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The Use of carbon isotopes to identify the origin of soil-respired CO$$_{2}$$ in beech forest

Atarashi-Andoh, Mariko ; Koarashi, Jun  ; Ishizuka, Shigehiro*; Saito, Takeshi*; Hirai, Keizo*

Soil organic matter (SOM) is the major reservoir of carbon in terrestrial ecosystems. Thus, to evaluate the CO$$_{2}$$ flux from SOM is an important step toward estimating the effect of environmental change on the terrestrial carbon cycles. In this study, we estimated the contribution of different soil CO$$_{2}$$ sources (SOM, litter and root) to CO$$_{2}$$ flux from the forest floor based on measures of carbon isotopic ratios in SOM, litter, soil-respired CO$$_{2}$$ and atmospheric CO$$_{2}$$ in a cool-temperate deciduous forest.



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