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| 县域生态网络构建与优化研究——以河北省曲周县为例 |
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武子豪1,2,张金懿1,2,帕茹克·吾斯曼江1,2,郝晋珉1,2*
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| (1.中国农业大学 土地科学与技术学院, 北京 100193;2. 自然资源部农用地质量与监控重点实验室, 北京 100193) |
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| 摘要: |
| 生态网络的构建能够减少快速城镇化带来的斑块破碎化问题，有助于增加网络连接度、提升区域生态稳定性。本研究选取河北省曲周县为研究对象，利用形态学空间格局分析方法(MSPA)和最小累计阻力模型(MCR)构建生态网络，通过重力模型划分生态廊道等级，对比优化前后的网络结构指数，定量考察优化效果。结果表明:1)曲周县生态源地共9块主要分布于中部县城周边和东北部林场，生态廊道整体分布不均，网络结构简单；2)优化措施主要包括新增生态源地3块，增补踏脚石5块，划分出7条重要廊道、15条建设廊道与8条规划廊道，同时构建水系廊道5条，并重点保护27个生态节点并修复12个生态间断点。优化后的曲周县生态网络的连通度与环通度得到较大提升；3)建设用地会影响生态廊道建设可行性，相互作用力高的生态廊道具有高建设可行性。最后，从网络结构与网络建设内外两方面优化曲周县生态结构，提出“两轴、三区、四廊、多点”的生态结构规矩布局。本研究可为提升曲周县生态保护效果乃至华北平原生态网络构建提供参考。 |
| 关键词: 生态网络 形态学空间格局分析 最小累积阻力模型 曲周县 |
| DOI：10.11841/j.issn.1007-4333.2022.07.20 |
| 投稿时间：2021-12-15 |
| 基金项目:国家科技支撑计划(2015BAD06B01) |
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| Construction and optimization of county ecological network: A case study of Quzhou County in Hebei Province |
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WU Zihao1,2,ZHANG Jinyi1,2,WUSIMANJIANG Paruke1,2,HAO Jinmin1,2*
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| (1.College of Land Science and Technology, China Agricultural University, Beijing 100193, China;2.Key Laboratory of Agricultural Land Quality of Ministry of Natural Resources, Beijing 100193, China) |
| Abstract: |
| Ecological network construction can reduce the patch fragmentation caused by rapid urbanization, help to increase network connectivity, and improve regional ecological stability. This study chooses Quzhou County, Hebei Province as the research object, uses morphological spatial pattern analysis(MSPA)and minimum cumulative resistance model(MCR)to construct the ecological network. Ecological corridors are classified based on gravity model and the study compares the network structure index before and after optimization to quantitatively investigate the optimization effect. The results show that: 1)Quzhou County has nine ecological sources, which are mainly distributed around the central county and the northeast forest farm, unevenly distributed ecological corridor and simple ecological network structure. 2)The optimization measures mainly include adding three new ecological sources, supplementing five stepping stones, dividing corridors into seven important corridors, fifteen construction corridors and eight planning corridors, constructing five water corridors, focusing on protecting twenty seven ecological nodes and repairing twelve ecological discontinuities. After optimization, the connectivity and ring connectivity of Quzhou County's ecological network are greatly improved. 3)Construction area affects the construction feasibility of ecological corridors and the ecological corridors with high interaction force have high construction feasibility. Finally, the ecological structure of Quzhou County is optimized from both internal and external aspects of network structure and construction, and the ecological structure layout of “two axes, three areas, four corridors and multiple points” is put forward. This study can provide a reference for improving the ecological protection effect of Quzhou County and even the construction of ecological network in North China Plain. |
| Key words: ecological network morphological spatial pattern analysis minimum cumulative resistance model Quzhou County |
