| 建设用地扩张影响下南昌市生态系统服务变化及公平性识别 |
| 摘要点击 101 全文点击 6 投稿时间：2024-07-02 修订日期：2024-08-30 |
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| 中文关键词 建设用地扩张 生态系统服务 空间依赖性 生态公平测度 InVEST模型 |
| 英文关键词 construction land expansion ecosystem services spatial dependence ecological equity measurement InVEST model |
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| 中文摘要 |
| 建设用地扩张与生态系统服务变化及其相互作用是影响城镇发展和生态环境保护的主要因素. 综合运用空间计量模型，探究其空间交互作用，以及识别乡镇的生态公平和扩张效率水平，对促进城镇发展和生态环境保护的综合管控具有重要意义. 通过对南昌市2000年、2010年和2020年建设用地扩张的数量和模式进行量化，使用InVEST模型综合估算生态系统服务，然后运用空间计量模型对两者的相互关系进行回归分析，最后运用公平效率指数识别乡镇的生态公平和扩张效率情况. 结果表明：①2000~2020年南昌市建设用地扩张逐渐转变为以“飞地式”扩张为主要的扩张模式，中心城区以“填充式”扩张为主；同时综合生态系统服务呈现上升趋势，但中心城区生态系统服务下降明显. ②2000~2020年建设用地扩张和生态系统服务变化存在明显空间溢出效应；建设用地扩张对不同类型生态系统服务变化的影响不同，其扩张模式的转变对综合生态系统服务变化的影响强度加重. ③2000~2020年南昌市各乡镇生态公平和扩张效率的协调性明显提升，生态公平指数总差异从0.378 4降低到0.080 5；区域生态公平呈现优化趋势，但仍有部分地区更注重扩张发展效率，忽视生态环境的保护. 因此，研究结果认为城镇发展需坚持多因素和多维度的综合考虑，合理调整发展政策，并加大对建设用地扩张模式的管制力度，以期避免建设用地的盲目扩张导致的生态环境恶化. |
| 英文摘要 |
| The expansion of construction land and the changes in ecosystem services and their interactions are a major factors affecting urban development and ecological protection. Using spatial econometric models， this study explores the spatial interaction between the expansion of urban land for construction and ecosystem services and tests the existence of a correlation between the two. In this context， the study identifies and measures the levels of ecological equity and expansion efficiency for each township in the study area. This has significant implication on the comprehensive management and control of urban development and ecological protection in the study area. By quantifying the number and pattern of construction land expansion in Nanchang from 2000 to 2020， this study uses the InVEST model to comprehensively estimate water production， carbon storage， soil conservation， habitat quality， etc.， and ecosystem services. Furthermore， it uses the spatial lag model （SLM） and spatial error model （SEM） to conduct a regression analysis of the mutual relationship between the two. Finally， it uses the fair efficiency index to identify the ecological equity of towns and townships in the study area. The results showed that： ① The expansion of construction land in Nanchang from 2000 to 2020 has gradually shifted to a predominant expansion mode of “fly-in” expansion， while the central urban area has maintained a predominant expansion mode of “filling-in.” At the same time， the comprehensive ecosystem services in the entire region showed an upward trend， but the ecosystem services in the central urban area declined significantly. ② There was a clear spatial spillover effect of land use expansion and ecosystem service changes from 2000 to 2020. The change in ecosystem services of one area was not only significantly affected by the local land use expansion but also by the expansion of adjacent areas. The impact of land use expansion on the change of different types of ecosystem services was different， with a more significant impact on water production and habitat quality but a weaker or non-significant impact on carbon storage and soil conservation. The shift in the expansion pattern of cities increased the intensity of the impact of urban expansion on the comprehensive change of ecosystem services. ③ The coordination of ecological equity and expansion efficiency in each township of Nanchang improved significantly from 2000 to 2020. The total difference in ecological equity index has decreased from 0.378 4 to 0.080 5， and significant progress has been made in the development and protection of ecology in each township. The regional ecological equity showed an optimizing trend， but there are still some areas that pay more attention to the efficiency of expansion and ignore the protection of the ecological environment. Therefore， the research results suggest that urban development should adhere to a multi-factor， multi-dimensional comprehensive consideration； reasonably adjust development policies； and strengthen the regulatory efforts on the expansion mode of construction land to avoid the deterioration of the ecological environment caused by blind land expansion. |
