Comparison of the seasonal and successional variation of asymbiotic and symbiotic nitrogen fixation along a glacial retreat chronosequence
文献类型：期刊论文
| 作者 | Zhang, Jun; DeLuca, Thomas H.; Chenpeng, Zhenni; Li, Andi; Wang, Genxu; Sun, Shouqin |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-10-20 |
| 卷号 | 896页码:165163 |
| ISSN号 | 0048-9697 |
| 关键词 | Acetylene reduction activity Nodulating and non-nodulating plants Primary succession Tibetan Plateau |
| DOI | 10.1016/j.scitotenv.2023.165163 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Climate change is resulting in accelerated retreat of glaciers worldwide and much nitrogen-poor debris is left after glacier retreats. Asymbiotic dinitrogen (N2) fixation (ANF) can be considered a 'hidden' source of nitrogen (N) for nonnodulating plants in N limited environments; however, seasonal variation and its relative importance in ecosystem N budgets, especially when compared with nodulating symbiotic N2-fixation (SNF), is not well-understood. In this study, seasonal and successional variations in nodulating SNF and non-nodulating ANF rates (nitrogenase activity) were compared along a glacial retreat chronosequence on the eastern edge of the Tibetan Plateau. Key factors regulating the N2-fixation rates as well as the contribution of ANF and SNF to ecosystem N budget were also examined. Significantly greater nitrogenase activity was observed in nodulating species (0.4-17,820.8 & mu;mol C2H4 g-1 d-1) compared to non-nodulating species (0.0-9.9 & mu;mol C2H4 g-1 d-1) and both peaked in June or July. Seasonal variation in acetylene reduction activity (ARA) rate in plant nodules (nodulating species) and roots (non-nodulating species) was correlated with soil temperature and moisture while ARA in non-nodulating leaves and twigs was correlated with air temperature and humidity. Stand age was not found to be a significant determinant of ARA rates in nodulating or nonnodulating plants. ANF and SNF contributed 0.3-51.5 % and 10.1-77.8 %, respectively, of total ecosystem N input in the successional chronosequence. In this instance, ANF exhibited an increasing trend with successional age while SNF increased only at stages younger than 29 yr and then decreased as succession proceeded. These findings help improve our understanding of ANF activity in non-nodulating plants and N budgets in post glacial primary succession. |
| WOS关键词 | DINITROGEN FIXATION ; N-2 FIXATION ; PLEUROZIUM-SCHREBERI ; AMINO-ACIDS ; FOREST ; TREES ; DIVERSITY ; GRASSLAND ; PATTERNS ; POOLS |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001037730000001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/194567]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Oregon State University 2.Institute of Geographic Sciences & Natural Resources Research, CAS 3.Chinese Academy of Sciences 4.Sichuan University 5.South China Botanical Garden, CAS |
| 推荐引用方式 GB/T 7714 | Zhang, Jun,DeLuca, Thomas H.,Chenpeng, Zhenni,et al. Comparison of the seasonal and successional variation of asymbiotic and symbiotic nitrogen fixation along a glacial retreat chronosequence[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,896:165163. |
| APA | Zhang, Jun,DeLuca, Thomas H.,Chenpeng, Zhenni,Li, Andi,Wang, Genxu,&Sun, Shouqin.(2023).Comparison of the seasonal and successional variation of asymbiotic and symbiotic nitrogen fixation along a glacial retreat chronosequence.SCIENCE OF THE TOTAL ENVIRONMENT,896,165163. |
| MLA | Zhang, Jun,et al."Comparison of the seasonal and successional variation of asymbiotic and symbiotic nitrogen fixation along a glacial retreat chronosequence".SCIENCE OF THE TOTAL ENVIRONMENT 896(2023):165163. |
入库方式： OAI收割
来源：地理科学与资源研究所
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