Effects of stand age on carbon storage in dragon spruce forest ecosystems in the upper reaches of the Bailongjiang River basin, China

Scientific Reports
Jianjun CaoCunlin Xin

Abstract

At an ecosystem level, stand age has a significant influence on carbon storage (CS). Dragon spruce (Picea asperata Mast.) situated along the upper reaches of the Bailongjiang River in northwest China were categorized into three age classes (29-32 years, Y1; 34-39 years, Y2; 40-46 years, Y3), and age-related differences in total carbon storage (TCS) of the forest ecosystem were investigated for the first time. Results showed that TCS for the Y1, Y2, and the Y3 age groups were 323.64, 240.66 and 174.60 Mg ha-1, respectively. The average TCS of the three age groups was 255.65 Mg C ha-1, with above-ground biomass, below-ground biomass, litter, and soil in the top 0.6 m contributing 15.0%, 3.7%, 12.1%, and 69.2%, respectively. CS in soil and TCS of the Y1 age group both significantly exceeded those of the Y3 age group (P < 0.05). Contrary to other recent findings, the present study supports the hypothesis that TCS is likely to decrease as stand age increases. This indicates that natural resource managers should rejuvenate forests by routinely thinning older stands, thereby not only achieving vegetation restoration, but also allowing these stands to create a long-term carbon sink for this important eco-region.

References

Jul 21, 2007·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Zhuo Chen, Xiaofeng Kong
Sep 23, 2016·The Science of the Total Environment·Mathieu JonardQuentin Ponette
Mar 30, 2017·Journal of Environmental Management·Shambhu Prasad DangalShyam Krishna Paudel
Mar 24, 2018·Global Change Biology·Andreas KrauseAlmut Arneth
Apr 17, 2018·Ecological Applications : a Publication of the Ecological Society of America·Gauthier LigotAdeline Fayolle
Apr 19, 2018·Proceedings of the National Academy of Sciences of the United States of America·Xuli TangGuoyi Zhou

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