摘要
近年来,随着人类活动的增加和气候的多变,柴达木盆地植被受到了不同程度的影响。为研究人类活动和气候变化对柴达木盆地植被生产力的影响,本文基于2000—2017年的数据,利用Miami模型模拟了气候影响净初级生产力(NPP),然后通过下载Modis数据获得柴达木盆地实际NPP,并与气候影响NPP相结合,最后计算出人类活动对植被生产力的影响及其时空变化。结果发现,柴达木盆地整体的植被生产力增加了28.5 g/m^(2)/ya,盆地东部及南部地区增加较多;降水的增加促进了植被生产力的增加,但是存在东高西低的现象;人类活动在盆地东部促进了植被生产力的增加,而在西部减少了植被生产力。综上所述,人类活动和气候变化共同作用增加了盆地东部和南部地区的植被生产力,而降水增加较少和人类的破坏是盆地中部和西北部地区植被生产力增加不显著的原因。
In recent years,with the increase of human activities and the change of climate,the vegetation in the Qaidam Basin has been affected to varying degrees.To study the impact of human activities and climate change on vegetation productivity in Qaidam Basin,based on the data from 2000 to 2017,the Miami model was used to simulate the climate impact net primary productivity(NPP).Then the actual NPP of the Qaidam Basin was obtained by downloading MODIS data,and combined with the NPP of climate impact.Finally,the impact of human activities on vegetation productivity and its spatiotemporal changes were calculated.The results show that the overall vegetation productivity in the Qaidam Basin increased by 28.5 g/m^(2)/ya,with a greater increase in the eastern and southern parts of the basin.The increase in precipitation promoted vegetation productivity,but there is a phenomenon of higher productivity in the east and lower in the west.Human activities promoted the vegetation productivity in the east of the basin,while decreased in the west.To sum up,the joint action of human activities and climate change improved the vegetation productivity in the eastern and southern parts of the basin,while the less increase in precipitation and human destruction are the reasons for the insignificant increase in vegetation productivity in the central and northwestern parts of the basin.
作者
邹小玉
白蓉
孙武
郑凯
蔡其刚
ZOU Xiaoyu;BAI Rong;SUN Wu;ZHENG Kai;CAI Qigang(Academy of Animal and Veterinary Science,Qinghai University,Xining 810016,China;School of Life Science,Qinghai Normal University,Xining 810016,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China)
出处
《青海畜牧兽医杂志》
2024年第4期1-6,共6页
Chinese Qinghai Journal of Animal and Veterinary Sciences
基金
国家自然科学基金(32001188)
青海省科学技术厅项目(2021-ZJ-973Q)。
关键词
气候变化
人类活动
柴达木盆地
植被生产力
Climate change
Human activities
Qaidam Basin
Vegetation productivity
