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Moso bamboo expansion into a broadleaved forest alters the dominant soil organic carbon source |
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| Authors: | Shuai Shao Hongbo He Chenfei Liang Junhui Chen Hua Qin Shanshan Wang Zhongqian Wang Yi Li Weina Jia Xuli Zheng Yong Chen Jeffry J Fuhrmann Qiufang Xu Xudong Zhang |
| Institution: | 1. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China;2. Chinese Academy of Sciences, Institute of Applied Ecology, Shenyang, China;3. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China
Zhejiang Provincial Collaborative Innovation Center for High-Efficiency Utilization of Bamboo, Resources, Zhejiang A&F University, Lin'an, Hangzhou, China Contribution: Resources (equal);4. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China Zhejiang Provincial Collaborative Innovation Center for High-Efficiency Utilization of Bamboo, Resources, Zhejiang A&F University, Lin'an, Hangzhou, China Contribution: Funding acquisition (equal), Resources (equal);5. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China Contribution: Data curation (equal);6. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, China Contribution: ?Investigation (equal);7. Chinese Academy of Sciences, Institute of Applied Ecology, Shenyang, China University of Chinese Academy of Sciences, Beijing, China Contribution: Methodology (equal);8. Lingfengsi Forest Farm of Anji County, Anji, China Contribution: ?Investigation (equal);9. Department of Plant and Soil Sciences, University of Delaware, Newark, USA Contribution: Writing - review & editing (equal);10. Chinese Academy of Sciences, Institute of Applied Ecology, Shenyang, China Contribution: Conceptualization (equal), Methodology (equal), Project administration (equal), Supervision (equal) |
| Abstract: | Both microbes and plants contribute to soil organic carbon (SOC) formation and retention, but their roles in controlling SOC dynamics in forest soils under Moso bamboo (Phyllostachys edulis) expansion remain unclear. Here, amino sugars and lignin monomers were measured to represent microbial necromass and plant-derived components, respectively. The observed decline in both amino sugars and lignin monomers during Moso bamboo expansion indicates a reduction in microbial necromass and recalcitrant plant contributions to SOC composition. This could be attributed to a limitation of microbial substrates and proliferation caused by the reduced litter inputs resulting from the expansion. The proportion of microbial necromass contributing to the SOC pool increased, but that of lignin monomers decreased, as SOC content decreased with Moso bamboo expansion. This suggests that the decrease of SOC during bamboo expansion was mainly due to the reduction of lignin, while the increased contribution of microbial-derived carbon to SOC may serve to improve SOC stability. Our study sheds light on the altered SOC source inputs resulting from Moso bamboo expansion and emphasizes the need for sustainable forestry management practices that differentiate between microbial- and plant-derived carbon pools. |
| Keywords: | amino sugars microbial necromass lignin moso bamboo expansion SOC retention |