Coupling of soil carbon and nitrogen during the anthropogenic transition from desert grassland to shrubland
文献类型：期刊论文
| 作者 | Zhao, Yanan1,2,4; Li, Zhili1,2; Wang, Hongmei1,2,3,6; Zhang, Zhenjie1,2; Chen, Chen1,2; Li, Larry B.5 |
| 刊名 | CATENA
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 259页码:109349 |
| 关键词 | Desert steppe Anthropogenic shrub encroachment Woody plant invasion Vegetation transition Coupling Soil nitrogen mineralization |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2025.109349 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Shrub encroachment into grasslands is a global phenomenon with far - reaching implications for ecosystem carbon and nitrogen cycles. Yet, the impacts of anthropogenic shrub encroachment on soil carbon - nitrogen coupling remain largely unknown. Here, we examined a desert grassland - shrubland mosaic formed by nearly 40 years of anthropogenic shrub encroachment. We partitioned the mosaic into four transition sites and selected microhabitats for in - situ mineralization experiments. Our results indicated that transition sites and incubation time significantly influenced soil nitrogen and carbon parameters. As the ecosystem shifted from desert steppe to shrubland, there were notable decreases in inorganic nitrogen (-10.99 %), organic carbon (-97.33 %), and extracellular enzyme activity (-130.77 %), with concomitant reductions in net nitrogen mineralization (-102.47 %), organic carbon conversion rates (-157.14 %), and net nitrification rates (-249.14 %). Contrasting these patterns, soil respiration (+30.49 %) and ammonium nitrogen (+8.93 %) exhibited significant increases, while microbial biomass carbon remained statistically invariant across the vegetation shift. We also observed a shift from microbial mineralization to immobilization during the transition. Strong coupling was identified between carbon and nitrogen contents and conversion rates (p < 0.05). The net nitrification rate emerged as the key factor in carbon - nitrogen coupling due to the decoupling of ammonification and carbon transformation. Our work provides novel insights into the complex interplay of soil carbon and nitrogen under anthropogenic shrub encroachment. |
| URL标识 | 查看原文 |
| WOS关键词 | WOODY PLANT ENCROACHMENT ; ORGANIC-CARBON ; CO2 EFFLUX ; MINERALIZATION ; DYNAMICS ; RESPONSES ; FOREST ; CHEMISTRY ; POOLS ; DECOMPOSITION |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001545765700002 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215646]  |
| 专题 | 资源利用与环境修复重点实验室_外文论文 |
| 通讯作者 | Wang, Hongmei; Li, Larry B. |
| 作者单位 | 1.Ningxia Univ, Sch Forestry & Grassland Sci, Yinchuan 750021, Peoples R China; 2.Ningxia Univ, Key Lab Restorat & Reconstruct Degraded Ecosyst No, Minist Educ, Yinchuan 750021, Peoples R China; 3.Ningxia Grassland & Anim Husb Engn Technol Res Ctr, Yinchuan 750021, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 5.Univ Calif Riverside, Ecol Complex & Modeling Lab, Riverside, CA 92521 USA 6.Northern Yanchi Desert Steppe Observat & Res Stn N, Wuzhong 751100, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhao, Yanan,Li, Zhili,Wang, Hongmei,et al. Coupling of soil carbon and nitrogen during the anthropogenic transition from desert grassland to shrubland[J]. CATENA,2025,259:109349. |
| APA | Zhao, Yanan,Li, Zhili,Wang, Hongmei,Zhang, Zhenjie,Chen, Chen,&Li, Larry B..(2025).Coupling of soil carbon and nitrogen during the anthropogenic transition from desert grassland to shrubland.CATENA,259,109349. |
| MLA | Zhao, Yanan,et al."Coupling of soil carbon and nitrogen during the anthropogenic transition from desert grassland to shrubland".CATENA 259(2025):109349. |
入库方式： OAI收割
来源：地理科学与资源研究所
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