Urbanization weakens soil carbon stocks but enhances carbon stability through coupled physicochemical and microbial mechanisms in Beijing urban-rural forests
文献类型：期刊论文
| 作者 | Liu, Dan1; Liu, Yuejia1; Wang, Chunmei1; Song, Minghua2; Dou, Xiaomin1; Liu, Xiaoqing1 |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 286页码:122901 |
| 关键词 | Urban-rural gradient forest Soil organic carbon Soil aggregate Enzyme activity Microbial community composition Carbon degradation genes |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2025.122901 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Urban forest soils are important carbon (C) pools, and their C transformation processes are influenced by environmental changes driven by rapid urbanization. However, the mechanisms underlying soil organic C (SOC) storage and stability remain unclear. In this study, we investigated forest soils along an urban-rural gradient in Beijing from the physical (soil aggregates), chemical (13C NMR), and microbial (metagenomic sequencing) perspectives to elucidate SOC stabilization mechanisms. We found SOC content in urban soils was 20.97 % lower than in suburban forests and 31.21 % in rural forests, primarily due to reduced litter input and altered C turnover. The proportion of SOC within the silt-clay fraction was increased by 23.76 %, indicating greater physical protection. The relative abundance of aromatic C and alkyl C were increased by 2.27 % and 2.34 %, respectively, suggesting enhanced chemical recalcitrance. Microbial analysis showed a 36.48 % reduction in ectomycorrhizal fungi, a 36.28 % decline in oxidative enzyme activities, and a 47.36 % decrease in genes related to recalcitrant degradation, while genes and enzymes targeting labile C were enriched. These shifts constrained decomposition of recalcitrant compounds, reinforcing SOC persistence. Overall, urbanization reduces SOC storage but enhances SOC stability due to promoting fine-fraction association, chemical recalcitrance, and optimizing microbial community composition. These findings provide new insights into urban soil C sequestration and feedbacks to climate change. |
| URL标识 | 查看原文 |
| WOS关键词 | ORGANIC-CARBON ; LAND-USE ; SEQUESTRATION ; STABILIZATION ; DECOMPOSITION ; COMMUNITIES ; GRADIENTS ; MATTER ; POOLS ; NORTH |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| WOS记录号 | WOS:001580740300007 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/217546]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Chunmei; Song, Minghua |
| 作者单位 | 1.Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, A11,Datun Rd, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Dan,Liu, Yuejia,Wang, Chunmei,et al. Urbanization weakens soil carbon stocks but enhances carbon stability through coupled physicochemical and microbial mechanisms in Beijing urban-rural forests[J]. ENVIRONMENTAL RESEARCH,2025,286:122901. |
| APA | Liu, Dan,Liu, Yuejia,Wang, Chunmei,Song, Minghua,Dou, Xiaomin,&Liu, Xiaoqing.(2025).Urbanization weakens soil carbon stocks but enhances carbon stability through coupled physicochemical and microbial mechanisms in Beijing urban-rural forests.ENVIRONMENTAL RESEARCH,286,122901. |
| MLA | Liu, Dan,et al."Urbanization weakens soil carbon stocks but enhances carbon stability through coupled physicochemical and microbial mechanisms in Beijing urban-rural forests".ENVIRONMENTAL RESEARCH 286(2025):122901. |
入库方式： OAI收割
来源：地理科学与资源研究所
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