Carbon stock growth in a forest stand: the power of age

Georgii A Alexandrov¹^,2

¹Office for Global Environmental Database, Center for Global Environmental Research, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan

²Laboratory of Mathematical Ecology, Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevsky Per. 3, Moscow, 109017, Russia

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Carbon Balance and Management 2007, 2:4doi:10.1186/1750-0680-2-4


Published:	26 April 2007

Abstract

Background

Understanding the relationship between the age of a forest stand and its biomass is essential for managing the forest component of the global carbon cycle. Since biomass increases with stand age, postponing harvesting to the age of biological maturity may result in the formation of a large carbon sink. This article quantifies the carbon sequestration capacity of forests by suggesting a default rule to link carbon stock and stand age.

Results

The age dependence of forest biomass is shown to be a power-law monomial where the power of age is theoretically estimated to be 4/5. This theoretical estimate is close to the known empirical estimate; therefore, it provides a scientific basis for a quick and transparent assessment of the benefits of postponing the harvest, suggesting that the annual magnitude of the sink induced by delayed harvest lies in the range of 1–2% of the baseline carbon stock.

Conclusion

The results of this study imply that forest age could be used as an easily understood and scientifically sound measure of the progress in complying with national targets on the protection and enhancement of forest carbon sinks.