Temperature and microbial metabolic limitations govern microbial carbon use efficiency in the Tibetan alpine grassland
文献类型：期刊论文
| 作者 | He Xuejun3,4; Liu Fangbin2; Ma Tian3 ; Ma Ase3; Wang Yaoyao3; Li Yifan3; Gao Wenjing3; Yang Zhiying3; Ke Junsheng1; Xiao Yao1
|
| 刊名 | Applied Soil Ecology
 |
| 出版日期 | 2025-01 |
| 卷号 | 206页码:1-9 |
| ISSN号 | 0929-1393 |
| DOI | 10.1016/j.apsoil.2025.105880 |
| 英文摘要 | Microbial carbon use efficiency (CUE), the ratio of microbial growth to carbon (C) uptake, is a pivotal parameter for estimating the transformation of soil C into microbial biomass C. This process is significantly influenced by environmental conditions and microbial metabolic traits. However, there are significant gaps in understanding the variations and driving factors of microbial CUE in alpine grasslands due to the lack of large-scale empirical evaluations. To fill these gaps, we collected surface soils along a large-scale environmental gradient in the Tibetan alpine grassland. We analyzed soil extracellular enzyme activities and edaphic biogeochemical properties. Additionally, we evaluated microbial metabolic status based on extracellular enzyme stoichiometry and calculated microbial CUE using a stoichiometric model. The findings indicate that as altitude increased, microbes shifted from nitrogen to phosphorus limitation, and the relative C limitation diminished. There was a significant positive correlation between microbial CUE and altitude, with values of 0.25 ± 0.02 (mean ± standard error) at low elevation and 0.45 ± 0.02 at high elevation. Partial least squares path modeling revealed that mean annual temperature (MAT) and microbial metabolic limitations were the primary drivers of microbial CUE. Specifically, microbial CUE decreased with increasing MAT and aggravated microbial limitations of C, nitrogen, or phosphorus. Overall, this study provides an empirical investigation for microbial CUE in alpine grassland ecosystem. Our results suggest that microbial CUE should not be represented as constant value in Earth system model. Comprehending the driving mechanism underlying microbial CUE is crucial for accurately modeling soil C cycling in the context of global change. |
| 语种 | 英语 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/40089]  |
| 专题 | 个人在本单位外知识产出 |
| 通讯作者 | Ma Tian; Liu Xiang |
| 作者单位 | 1.State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China 2.School of Geography and Tourism, Qilu Normal University, Ji'nan 250200, China 3.State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China 4.Key Laboratory of Western Chinese Environmental System, Ministry of Education, College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China 5.College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China |
| 推荐引用方式 GB/T 7714 | He Xuejun,Liu Fangbin,Ma Tian,et al. Temperature and microbial metabolic limitations govern microbial carbon use efficiency in the Tibetan alpine grassland[J]. Applied Soil Ecology,2025,206:1-9. |
| APA | He Xuejun.,Liu Fangbin.,Ma Tian.,Ma Ase.,Wang Yaoyao.,...&Liu Xiang.(2025).Temperature and microbial metabolic limitations govern microbial carbon use efficiency in the Tibetan alpine grassland.Applied Soil Ecology,206,1-9. |
| MLA | He Xuejun,et al."Temperature and microbial metabolic limitations govern microbial carbon use efficiency in the Tibetan alpine grassland".Applied Soil Ecology 206(2025):1-9. |
入库方式： OAI收割
来源：烟台海岸带研究所
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