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中国农学通报 ›› 2015, Vol. 31 ›› Issue (29): 82-89.doi: 10.11924/j.issn.1000-6850.casb15050027

所属专题: 资源与环境 农业生态

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于景观类型的北京市生态风险时空特征分析

段晓艳,胡业翠   

  1. 中国地质大学北京土地科学技术学院,中国地质大学北京土地科学技术学院
  • 收稿日期:2015-05-06 修回日期:2015-09-22 接受日期:2015-08-25 出版日期:2015-10-28 发布日期:2015-10-28
  • 通讯作者: 胡业翠
  • 基金资助:
    国家自然科学基金资助项目“西南喀斯特生态移民区土地利用与生态系统互动效应及调控机制研究”(41171440)。

Spatial Temporal Characteristic Analysis of Ecological Risk Based on Landscape Type in Beijing

  • Received:2015-05-06 Revised:2015-09-22 Accepted:2015-08-25 Online:2015-10-28 Published:2015-10-28

摘要: 生态风险评价作为一种综合评估区域内各类型生态系统的生态风险值的重要方法,如何定性定量地对其进行客观研究,一直是生态学研究的热点。笔者以北京为研究对象,通过构建生态风险指数,借助空间自相关模型和地统计学方法,对北京生态风险的空间分布特征、变异规律以及空间关联格局进行探讨。结果表明:在2000—2010年北京市快速发展的11年间,北京各景观类型面积变化幅度为水域>人工>农田>草地>未利用地>森林;研究区内土地利用生态风险水平存在一定的空间正相关性,并随粒级增大而下降;2000—2010年,北京市生态风险呈现先下降后上升趋势,生态风险强度以城区为中心向郊区、远郊区呈放射状逐渐增加。

关键词: 农村电力市场, 农村电力市场, 金融期权, 市场均衡, 古诺模型

Abstract: Ecological risk evaluation is an important method for evaluating ecological risk values of regional ecosystems of different types. How to evaluate the ecological risk quantitatively and qualitatively has always been the hot spot in ecological research. In this paper, the authors constructed a group of ecological risk index, and studied the spatial distribution characteristics, variation pattern and spatial correlation pattern of ecological risk in Beijing through spatial autocorrelation model and geo-statistics. The results showed that during the rapid development from 2000 to 2010, the change in area of landscape types in Beijing ranked in sequence as: water>artificial>farmland>grassland>unutilized land>forest; ecological risk of land use had positive spatial correlation in a certain extent and decreased as the fraction size increasing; ecological risk in Beijing decreased firstly and then increased during 2000 to 2010, the strength of ecological risk showed a trend of radial gradual increase from urban to the suburbs and exurbs.

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