Effects of Simulated Climate Warming and Grazing on Photosynthesis and Respiration of Permafrost Meadow Plant Community
文献类型：期刊论文
| 作者 | Li, Chengyi; Yang, Yuanwu; Li, Xilai; Chen, Qi; Zhou, Huakun
|
| 刊名 | RUSSIAN JOURNAL OF ECOLOGY
 |
| 出版日期 | 2020 |
| 卷号 | 51期号:3 |
| 关键词 | global warming grazing permafrost alpine meadow CO(2)flux net ecosystem exchange |
| 英文摘要 | The melting of permafrost and the degradation of alpine meadow ecosystems caused by climate warming and high-intensity human activities have imposed serious threats to local and global ecological security. In order to estimate the effects of climate warming and grazing interference on the photosynthesis and respiration of alpine meadow plant community in permafrost regions, warming - infrared radiator is applied to simulate the climate warming (increasing temperature by +2 degrees C). The winter grazing level is simulated by mowing the aboveground biomass of all plants. The responses of permafrost meadow community in terms of photosynthesis, respiration, surface soil temperature and moisture, as well as the carbon balance to simulated different climate warming and grazing level were analyzed and discussed. The results showed that: (1) the surface soil temperature in climate warming and grazing plots is significantly higher than in Ck plots (P< 0.01); (2) warming and warming + grazing plots enhanced community photosynthesis and respiration (P< 0.01); (3) warming and warming + grazing treatments increased community aboveground biomass (P< 0.05); (4) the photosynthetic rate increased in the second year, then decreased in the third year when both temperature and grazing level increased during the growing season. However, the ecosystem respiration increasingly increased year by year; (5) compared with the control groups, warming and grazing treatments resulted in an increase in carbon sequestration of the permafrost meadow community during the growing season. |
| 源URL | [http://210.75.249.4/handle/363003/60337]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Li, Chengyi,Yang, Yuanwu,Li, Xilai,et al. Effects of Simulated Climate Warming and Grazing on Photosynthesis and Respiration of Permafrost Meadow Plant Community[J]. RUSSIAN JOURNAL OF ECOLOGY,2020,51(3). |
| APA | Li, Chengyi,Yang, Yuanwu,Li, Xilai,Chen, Qi,&Zhou, Huakun.(2020).Effects of Simulated Climate Warming and Grazing on Photosynthesis and Respiration of Permafrost Meadow Plant Community.RUSSIAN JOURNAL OF ECOLOGY,51(3). |
| MLA | Li, Chengyi,et al."Effects of Simulated Climate Warming and Grazing on Photosynthesis and Respiration of Permafrost Meadow Plant Community".RUSSIAN JOURNAL OF ECOLOGY 51.3(2020). |
入库方式： OAI收割
来源：西北高原生物研究所
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