Soil enzyme kinetics and thermodynamics in response to long-term vegetation succession
文献类型：期刊论文
| 作者 | Zhao ZiWen2,4; Wu Yang2,4; Chen WenJing2,4; Sun Wei2,4; Wang ZhanHui1; Liu GuoBin3,4; Xue Sha3,4 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-07-15 |
| 卷号 | 882页码:10 |
| 关键词 | Vegetation succession Enzyme kinetics Enzyme thermodynamics Carbon decomposition Nutrient cycling |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2023.163542 |
| 通讯作者 | Xue Sha(xuesha100@163.com) |
| 英文摘要 | Our current knowledge regarding soil organic matter (SOM) turnover during vegetation succession is often limited to conventional C decomposition models. However, microbial enzyme-mediated SOM degradation and nutrient cycling are mainly reflected in the kinetic parameters of these enzymes. Changes in the composition and structure of plant communities are typically accompanied by alterations in soil ecological functions. Therefore, it is important to clarify the kinetic parameters of soil enzymes and their temperature sensitivity in response to vegetation succession, especially under the current trend of climate change-related global warming; however, these are still understudied. Here, we examined the kinetic parameters of soil enzymes, their temperature sensitivity, and their associations with environmental variables over long-term (approximately 160 years) vegetation succession on the Loess Plateau using a space-for-time substitution method. We found that the kinetic parameters of soil enzymes changed significantly during vegetation succession. Specific response characteristics varied depending on the enzyme. Overall, the temperature sensitivity (Q10, 0.79-1.87) and activation energy (Ea, 8.69-41.49 kJ center dot mol-1) remained stable during long-term succession. Compared with N-acetyl-glucosaminidase and alkaline phosphatase, f3-glucosidase was more sensitive to extreme temperatures. In particular, two kinetic parameters (i.e., maximum reaction rate, Vmax; half-saturation constant, Km) of f3-glucosidase were decoupled at low (5 degrees C) and high (35 degrees C) temperatures. Overall, Vmax was the primary determinant of variations of enzyme catalytic efficiency (Kcat) during succession, and soil total nutrients had a greater impact on Kcat than available nutrients. Our results suggested that soil ecosystems played an increasingly important role as a C source during long-term vegetation succession, as indicated by the positive responses of the C cycling enzyme Kcat, while the factors related to soil N and P cycling remained relatively stable. |
| WOS关键词 | TEMPERATURE SENSITIVITY ; LOESS PLATEAU ; EXTRACELLULAR ENZYMES ; MICROBIAL COMMUNITIES ; PHOSPHATASE ; DIVERSITY ; DYNAMICS ; CLIMATE ; STOICHIOMETRY ; DECOMPOSITION |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001033750200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/195971]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xue Sha |
| 作者单位 | 1.Hebei Drinking Water Safety Monitoring Technol In, Chengde 067000, Peoples R China 2.Northwest A&F Univ, Coll Forestry, Yangling 712100, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China 4.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao ZiWen,Wu Yang,Chen WenJing,et al. Soil enzyme kinetics and thermodynamics in response to long-term vegetation succession[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,882:10. |
| APA | Zhao ZiWen.,Wu Yang.,Chen WenJing.,Sun Wei.,Wang ZhanHui.,...&Xue Sha.(2023).Soil enzyme kinetics and thermodynamics in response to long-term vegetation succession.SCIENCE OF THE TOTAL ENVIRONMENT,882,10. |
| MLA | Zhao ZiWen,et al."Soil enzyme kinetics and thermodynamics in response to long-term vegetation succession".SCIENCE OF THE TOTAL ENVIRONMENT 882(2023):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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