High biodegradability of dissolved organic carbon in the permafrost layer amplifies carbon emissions under warming
文献类型：期刊论文
| 作者 | Zhang, Zhenrui3; Tian, Liming1,4; Wang, Jinsong3; Zheng, Han2,3; Liu, Mengjie2,3; Niu, Shuli2,3 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 468页码:117782 |
| 关键词 | Soil dissolved organic carbon Thermal mineralization potential Molecular composition Bacteria Active and permafrost layers |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2026.117782 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Permafrost thaw induced by climate warming may trigger rapid carbon release, yet the thermal response of soil dissolved organic carbon (DOC) in the active and permafrost layers remains poorly understood. In this study, we investigated the thermal mineralization potential of DOC in soils from the active and permafrost layers at six representative sites on the Tibetan Plateau. Through laboratory incubations at 5 degrees C and 15 degrees C, combined with DOC molecular characterization and microbial analyses, we found that warming significantly increased CO2 emissions from permafrost-layer DOC far more than from active-layer DOC. This amplified response was largely attributed to the greater aliphaticity, lower oxidation state, and higher biodegradability of soil DOC in permafrost deposits. Our findings highlight that DOC in the permafrost-layer, which is often overlooked, constitutes a highly biodegradable and warming-sensitive carbon pool that could contribute disproportionately to CO2 emissions, thereby intensifying carbon-climate feedbacks in alpine permafrost ecosystems. |
| URL标识 | 查看原文 |
| WOS关键词 | MATTER ; ACIDS |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001722073700001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221280]  |
| 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, Jinsong |
| 作者单位 | 1.Chengdu Bot Garden, Chengdu 610083, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; 4.Sichuan Univ, Coll Life Sci, Key Lab Bioresource & Ecoenvironm Minist Educ Sich, Chengdu 610065, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Zhenrui,Tian, Liming,Wang, Jinsong,et al. High biodegradability of dissolved organic carbon in the permafrost layer amplifies carbon emissions under warming[J]. GEODERMA,2026,468:117782. |
| APA | Zhang, Zhenrui,Tian, Liming,Wang, Jinsong,Zheng, Han,Liu, Mengjie,&Niu, Shuli.(2026).High biodegradability of dissolved organic carbon in the permafrost layer amplifies carbon emissions under warming.GEODERMA,468,117782. |
| MLA | Zhang, Zhenrui,et al."High biodegradability of dissolved organic carbon in the permafrost layer amplifies carbon emissions under warming".GEODERMA 468(2026):117782. |
入库方式： OAI收割
来源：地理科学与资源研究所
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