Abstract
This study was conducted to test the hypothesis that wood tissues generated under elevated atmospheric [CO2] have lower quality and subsequent reduced decomposition rates. Chemical composition and subsequent field decomposition rates were studied for beech (Fagus sylvatica L.) twigs grown under ambient and elevated [CO2] in open top chambers. Elevated [CO2] significantly affected the chemical composition of beech twigs, which had 38% lower N and 12% lower lignin concentrations than twigs grown under ambient [CO2]. The strong decrease in N concentration resulted in a significant increase in the C/N and lignin/N ratios of the beech wood grown at elevated [CO2]. However, the elevated [CO2] treatment did not reduce the decomposition rates of twigs, neither were the dynamics of N and lignin in the decomposing beech wood affected by the [CO2] treatment, despite initial changes in N and lignin concentrations between the ambient and elevated [CO2] beech wood.
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Cotrufo, M.F., Ineson, P. Does elevated atmospheric CO2 concentrations affect wood decomposition?. Plant and Soil 224, 51–57 (2000). https://doi.org/10.1023/A:1004771426605
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DOI: https://doi.org/10.1023/A:1004771426605