欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2021, Vol. 40 ›› Issue (12): 3836-3848.doi: 10.13292/j.1000-4890.202111.033

• 研究报告 • 上一篇    下一篇

基于地理探测器的云南省净初级生产力时空演变及因子探测

孙治娟1,谢世友1,2*   

  1. 1西南大学地理科学学院, 重庆 400715;2西南大学三峡库区生态环境教育部重点实验室, 重庆 400715)
  • 出版日期:2021-12-10 发布日期:2022-05-10

Spatiotemporal variation in net primary productivity and factor detection in Yunnan Province based on geodetector.

SUN Zhi-juan1, XIE Shi-you1,2*   

  1. (1School of Geography, Southwest University, Chongqing 400715, China; 2Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Southwest University, Chongqing 400715, China).
  • Online:2021-12-10 Published:2022-05-10

摘要: 为探明云南省植被净初级生产力(NPP)时空演变特征及其驱动因子,基于2000—2015年NPP数据和相应时间序列的气象、DEM、土地利用、NDVI、人口密度数据,采用趋势分析法、相关分析法及地理探测器方法,对2000—2015年云南省植被NPP的时空变化及其驱动因子进行了定量研究。结果表明:云南省植被NPP年际变化总体呈波动增加趋势,年均增加速率为2.13 g C·m-2·a-1;植被NPP年均值空间差异性较大,总体上从东北向西南递增,2000—2015年88.5%的地区NPP保持不变或呈增加趋势;单因子影响力上,以2010年为界,NPP的主导因子由植被覆盖度因子转变为降水因子,而人为干扰因素的影响力在上升;就双因子交互作用而言,两因子的交互作用更能增强对云南省NPP空间分异的解释力,因此在未来生态环境规划中应重视多因子对植被NPP的协同作用,进而深入认识云南省生态系统健康状况。

关键词: 地理探测器, NPP, 时空变化, MODIS, 主导因子

Abstract: We examined the spatiotemporal variation and driving factors of net primary productivity (NPP) in Yunnan Province, using trend analysis, correlation analysis, and geodetector method based on NPP data from 2000 to 2015, as well as meteorological, DEM, land use, NDVI and population density data. The interannual variation of NPP in Yunnan Province showed a fluctuating increasing trend with a mean annual growth rate of 2.13 g C·m-2·a-1. The average annual NPP had large spatial variations, and generally increased from the northeast to southwest. The NPP in 88.5% of the total areas remained basically unchanged or increased from 2000 to 2015. In terms of each individual factor, the dominant factor for NPP changed from vegetation coverage to precipitation in 2010 and the influence of human interference increased. In terms of two-factor interaction, the interaction of two factors enhanced the explanatory power of spatial differentiation of NPP in Yunnan Province. Therefore, the synergistic effects of multiple factors on NPP should be emphasized in future ecological environment planning to understand the status of ecosystem health in Yunnan Province.

Key words: geodetector, net primary productivity, spatiotemporal variation, MODIS, dominant factor.