成渝城市群生态系统服务价值与人类活动强度空间关系

科学揭示生态系统服务价值与人类活动强度的空间关系，对土地管理和城市规划具有重要意义。以成渝城市群为例，基于2000年、2010年、2018年三期土地利用数据，构建土地利用转移矩阵、生态系统服务价值评估模型及流向损益模型、人类活动强度指数评估模型，综合运用双变量空间自相关和多尺度地理加权回归方法，探究了成渝城市群地区人类活动强度与生态系统服务价值的空间关系，揭示人类活动强度对生态系统服务价值的深刻影响。结果显示：(1) 2000—2018年生态系统服务价值由5 064.6亿元下降到5 061.27亿元，建设用地过度侵占耕地已经成为了生态系统服务价值降低的主要原因；(2) 2000—2018年人类活动强度呈现出“双核圈层式”的空间特征，人类活动强度高值区主要集中于成都、重庆两地，边缘地区人类活动强度较弱；(3)人类活动强度增强会导致生态系统服务价值减少，二者存在显著空间负相关，中部地区恶化明显，2000—2018年总体而言负向效应加剧。研究表明退耕还林以及植被恢复对区域生态系统恢复而言至关重要，未来应更加重视区域生态保护，制定合理规划措施，共筑城市群绿色可持续发展一体化。

Spatial Relationship Between Human Activity Intensities and Ecosystem Services Value in Chengdu-Chongqing Urban Agglomeration

Scientifically revealing the spatial relationship between the ecosystem services value and the human activity intensity index is of great significance to land management and urban planning. Taking the Chengdu-Chongqing Urban Agglomeration an example, based on the three phases of land use data in 2000, 2010, and 2018, we constructed a land use transfer matrix, ecosystem service value evaluation model, flow profit and loss model, and human activity intensity index evaluation model, and comprehensively used the multi-scale geographically weighted regression(MGWR) model to explore the spatial relationship between the human activity intensity index and ecosystem services value in the Chengdu-Chongqing Urban Agglomeration area, and revealed the profound impact. The results show that:(1)the ecosystem services value dropped from 5.064 6×10¹¹ yuan to 5.061 27×10¹¹ yuan during 2000—2018; excessive occupation of cultivated land by construction land had become the main reason for the decrease in ecosystem service value;(2)during the years 2000—2018, the human activity intensity index showed the spatial characteristics of ‘dual-core circle'; The areas with strong human activity mainly concentrated in Chengdu and Chongqing, and the intensity of human activities in the marginal areas was weak;(3)the increased intensity of human activities would lead to decrease of ecosystem service value; there was a significant negative spatial correlation between the service value and the decline in the central region; the overall negative effect intensified from 2000 to 2018. Studies have shown that returning farmland to forests and vegetation restoration are critical to the restoration of regional ecosystems. In the future, more attention should be paid to regional ecological protection, reasonable planning measures should be formulated, and the integration of green and sustainable development of urban agglomerations should be built together.