1.西南林业大学水土保持学院,昆明 650224
2.国家林业和草原局云南沾益岩溶生态系统定位观测研究站, 昆明 650224
3.云南省山地农村生态环境演变与污染治理重点实验室,昆明 650224
邓斐枫(1998—),女,硕士研究生,主要从事生态修复治理研究。E-mail:18789806516@163.com
齐丹卉(1979—),女,副教授,硕士生导师,主要从事石漠化治理、生态修复研究。E-mail:7942965@qq.com
收稿:2026-04-27,
修回:2026-05-29,
录用:2026-06-08,
网络首发:2026-09-07,
纸质出版:2026-10-28
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邓斐枫,唐继敏,余哲修,等.耦合生态系统服务功能与景观格局的珠江上游生态网络优化[J].水土保持学报,2026,40(5):364-374.
Deng Feifeng, Tang Jimin, Yu Zhexiu, et al. Ecological network optimization in the upper Pearl River basin by coupling ecosystem services with landscape patterns[J]. Journal of Soil and Water Conservation,2026,40(5):364-374.
邓斐枫,唐继敏,余哲修,等.耦合生态系统服务功能与景观格局的珠江上游生态网络优化[J].水土保持学报,2026,40(5):364-374. DOI: 10.13870/j.cnki.stbcxb.2026.05.035. CSTR: 32310.14.stbcxb.2026.05.035.
Deng Feifeng, Tang Jimin, Yu Zhexiu, et al. Ecological network optimization in the upper Pearl River basin by coupling ecosystem services with landscape patterns[J]. Journal of Soil and Water Conservation,2026,40(5):364-374. DOI: 10.13870/j.cnki.stbcxb.2026.05.035. CSTR: 32310.14.stbcxb.2026.05.035.
目的
2
为应对珠江上游喀斯特地区生态退化、景观破碎化与连通性下降等问题,构建耦合生态系统服务功能与景观格局的生态网络优化框架,为流域生态保护与国土空间治理提供依据。
方法
2
以珠江上游为研究区,依托InVEST模型量化水源涵养、土壤保持与固碳释氧三大核心服务功能,结合形态学空间格局分析(MSPA)提取核心景观要素,通过空间叠置筛选生态源地;进而融合多源自然-社会数据构建综合生态阻力面,借助电路理论与Linkage Mapper识别生态廊道、夹点与障碍点,进而提出生态网络优化策略。
结果
2
研究共识别优质生态源地29个,总面积4 728.27 km²,主要集聚于东南部山地,与“西北高、东南低”的综合阻力格局形成强烈反差。基于电路理论提取74条生态廊道,总长3 274.82 km,整体呈“东密西疏”的非均衡分布特征;同时识别出23处生态夹点和31处生态障碍点,主要分布于地形收束与人为扰动叠加的关键瓶颈区域。
结论
2
喀斯特恶劣基底与人类活动的“双重空间挤压”,致使珠江上游生态网络呈现强烈的空间极化与结构脆弱性。由此确立的“一核、两轴、三区、多点”空间优化蓝图,提出分区管控与靶向修复相结合的差异化策略,为西南喀斯特流域生态安全格局构建与生态韧性提升提供科学支撑。
Objective
2
To address issues including ecological degradation, landscape fragmentation, and decreased connectivity in the karst region of the upper reaches of the Pearl River, this study constructs an ecological network optimization framework that couples ecosystem service functions and landscape patterns, thereby providing a scientific basis for watershed ecological protection and territorial spatial governance.
Methods
2
Taking the upper reaches of the Pearl River as the study area, this study quantified three core ecosystem service functions: water conservation, soil conservation, and carbon sequestration and oxygen release-based on the InVEST model. Combined with morphological spatial pattern analysis (MSPA), core landscape elements were extracted, and ecological sources were screened through spatial overlay. On this basis, a comprehensive ecological resistance surface was constructed by integrating multi-source natural-social data. Circuit theory and Linkage Mapper were adopted to identify ecological corridors, pinch points, and barrier points, and then an optimization strategy for the ecological network was proposed.
Results
2
A total of 29 high-quality ecological sources were identified in this study, with a total area of 4 728.27 km², mainly concentrated in the mountainous areas of the southeast, forming a sharp contrast with the comprehensive resistance pattern of "high in the northwest and low in the southeast". Based on circuit theory, 74 ecological corridors were extracted, with a total length of 3 274.82 km, showing an overall unbalanced distribution pattern of "dense in the east and sparse in the west". Meanwhile, 23 ecological pinch points and 31 ecological barrier points were identified, which were mainly distributed in key bottleneck areas where topographic constriction and human disturbance overlapped.
Conclusion
2
The "dual spatial extrusion" from the unfavorable karst substrate and human activities leads to strong spatial polarization and structural vulnerability of the ecological network in the upper reaches of the Pearl River. The spatial optimization blueprint of "one core, two axes, three zones, and multiple points" established in this study, combined with the differentiated strategy of integrating zonal management and targeted restoration, provides scientific support for the construction of ecological security patterns and the improvement of ecological resilience in southwest karst watersheds.
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