Interactions between root and shoot competition among four plant species in an alpine meadow on the Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Song M. H. ; Tian Y. Q. ; Xu X. L. ; Hu Q. W. ; Hua O. Y. |
| 发表日期 | 2006 |
| 关键词 | alpine meadow competitive response root competition shoot competition below-ground competition positive interactions old-field productivity gradients facilitation communities responses allocation intensity grassland |
| 英文摘要 | At low altitudes, the interactions between root and shoot competition on plant growth have been extensively studied, and such interaction effects were found to be positive, negative, or neutral. However, little is known about such effects at high altitudes where the environmental conditions are harsher than those at low altitudes. We carried out a field experiment in an alpine meadow in the northeast Tibetan Plateau to test the hypothesis that a negative interaction between root and shoot competition exists for alpine plant species. Root and shoot competition were experimentally manipulated in the four grass species (Kobresia humilis, Saussurea superba, Stipa aliena and Elymus nutans). We found that K. humilis and S aliena grew better without competition, whereas S. superba grew better with shoot competition and E nutans grew better with root competition. The interactions between root and shoot competition were negative in K. humilis, positive in S superba, but neutral in S. aliena and E. nutans, suggesting that the interaction effects are species-specific. This study also suggested that alpine plants may trade off both plant-plant interactions and competition shift between root and shoot to adapt to stressful environments. (c) 2006 Elsevier SAS. All rights reserved. |
| 出处 | Acta Oecologica-International Journal of Ecology |
| 卷 | 29 |
| 期 | 2 |
| 页 | 214-220 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1146-609X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23066]  |
| 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.,Tian Y. Q.,Xu X. L.,et al. Interactions between root and shoot competition among four plant species in an alpine meadow on the Tibetan Plateau. 2006. |
入库方式： OAI收割
来源：地理科学与资源研究所
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