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冰川冻土 ›› 2015, Vol. 37 ›› Issue (3): 835-844.doi: 10.7522/j.issn.1000-0240.2015.0093

• 生态经济与可持续发展 • 上一篇    下一篇

城市化过程中都市农业景观变化及其生态安全评价——以西安市为例

宋晓媚, 周忠学, 王明   

  1. 陕西师范大学 旅游与环境学院, 陕西 西安 710119
  • 收稿日期:2014-11-01 修回日期:2015-03-10 出版日期:2015-06-25 发布日期:2015-09-29
  • 通讯作者: 周忠学, E-mail: zhouzhx@snnu.edu.cn. E-mail:zhouzhx@snnu.edu.cn
  • 作者简介:宋晓媚(1990-), 女, 河北衡水人, 2013年毕业于邢台学院, 现为陕西师范大学在读硕士研究生, 主要从事区域开发与城乡发展研究. E-mail: 1083979226@qq.com
  • 基金资助:
    国家自然科学基金项目(41271550);教育部人文社会科学研究西部和边疆地区项目(12XJC790003)资助

Evaluation of the change of urban agricultural landscape and its ecological security under urbanization: a case study in Xi'an City

SONG Xiaomei, ZHOU Zhongxue, WANG Ming   

  1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710119, China
  • Received:2014-11-01 Revised:2015-03-10 Online:2015-06-25 Published:2015-09-29

摘要: 快速城市化过程中都市农业景观变化及其生态安全研究是城市化区域生态安全和可持续发展研究的重要课题. 构建都市农业景观生态安全评价指标与方法, 探讨城市化对都市农业景观生态安全的影响具有重要的科学意义. 以西安市为例, 应用GIS和RS技术方法, 结合"压力-状态-响应"(PSR)模型建立了都市农业景观生态安全综合评价指标体系, 通过提取1999、2006和2013年的农业景观类型信息, 定量分析了都市农业景观变化特征、动态评价了都市农业景观生态安全过程. 结果表明: 1999-2013年西安市农业景观结构变化剧烈, 景观斑块数量增加、平均斑块面积减小, 聚集度变差, 景观趋于复杂化、破碎化, 耕地、林地面积显著减少, 园地面积增加. 城市化的快速发展导致都市农业生态安全压力指数由0.43上升为0.59, 生态安全状态指数由0.73降至0.28, 生态安全响应指数则由0.26上升为0.77, 生态系统服务价值下降; 城市化过程带来的景观压力指数上升以及景观状态指数下降, 使得都市农业景观生态安全综合指数由0.56先下降为0.4, 后上升到0.48. 城市化过程中的都市农业景观生态安全评价可以为都市农业可持续发展、土地可持续利用管理和科学决策提供依据.

关键词: 城市化, 都市农业景观, 生态安全, 西安市

Abstract: Research on dynamic changes of urban agricultural landscape and its eco-security is an important topic of ecological security and sustainable development in urbanizing area. Establishing the comprehensive indicators on eco-security evaluation of urban agricultural landscape and exploring the impact of urbanization on urban agricultural landscape eco-security have important scientific significance. In this paper, Xi'an City was selected as the study area. Applying GIS and RS techniques and basing on the PSR Model, the comprehensive indicators on eco-security evaluation of urban agricultural landscape were established. By extracting the agricultural landscape types of 1999, 2006 and 2013, the characteristics of landscape change were quantitatively analyzed and the process of urban agricultural landscape eco-security was evaluated dynamically. The results showed that: 1) the agricultural landscape structure of the study area had changed dramatically from 1999 to 2013, and the patch number of urban agricultural landscape was increasing, but the mean patch size and aggregation index were decreasing; the fragmentation of urban agricultural landscape was obvious and the area of arable land and forest was reducing significantly, while the area of orchard was increasing; 2) the pressure index of urban agricultural eco-security rose from 0.43 to 0.59; the status index of ecological security declined from 0.73 to 0.28 and the response index of ecological security rose from 0.26 to 0.77; the value of ecosystem services declined because of the rapid development of urbanization; 3) the urbanization process caused pressure to urban agricultural landscape and resulted in poor landscape status; the composite index of urban agricultural eco-security rose to 0.48 after a decline from 0.56 to 0.4. The evaluation of urban agricultural eco-security under the landscape change would provide some instructions for the sustainable development of urban agriculture and land use management in Xi'an City.

Key words: urbanization, urban agricultural landscape, ecological security, Xi'an City

中图分类号: 

  • Q149