Landscape Eco-risk Assessment and Its Spatio-temporal Variation of Tuojiang River Basin Based on Value of Ecological Services

Chen Dan; Jiang Guiguo; Zhang Yan; Tu Yue; Deng Yuanjie

doi:10.13961/j.cnki.stbctb.2019.03.037

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Landscape Eco-risk Assessment and Its Spatio-temporal Variation of Tuojiang River Basin Based on Value of Ecological Services

- Landscape Eco-risk Assessment and Its Spatio-temporal Variation of Tuojiang River Basin Based on Value of Ecological Services
- Bulletin of Soiland Water Conservation Vol. 39, Issue 3, Pages: 223-230(2019)
- 作者机构：
  
  1. 四川师范大学西南土地资源评价与监测教育部重点实验室,四川,成都,610068
  2. 四川师范大学地理与资源科学学院,四川,成都,610068
  3. 西北农林科技大学经济管理学院, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.03.037
  CLC： F205;K825.89
- Published：2019
- 稿件说明：
移动端阅览
Chen Dan, Jiang Guiguo, Zhang Yan, et al. Landscape Eco-risk Assessment and Its Spatio-temporal Variation of Tuojiang River Basin Based on Value of Ecological Services[J]. Bulletin of Soiland Water Conservation, 2019, 39(3): 223-230.
DOI：

Chen Dan, Jiang Guiguo, Zhang Yan, et al. Landscape Eco-risk Assessment and Its Spatio-temporal Variation of Tuojiang River Basin Based on Value of Ecological Services[J]. Bulletin of Soiland Water Conservation, 2019, 39(3): 223-230. DOI： 10.13961/j.cnki.stbctb.2019.03.037.

摘要

[目的

]

探究沱江流域基于生态服务价值的生态风险时空分异的特征，为基于生态服务价值的沱江流域生态风险管控决策提供一定依据。[方法

]

借助ArcGIS，GeoDa，GS

和Conefor Sensinode等软件，以沱江流域为研究区，基于2000，2005，2010和2015年4期遥感土地利用数据，计算研究区生态服务价值，对生态风险计算方法进行改进，构建基于生态服务价值的生态风险评价指标体系，运用空间自相关分析和地统计分析方法，探讨位于快速城市化地区的沱江流域生态风险的时空分异规律。[结果

]

①沱江流域土地利用动态变化显著，用地类型以耕地转建设用地和林地转耕地为主。②沱江流域生态服务价值总量先增后降，耕地、林地对生态服务价值的贡献最大。③生态风险值总体呈上涨趋势，生态风险等级由以较低、中等生态风险为主向以中等生态风险为主转移，中等生态风险区域面积大幅增加。④研究区生态风险等级分布差异明显，高风险区和较高风险区主要分布在研究区北部，中等和较低风险区分布在研究区中部和南部，生态风险总体北大于南。[结论

]

土地利用变化会对生态服务价值产生重要影响，进而对沱江流域的生态风险产生影响。

Abstract

[Objective] The temporal and spatial variation of ecological risks in Tuojiang River Basin based on the value of ecological services was explored in order to provide a basis for ecological risk management and control in the area.[Methods] By using ArcGIS

GeoDa

GS+ and Conefor Sensinode software

taking Tuojiang River basin as the study area

based on the land use data derived from remote sensing images in 2000

2005

2010 and 2015

the ecological service value in the study area was calculated

then the calculation method of ecological risk was improved

and the evaluation index system of ecological risk based on ecological service value was constructed. The spatial autocorrelation analysis and statistical analysis methods were then used to investigate the spatio-temporal variation of ecological risk in Tuojiang River basin in the rapid urbanization areas.[Results] ① The dynamic change of land use in Tuojiang River basin was remarkable. The main land types were conversion of arable land to construction land and forestland to arable land. ② The total value of ecological services in Tuojiang River basin increased firstly and then decreased

and the contribution of farmland and forestland to the value of ecological services was the greatest. ③ The ecological risk value showed an increasing trend. The ecological risk level was shifted from low and medium ecological risk to medium ecological risk

and the area of medium ecological risk increased significantly. ④ The variation of the ecological risk level distribution in the study area was great. The high risk and relative high risk areas were mainly distributed in the north of the study area

while the medium and lower risk areas were mainly distributed in the middle and south of the study area. The overall ecological risk was greater in the north than in the south.[Conclusion] Land use change have an important impact on the value of ecological services

which in turn will have an impact on the ecological risk of the Tuojiang River basin.

关键词

Keywords

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