesis Limits Carbon Sequestering in the Taiga Zone of Northeastern Europe 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Photosynthesis Limits Carbon Sequestering in the Taiga Zone of Northeastern Europe

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1021952921687
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 17, 2004

References

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