Spatio-temporal evolution of gross ecosystem product with high spatial resolution: A case study of Hunan Province during 2000—2020
-
摘要: 基于现有生态系统服务理论与方法,通过引入文教科研指标、优化气体调节指标,提出了湖南省本土自然资源生态系统生产总值(gross ecosystem product,GEP)核算指标体系,集成构建了GEP格网化评估模型,在30 m×30 m格网尺度评估分析了全省2000年、2010年和2020年GEP时空演化特征。研究结果表明: ①时间维度,近20 a间湖南省GEP上升3.34×105亿元,增幅达40.28%; 各生态系统类型对GEP贡献的排序为: 森林>农田>草地>湿地>城市。②空间维度,湖南省GEP总体呈现出西部和东南部高、中部和北部低的空间分布格局; 西部武陵山片区增长率高,北部洞庭湖区增长率低。③与已有10 km×10 km研究结果相比,本研究高空间分辨率GEP结果在水域及城市生态系统呈现的空间分布细节信息更多。④各单项生态系统功能价值量对湖南省GEP的贡献度排序随时间呈现规律性变化,土壤保持功能价值量的贡献对武陵山片区和洞庭湖区GEP变化占据主导作用。研究结果可为湖南省自然资源监管及生态环境保护提供科学决策依据。Abstract: By introducing cultural, educational, and scientific research indices and optimizing gas regulation indices, this study proposed an index system to assess the gross ecosystem product (GEP) of natural resources in Hunan Province based on the existing theories and methods for ecosystem service. This study then built a grid-based GEP model with a grid scale of 30 m × 30 m to analyze the spatio-temporal evolution of the GEP of Hunan in 2000, 2010, and 2020. The results are as follows: ① In the temporal dimension, the GEP of the province increased by 3.34×104 billion yuan over the past 20 years, with increased amplitude of 40.28%. The contribution of all ecosystems to the GEP was in the order of forest > farmland > grassland > wetland > city. ② In the spatial dimension, the GEP exhibited high values in western and southeastern regions and low values in central and northern regions. The GEP growth rate was higher in the Wulingshan area of western Hunan and lower in the Dongtinghu area of northern Hunan. ③ Compared with the existing research results on a grid scale of 10 km×10 km, the GEP results with a high spatial resolution showed more details of the spatial distribution of the aquatic and urban ecosystems. ④ The contribution degrees of ecosystem function values to the GEP of Hunan changed regularly over time. The contribution of the soil conservation function value dominated the changes in the GEP of the Wulingshan and Dongtinghu areas. The results of this study provide a basis for scientific decision-making in supervising natural resources and protecting the ecological environment in Hunan Province.
-
-
计量
- 文章访问数: 21
- PDF下载数: 3
- 施引文献: 0
下载: