鲁东大学学报(自然科学版)

在推进长江大保护的背景下，探究长江经济带生态产品价值的时空动态演变特征，可为推动长江经济带高质量发展提供有益借鉴。本文基于2005—2020年长江经济带土地利用数据，采用修正后的当量因子表核算长江经济带130个地级市单元的生态产品价值，利用空间统计分析方法揭示长江经济带生态产品价值的时空特征，得出以下结论。1)长江经济带生态产品总值年际变化小，总值水平主要受地区土地面积和用地类型影响；单位面积生态产品价值保持在较为稳定水平，部分地级市变化率的类型有明显变化；市域生态产品价值的空间差异显著，长江上游与下游的生态产品总值差异大，长江南部与北部地区单位面积生态产品价值差异较明显。2)长江经济带单位面积生态产品价值的热点和冷点呈现集聚分布格局，热点区和次热点区分布较为广泛，冷点区和次冷点区数量呈先减后增的趋势；生态产品价值重心位于湖南省常德市，随时间推移“西高东低”的空间分布格局逐渐加强，标准差椭圆方位角变化较为稳定。3)长江经济带市域单位面积生态产品价值存在显著的空间正相关性，空间集聚类型以“高-高”和“低-低”为主，“高-高”集聚区主要分布在云南省中西部地区、湘黔交界地区、江西省北部及浙江省中西部地区，“低-低”集聚区集中分布于四川中东部和苏皖北部地区。

In the context of promoting the protection of the Yangtze River, the spatiotemporal dynamic evolution characteristics of the value of ecological products in the Yangtze River Economic Belt were explored, which can provide useful references for promoting high-quality development of the Yangtze River Economic Belt.Land use data of the Yangtze River Economic Belt from 2005 to 2020 were utilized as the basis, and a modified equivalent factor table is employed to calculate the ecological product value of 130 geographical units of prefecture-level city in the Yangtze River Economic Belt.Spatial statistical analysis methods were used to reveal the spatiotemporal characteristics of the ecological product value in the Yangtze River Economic Belt.The results are as follows.1) The interannual variation of the total value of ecological products in the Yangtze River Economic Belt is small, and the level of total value is mainly influenced by regional land area and land use type.The value of ecological products per unit area remains relatively stable, and there are significant changes in the types of change rates in some prefecture level cities.The spatial differences in the value of ecological products in urban areas are significant, with a large difference in the total value of ecological products between the upper and lower reaches of the Yangtze River, and a more pronounced difference in the value of ecological products per unit area between the southern and northern regions of the Yangtze River.2) The hotspots and cold spots of ecological product value per unit area in the Yangtze River Economic Belt show a clustered distribution pattern, with hotspots and sub hotspots widely distributed, and the number of cold spots and sub cold spots decreasing first and then increasing.The center of value of ecological products is located in Changde City, Hunan Province.The spatial distribution pattern of “high in the west and low in the east” has gradually strengthened, and the standard deviation ellipse azimuth has remained relatively stable.3) There is a significant spatial positive correlation in the ecological product value per unit area of the Yangtze River Economic Belt urban area, and the spatial agglomeration types are mainly “high-high” and “low-low”.The “high-high” agglomeration areas are mainly distributed in the central and western regions of Yunnan Province, the border area between Hunan and Guizhou, the northern part of Jiangxi Province, and the central and western parts of Zhejiang Province, while the “low-low” agglomeration areas are concentrated in the central and eastern parts of Sichuan Province and the northern parts of Jiangsu and Anhui provinces.