Mo Wenbo, Zhao Yunlin, Yang Nan, Xu Zhenggang
Key Laboratory of Forestry Remote Sensing Based Big Data & Ecological Security for Hunan Province, Central South University of Forestry and Technology, Changsha, 410004, China.
Laboratory of Key Technologies of Digital Urban-Rural Spatial Planning of Hunan Province, College of Architecture & Urban Planning, Hunan City University, Yiyang, 413000, China.
Environ Sci Pollut Res Int. 2023 Mar;30(14):40388-40404. doi: 10.1007/s11356-022-24782-z. Epub 2023 Jan 7.
Although the research framework of ecological function zoning is complex and diverse, there are not many spatially continuous zoning results, which can be effectively applied to watershed management practices. Ecosystem service bundles and trade-offs can identify interactions among multiple ecosystem services, and achieve better social-ecosystem management when applying to ecological function zoning. Taking the Dongjiang Lake Basin, China, as research area, the study used the InVEST model to investigate the trade-offs and synergies of ecosystem services at township and grid scales, respectively. Then, the study conducted ecological function zoning based on the bundles and trade-off intensity among ecosystem services. The results showed that food production showed extremely significant trade-offs with other services in the two scales, in which the trade-off intensity between food production and water purification was the largest, and the water areas were the hotspots of trade-off intensity. Based on the ecosystem service bundles at the township, combined with the trade-off intensity, the watershed was finally divided into four ecological functional zones, namely, agricultural product supply area (southern part in the study area), economic forestry area (northeast regions in the study area), water supply area (western areas of the study area), and forest conservation area (northern areas in the study area), accounting for 29.27%, 14.63%, 17.07%, and 39.03%, respectively. The study contributed to the ecological function maintenance and sustainable development in Dongjiang Lake Basin and provided an important reference in ecological zoning.
尽管生态功能分区的研究框架复杂多样，但空间连续的分区成果并不多，难以有效应用于流域管理实践。生态系统服务束及权衡关系能够识别多种生态系统服务之间的相互作用，应用于生态功能分区时可实现更好的社会-生态系统管理。以中国东江湖流域为研究区域，该研究分别利用InVEST模型在乡镇和网格尺度上探究了生态系统服务的权衡与协同关系。然后，基于生态系统服务束及其权衡强度进行了生态功能分区。结果表明，粮食生产在两个尺度上与其他服务均呈现出极显著的权衡关系，其中粮食生产与水质净化之间的权衡强度最大，水域是权衡强度的热点区域。基于乡镇尺度的生态系统服务束，结合权衡强度，最终将流域划分为四个生态功能区，即农产品供应区（研究区域南部）、经济林区（研究区域东北部）、供水区（研究区域西部）和森林保护区（研究区域北部），分别占比29.27%、14.63%、17.07%和39.03%。该研究有助于东江湖流域的生态功能维护与可持续发展，并为生态分区提供了重要参考。
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