ZHANG Xuemao,DONG Tingxu,DU Huaming,et al.Analysis on Spatial Heterogeneity of Landscape Ecological Risk in Fujiang River Basin[J].Research of Soil and Water Conservation,2022,29(03):156-163.
涪江流域景观生态风险空间异质性特征分析
- Title:
- Analysis on Spatial Heterogeneity of Landscape Ecological Risk in Fujiang River Basin
- 文章编号:
- 1005-3409(2022)03-0156-08
- Keywords:
- landscape ecological risk assessment; spatial principal component analysis; spatial autocorrelation analysis; spatial heterogeneity; Fujiang River Basin
- 分类号:
- X826
- 文献标志码:
- A
- 摘要:
- 对涪江流域景观生态风险进行评估可以为该区域制定生态风险防控措施、提高生态系统服务功能提供科学参考。从“自然—社会—景观格局”3个维度选择海拔、土壤类型、地表覆被类型等10个景观生态风险胁迫因子构建评价指标体系,利用空间主成分分析(SPCA)、空间自相关分析等方法对涪江流域景观生态风险的空间异质性特征展开了研究。结果表明:(1)整体上涪江流域的景观生态风险等级呈西北部高于东南部地区,并呈集聚分布模式,其中在松潘、平武、北川、安岳、潼南等区县形成了“热点”区域,梓潼、游仙、盐亭、中江等区县形成“冷点”区域,主要受自然和景观格局维度因子影响较为明显;(2)研究区处于中度及以上风险等级区的面积为25 596.51 km2,占流域总面积的65.36%,主要分布于上游的松潘、平武、北川等县(区);(3)景观类型与生态风险等级空间分布有密切的联系,低度、较低生态风险区的分布与涪江干流走向契合。涪江流域景观生态风险的空间异质性特征明显,且面临的生态风险问题较大。
- Abstract:
- The assessment of landscape ecological risks in the Fujiang River Basin can provide a scientific reference for the development of ecological risk prevention and control measures in the region and the improvement of ecosystem service functions. From the three dimensions of ‘nature-society-landscape pattern', 10 landscape ecological risk stress factors, including altitude, soil type, and land cover type, et al., were selected to construct an evaluation index system, and spatial principal component analysis, autocorrelation analysis, and other methods were used to analyze the spatial heterogeneity of landscape ecological risk in the Fujiang River Basin. The results show that:(1)as a whole, the landscape ecological risk level of the Fujiang River Basin is higher in the northwest than in the southeast, and it has a concentrated distribution pattern; among them, the ‘hot spot' areas in Songpan, Pingwu, Beichuan, Anyue, Tongnan and other districts and counties and ‘cold spot' areas in Zitong, Youxian, Yanting, Zhongjiang and other districts and counties have formed form, which are mainly affected by the dimensional factors of the natural and landscape pattern;(2)the study area is in the middle or above risk level area; the area is 25 596.51 km2, accounted for 65.36% of the total area of the basin, mainly distributes in the upstream counties(districts)such as Songpan, Pingwu and Beichuan;(3)landscape types are closely related to the spatial distribution of ecological risk levels, and the distribution of low-level and lower ecological risk areas coincides with the direction of the mainstream of the Fujiang River; the spatial heterogeneity of landscape ecological risks in the Fujian River Basin is obvious, and the ecological risks faced by them are large.
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备注/Memo
收稿日期:2021-04-22 修回日期:2021-05-14
资助项目:涪江流域土地利用覆被变化及生态环境效应研究(MYSY2018T003); 绵阳师范学院硕士研究生创新项目(CX202019); 绵阳师范学院科研启动项目(QD2016A001)
第一作者:张雪茂(1995—),女,四川省珙县人,硕士研究生,研究方向为生态环境监测与治理。E-mail:1505006095@qq.com
通信作者:董廷旭(1965—),男,四川省苍溪县人,教授,硕士生导师,主要从事3S技术集成与应用,土地利用与区域生态安全等方面研究。E-mail:852798223@qq.com