Challenges in disentangling the influence of climatic and socio-economic factors on alpine grassland ecosystems in the source area of Asian major rivers

文献类型： 外文期刊

第一作者： Gao, Qing-zhu

作者： Gao, Qing-zhu;Ganjurjav;Li, Yue;Wan, Yun-fan;Zhang, Wei-na;Gao, Qing-zhu;Ganjurjav;Li, Yue;Wan, Yun-fan;Zhang, Wei-na;Borjigdai, Almaz;Borjigdai, Almaz;Borjigdai, Almaz

作者机构：

期刊名称：QUATERNARY INTERNATIONAL （ 影响因子：2.13； 五年影响因子：2.48 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Climate change and human activities affect ecosystems simultaneously. To distinguish their respective roles, we analyzed the relative impacts of climate change and human activities on alpine grasslands in Northern Tibet, which are the source area of Asian major rivers. The changes and their causes were determined using Normalized Difference Vegetation Index (NDVI) and climatic and socio-economic factors at different intensities of human activity within sampling plots (including depopulated land without human influences) from 1981 to 2006. Mann-Kendall test (MK) was used to test the trend of NDVI change and Pearson correlation analyses was utilized in multiple regressions between NDVI and the influencing factors. Abrupt changes of NDVI occurred at different times in plots that differed in human activity. Regional climate change has produced more negative than positive changes on alpine grasslands. The alpine grasslands significantly benefited under a moderate intensity of grazing activities. With the increased human activity, negative changes in NDVI were pervasive in Northern Tibet.

分类号： P5

  • 相关文献
作者其他论文 更多>>

微信小程序