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王鹏,王亚娟,刘小鹏.基于景观结构的生态移民安置区生态风险评价*—以宁夏红寺堡区为例.生态学报,2018,(8).http://dx.doi.org/10.5846/stxb201704280784  
基于景观结构的生态移民安置区生态风险评价*—以宁夏红寺堡区为例
Ecological risk assessment of ecological migrant resettlement region based on landscape structure : a case study of Hongsibu in Ningxia
投稿时间:2017-04-28  修订日期:2017-12-01
DOI: 10.5846/stxb201704280784
关键词生态移民安置区  景观格局指数  生态风险指数  地理探测器  红寺堡区
Key WordsEcological resettlement area  Landscape pattern index  Ecological risk index  Geographical detector  Hongsibu district
基金项目国家自然科学基金项目(41461039)
作者单位E-mail
王鹏 宁夏大学资源环境学院 银川 775767923@qq.com 
王亚娟 宁夏大学资源环境学院 银川 wangyj@nxu.edu.cn 
刘小鹏 宁夏大学资源环境学院 银川  
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摘要:
本文以宁夏自治区红寺堡区为例,以1995年、2000年、2005、2010年和2015年五期遥感影像为数据源,综合运用景观格局指数、生态风险指数、空间分析法以及地理探测器等多种研究方法,研究了移民安置区生态风险时空特征。结果表明:1995—2015年研究区景观格局发生了较大的变化,草地面积减少了2.97×104hm2,耕地、林地、建设用地分别增加了1.90×104hm2,0.42×104hm2和0.43×104hm2;在研究期间景观整体斑块数不断增加,其景观整体破碎度随之变大;研究区生态风险主要以较低风险和中风险为主,其中建设用地、沙地和未利用地生态风险值较高,在研究期间生态风险平均值由0.166降低至0.154,研究区生态风险值呈降低趋势。通过地理探测器诊断得出景观斑块数、景观破碎度、景观优势度、景观损失度、斑块密度等因素是安置区生态风险的主要影响因素。
Abstract:
In this paper,the five period remote sensing images of 1995,2000,2005,2010 and 2015 were selected as data sources,the comprehensive research methods of landscape pattern index and ecological risk index, spatial analysis and geographic detector were used to study the temporal and spatial characteristics of the ecological migration resettlement region. The results showed that :the landscape pattern of the study area changed greatly from 1995 to 2015,the area of grassland decreased by 2.97 × 104hm2,and the cultivated land,forest land and construction land increased by 1.90 × 104hm2,0.42 × 104hm2 and 0.43 × 104hm2respectively.During the study period,the overall patch number of the landscape was increasing,and the overall fragmentation of the landscape become larger accordingly.The ecological risk of the study area was dominated by the lower risk and the middle risk,and the ecological risk value of the construction land,the sandy land and the unused land High,the average ecological risk decreased from 0.166 to 0.154 during the study period,and the ecological risk value of the study area showed a decreasing trend.Through the diagnosis of the geographical detectors,the landscape patch number,landscape fragmentation degree,landscape dominance degree,landscape loss degree and patch density were found as the main influencing factors of ecological risk in the resettlement area.
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