Recent trends in climate change and future predictions of increasing carbon emissions and rising temperature have drawn a general focus towards the topic of carbon storage and the enlargement of carbon sinks. However, some forest ecosystems and tree species have not been investigated in terms of their biomass production and the closely linked carbon storage potential in much detail. Here, we investigate biomass production of Larix gmelinii (Rupr.) Kuzen, Pinus tabulaeformis Carr. and Quercus mongolica Fisch. ex Ledeb. in the temperate zone of China by analyzing gravimetric wood density as a proxy. As gravimetric wood density varies within a tree we use high-frequency densitometry on radial cuts of stem discs to analyze the inter-annual density variations at 1.3 m and 10 m stem height, respectively, by applying linear mixed-effects models and pairwise comparisons of estimated marginal means. Results show an overall lower gravimetric wood density for P. tabulaeformis compared to L. gmelinii and Q. mongolica. For all three tree species mean annual gravimetric density develops in a curvy-linear pattern and decreases to lower values than the initial values after leveling off at different cambial ages. Results will help to quantify stored carbon in the aboveground merchantable timber compartment of the investigated tree species and during different developmental stages of a tree.
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