“三生空间”视角下广东地区植被净初级生产力时空格局及驱动力研究

Study on Spatial-Temporal Pattern and Driving Forces of Net Primary Production of Vegetation in Guangdong from the Perspective of “Production-Living-Ecological Space”

研究广东地区植被NPP时空演变和驱动机制,对广东地区生态文明建设具有重要意义。本研究基于“三生空间”视角,采用CASA模型估算2010~2020年广东地区植被NPP,分析其时空演变特征,利用地理探测器对其空间分异驱动力进行研究。结果表明:1) 广东地区以生态空间为主导,2010~2020年间“三生空间”面积变化明显,生态空间面积增加,生产空间和生活空间面积减少。2)“三生空间”植被NPP均呈先增后减趋势,但总体植被NPP均有所增加。其中,生态空间植被NPP值最高,为992.91 gC∙m−2∙a−1,其次为生产空间,为771.96 gC∙m−2∙a−1;生活空间植被NPP值最低,为518.82 gC∙m−2∙a−1。3) NDVI是对植被NPP空间分异影响最大的因子,其次为土地利用因子,生态空间和生产空间气温、降水和太阳辐射因子对植被NPP空间分异的影响相当,在生活区的影响差异则比较明显。

It is important to study the spatial and temporal evolution of vegetal NPP and its driving mechanism for the construction of ecological civilization in Guangdong. Based on the perspective of “Production-Living-Ecological Space”, this study uses the CASA model to estimate the vegetal NPP in Guangdong from 2010 to 2020, analyzes its spatial and temporal evolution characteristics, and investigates its spatial differentiation driving force by using geographic probes. The results show that: 1) The ecological space is the dominant area in Guangdong, and the area of the “Production-Living-Ecological Space” changes significantly between 2010 and 2020, with the area of ecological space increasing and the area of production space and living space decreasing. 2) The vegetal NPP in the “Production-Living-Ecological Space” tends to increase first and then decrease, but the overall vegetal NPP increases. The highest NPP value was 992.91 gC∙m−2∙a−1 in ecological space, followed by 771.96 gC∙m−2∙a−1 in production space, and the lowest NPP value was 518.82 gC∙m−2∙a−1 in living space. 3) NDVI was the most influential factor on the spatial variation of vegetal NPP, followed by land use factor. The effects of temperature, precipitation and solar radiation on the spatial variation of vegetal NPP were comparable in ecological space and production space, and the differences were more obvious in living areas.