Reduced compensatory effects explain the nitrogen-mediated reduction in stability of an alpine meadow on the Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Song M. H.; Yu, F. H. |
| 发表日期 | 2015 |
| 关键词 | compensatory effect dominance effect long-term experiment mean-variance scaling N fertilization nitrogen (N) chemical form richness temporal stability ecosystem stability species-diversity temporal variability insurance hypothesis grassland experiment biodiversity communities productivity mechanisms dynamics |
| 英文摘要 | Many ecosystems are facing strong perturbations such as nitrogen (N) fertilization, which can greatly alter ecosystem stability via different mechanisms. Understanding such mechanisms is critical for predicting how ecosystems will function in the face of global changes. We examined how 8yr of N fertilization with different N rates (no N addition or N addition at a low, medium or high rate) and different forms of N (ammonium, nitrate or ammonium nitrate) affected the temporal stability of the aboveground biomass of an alpine meadow on the Tibetan Plateau, and tested four mechanisms (diversity effect, mean-variance scaling, compensatory dynamics and dominance effect) that may alter stability. Compared with the control (no N addition), a high N rate did not affect the diversity effect, the mean-variance scaling or the dominance effect, but significantly decreased compensatory dynamics among species and functional groups, which contributed to the reduction in community stability of the alpine meadow. The form of N did not affect any of the four mechanisms and thus did not affect community stability. A high N rate can change community stability by altering compensatory dynamics, whereas the form of N may not have an effect. |
| 出处 | New Phytologist |
| 卷 | 207 |
| 期 | 1 |
| 页 | 70-77 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0028-646X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38851]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Song M. H.,Yu, F. H.. Reduced compensatory effects explain the nitrogen-mediated reduction in stability of an alpine meadow on the Tibetan Plateau. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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