Construction and Optimization of Landscape Ecological Pattern in Jialing River Basin Based on ESV-ERI-MCR Evaluation

Yang Guangrong; Jiang Guiguo; Zhou Juan

doi:10.13961/j.cnki.stbctb.2024.03.014

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Construction and Optimization of Landscape Ecological Pattern in Jialing River Basin Based on ESV-ERI-MCR Evaluation

- Construction and Optimization of Landscape Ecological Pattern in Jialing River Basin Based on ESV-ERI-MCR Evaluation
- Bulletin of Soiland Water Conservation Vol. 44, Issue 3, Pages: 124-135(2024)
- 作者机构：
  
  四川师范大学地理与资源科学学院, 西南土地资源评价与监测教育部重点实验室,四川,成都,610066
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2024.03.014
  CLC： X171.1
- Published：2024
- 稿件说明：
移动端阅览
Yang Guangrong, Jiang Guiguo, Zhou Juan. Construction and Optimization of Landscape Ecological Pattern in Jialing River Basin Based on ESV-ERI-MCR Evaluation[J]. Bulletin of Soiland Water Conservation, 2024, 44(3): 124-135.
DOI：

Yang Guangrong, Jiang Guiguo, Zhou Juan. Construction and Optimization of Landscape Ecological Pattern in Jialing River Basin Based on ESV-ERI-MCR Evaluation[J]. Bulletin of Soiland Water Conservation, 2024, 44(3): 124-135. DOI： 10.13961/j.cnki.stbctb.2024.03.014.

摘要

[目的

]

分析嘉陵江流域景观生态格局，旨在增强生态系统服务功能，稳固生态系统从而降低生态风险，为促进区域可持续发展提供科学依据。[方法

]

以长江上游重要生态屏障嘉陵江流域为研究区，基于动态当量的生态系统服务价值(ESV)评价结果识别生态源地，基于最优空间尺度的景观生态风险(ERI)评价结果确定生态阻力面，再结合最小累积阻力模型(MCR)提取的生态廊道构建生态网络。[结果

]

①2005—2020年嘉陵江流域ESV呈北高南低格局和呈波动增长趋势。生态系统服务价值总计增加2.10×10

元，林地贡献率最高(50%)，依次为草地(25%)、耕地(14%)。 ②嘉陵江流域适宜分析粒度和幅度分别为150，750 m。2005—2020年ERI呈西北部高，中南部低格局和呈逐年降低趋势。 ③整个生态网络呈西北—东南向分布。共识别出生态源地11个，总面积36 297.19 km

，潜在生态廊道365条，生态节点133个。其中，重要生态廊道47条，重要生态节点39个。 ④建设的重点生态保护区作为新增生态源地，为嘉陵江流域限制开发区域。新增道路型生态廊道6条，绿带型生态廊道3条，河流型生态廊道13条，生态节点24个。[结论

]

优化后嘉陵江流域生态网络密度增加，贯穿了全方位的生态源地，整体连通度得以提升。研究成果可为流域生态格局修复、生态保护策略和可持续发展提供新思路。

Abstract

[Objective] The landscape ecological pattern of the Jialing River basin was analyzed to enhance ecosystem service functions and stabilize the ecosystem to reduce ecological risks

thereby providing a scientific basis for promoting regional sustainable development. [Methods] The study was conducted for the Jialing River basin

an important ecological barrier in the upper reaches of the Yangtze River. The dynamic equivalent ecological service value model (ESV) evaluation results were used to identify ecological sources based on the optimal spatial scale of the ecological risk index model (ERI) evaluation results to determine the ecological resistance surface. These results were combined with the minimal cumulative resistance model (MCR) to extract an ecological corridor construction landscape network. [Results] ① From 2005 to 2020

ESV in the Jialing River basin was high in the north and low in the south

with a fluctuating growth trend. In total

ecosystem service value increased by 2.10×1010 yuan

and the contribution rate of woodland was the highest (50%)

with contribution rates of 25% for grassland and 14% for farmland. ② The particle size and amplitude for suitable analysis in the Jialing River basin were 150 m and 750 m

respectively. From 2005 to 2020

ERI showed a pattern of higher in the northwest and lower in the central and south

with a decreasing trend over time. ③ The entire ecological network distribution presented a northwest-southeast direction. Eleven ecological sources were identified

with a total area of 36 297.19 km2

365 potential ecological corridors

and 133 ecological nodes. Among them

there were 47 important ecological corridors and 39 important ecological nodes. ④ Key ecological protection areas should be constructed as new ecological sources

and development in the Jialing River basin should be restricted. There are six road-type ecological corridors

three green-type ecological corridors

13 river-type ecological corridors

and 24 ecological nodes were identified. [Conclusion] After optimization

the ecological network density of the Jialing River basin increased

running through the full range of ecological sources

and the overall connectivity was improved. These results could provide new ideas for the pattern of ecological watershed restoration

and strategies for ecological protection and sustainable development.

关键词

Keywords

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