| 引用本文: | 崔梦阳,曹艳萍,王少坤,等.黄河流域河南段陆地生态系统总初级生产力
时空格局及影响因素研究[J].灌溉排水学报,2025,44(7):89-96. |
| CUI Mengyang,CAO Yanping,WANG Shaokun,et al.黄河流域河南段陆地生态系统总初级生产力
时空格局及影响因素研究[J].灌溉排水学报,2025,44(7):89-96. |
|
| 摘要: |
| 【目的】分析黄河流域河南段陆地生态系统总初级生产力（GPP）时空格局及其影响因素。【方法】以黄河流域河南段为研究区，使用Theil-Sen Median趋势分析研究GPP变化趋势，基于Mann-Kendall检验趋势的显著性，通过地理探测器模型探测气候、地形、人文因子对GPP年变化率空间分布格局的影响。【结果】2001—2022年，黄河流域河南段生态系统GPP呈波动上升趋势；空间分布格局差异明显，呈低值零星散落、高值聚集连片的空间格局，研究区西南部GPP高，中部和北部GPP低。年GPP呈上升趋势的面积占区域总面积的89.23%，主要分布在三门峡、洛阳、济源、新乡地区。耕地、草地、林地面积逐渐减少，年GPP逐渐增加。【结论】坡向、高程、人口数量、耕地面积为黄河流域河南段生态系统GPP年变化率空间异质性的主要影响因子，在气温稳定、降水量增多、地形平缓的区域，陆地生态系统GPP年增长率较高。 |
| 关键词: 总初级生产力；地理探测器；气候变化；人文因子；黄河流域河南段 |
| DOI：10.13522/j.cnki.ggps.2024194 |
| 分类号: |
| 基金项目: |
|
| Spatiotemporal patterns and driving factors of terrestrial ecosystem gross primary productivity in the Henan Section of the Yellow River Basin |
|
CUI Mengyang, CAO Yanping, WANG Shaokun, YANG Kang
|
|
1. Faculty of Geographical Science and Engineering, Henan University, Zhengzhou 450046, China; 2. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng 475004, China
|
| Abstract: |
| 【Objective】This study investigates the spatiotemporal dynamics of gross primary productivity (GPP) in the Henan Section of the Yellow River Basin, identify its extent and driving factors, and to provide a scientific basis for ecosystem conservation and management.【Method】We used Theil-Sen median trend analysis and the Mann-Kendall test to assess long-term GPP trends from 2001 to 2022. The GeoDetector model was used to evaluate the influence of climatic, topographic, and anthropogenic factors on spatial variation in GPP.【Result】From 2001 to 2022, the overall GPP in the region showed a fluctuating yet upward trend. Spatially, GPP distribution was highly heterogeneous, with clusters of high values primarily in the Southwest and lower values in central and Northern areas. Regions with increasing GPP accounted for 89.23% of the total area, concentrated in Sanmenxia, Luoyang, Jiyuan, and Xinxiang. Although the total area of cropland, grassland, and forestland declined during this period, their respective annual GPP levels increased. Slope aspect, elevation, and population size emerged as the primary factors influencing spatial variation in GPP. Interaction analysis indicated that the combined effects of slope gradient and elevation had the strongest influence on GPP. Furthermore, ecological factor analysis highlighted slope aspect, elevation, population density, and cropland area as significant contributors to GPP variation. Risk assessment revealed that areas with stable temperature, increased precipitation, and gentle terrain supported higher GPP growth.【Conclusion】The Henan Section of the Yellow River Basin has seen GPP improvement in the past two decades, despite reductions in vegetated land area. Topographic and climatic factors, especially elevation and slope-related variables, play the dominant role in shaping GPP patterns, while anthropogenic factors have a moderate influence. These findings underscore the need to consider terrain and climate stability in regional ecological management and suggest that targeted conservation in high-growth areas may further enhance ecosystem productivity. |
| Key words: gross primary productivity; geodetector; climate change; human activity; Henan Section of the Yellow River Basin |
