基于土地利用变化的盐城海岸带生态风险评价

发布时间：2018-05-14 20:11

本文选题：景观结构 + 土地利用变化　；参考：《地理研究》2016年06期

【摘要】：在GIS和RS技术支持下,以行政区划为评价单元,从景观结构角度构建生态风险评价模型,借助地统计分析及空间自相关分析方法,对盐城海岸带地区2000-2010年景观生态风险的时空分异特征进行定量评价。结果表明:2000-2010年,盐城海岸带地区整体生态环境质量有所下降。10年间,研究区生态风险平均值从0.35增长至0.39,高等级生态风险区不断增加。土地利用生态风险程度整体空间分异性不断增加,局部呈现高—高聚集和低—低聚集。较高风险区和高风险区主要分布于射阳县、大丰市大丰港以北的沿海区域以及东台_6港附近,其原因主要是随着沿海开发的推进,临港产业和临海城镇的发展,海岸带土地利用变化加剧,沿海地区生态系统稳定性被破坏。
[Abstract]:With the support of GIS and RS technology, the ecological risk assessment model was constructed from the view of landscape structure with the administrative division as the evaluation unit, and the methods of geostatistical analysis and spatial autocorrelation analysis were used. The temporal and spatial characteristics of landscape ecological risk in Yancheng coastal zone from 2000 to 2010 were quantitatively evaluated. The results showed that from 2000 to 2010, the ecological risk of the study area increased from 0.35 to 0.39, and the ecological risk area of the high grade ecological risk area increased continuously during the period of 2000 to 2010, the overall ecological environment quality of the coastal zone of Yancheng decreased somewhat, and the average ecological risk increased from 0.35 to 0.39. The whole spatial heterogeneity of land use ecological risk degree is increasing, local high-high aggregation and low-low aggregation. The high risk areas and high risk areas are mainly distributed in Sheyang County, the coastal areas north of Dafeng Port in Dafeng City and the vicinity of Port 6 Dongtai. The main reason is the development of port industry and coastal towns along with the development of coastal development. Land use change in coastal zone is aggravated and ecosystem stability in coastal area is destroyed.
【作者单位】：南京大学地理与海洋科学学院;南京大学海岸与海岛开发教育部重点实验室;
【基金】：国家自然科学基金项目(41206092) 国家“十二五”科技支撑项(2013BAC03B0408)
【分类号】：X826

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