The Influences of Climate Change and Human Activities on Vegetation Dynamics in the Qinghai-Tibet Plateau
文献类型：SCI/SSCI论文
| 作者 | Huang K.; Zhang, Y. J.; Zhu, J. T.; Liu, Y. J.; Zu, J. X.; Zhang, J. |
| 发表日期 | 2016 |
| 关键词 | grassland climate change grazing contribution multiple standardize regression net primary productivity atmospheric heat-source ndvi time-series alpine grassland northern-tibet trend analysis land degradation weakening trend cover changes china |
| 英文摘要 | Grasslands occupy nearly three quarters of the land surface of the Qinghai-Tibet plateau ( QTP) and play a critical role in regulating the ecological functions of the QTP. Ongoing climate change and human interference have greatly affected grasslands on the QTP. Differentiating human-induced and climate-driven vegetation changes is vital for both ecological understanding and the management of husbandry. In this study, we employed statistical analysis of annual records, various sources of remote sensing data, and an ecosystem process model to calculate the relative contribution of climate and human activities to vegetation vigor on the QTP. The temperature, precipitation and the intensity and spatial pattern of livestock grazing differed between the periods prior to and after the year 2000, which led to different vegetation dynamics. Overall, increased temperature and enhanced precipitation favored vegetation growth. However, their combined effects exhibited strong spatial heterogeneity. Specifically, increased temperature restrained vegetation growth in dry steppe regions during a period of slightly increasing precipitation from 1986 to 2000 and in meadow regions during a period of precipitation decline during 2000-2011, thereby making precipitation a dominant factor. An increase in precipitation tended to enhance vegetation growth in wet meadow regions during warm periods, and temperature was the limiting factor in Tibet during dry periods. The dominant role played by climate and human activities differed with location and targeted time period. Areas dominated by human activities are much smaller than those dominated by climate. The effects of grazing on grassland pasture were more obvious under unfavorable climate conditions than under suitable ones. |
| 出处 | Remote Sensing |
| 卷 | 8 |
| 期 | 10 |
| 语种 | 英语 |
| ISSN号 | 2072-4292 |
| DOI标识 | 10.3390/rs8100876 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42998]  |
| 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 | Huang K.,Zhang, Y. J.,Zhu, J. T.,et al. The Influences of Climate Change and Human Activities on Vegetation Dynamics in the Qinghai-Tibet Plateau. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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