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• 研究报告 • 上一篇    下一篇

深圳市景观生态风险多尺度关联分析

张甜,刘焱序,彭建,王仰麟*   

  1. (北京大学城市与环境学院地表过程分析与模拟教育部重点实验室, 北京 100871)
  • 出版日期:2016-09-10 发布日期:2016-09-10

Correlation of the landscape ecological risk on multi-scales in Shenzhen City.

ZHANG Tian, LIU Yan-xu, PENG Jian, WANG Yang-lin*#br#   

  1. (Laboratory for Earth Surface Process, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China).
  • Online:2016-09-10 Published:2016-09-10

摘要:

评价城市景观生态风险可以为城市景观管理和综合风险防范提供定量依据。针对城市景观生态风险在各尺度上相互关系不明确的问题,本研究选择深圳市6种代表性景观生态风险,采用通用水土流失方程、生境质量评价模型等方法计算各风险在像元、流域、街道办尺度上的相关性。结果表明:深圳市景观生态风险平均值与变异系数高值区分别位于城市西部、北部和东南部;土壤侵蚀风险与其他风险呈显著负相关(P<0.05),而城市热岛、生境受损、地表硬化、人群聚集风险之间呈显著正相关(P<0.05);景观多样性与风险的关联性随统计尺度增大而增强。景观连通性与景观生态风险正相关,这与一般认知有所差异,体现了城市景观格局的特殊性。不同尺度下风险关联的显著性发生改变,印证了多尺度综合风险防范的城市管理需求。
 

关键词: 籽粒产量, 氮素吸收效率, 极端晚播, 冬小麦, 蛋白质含量

Abstract: Assessment of urban landscape ecological risk could be the quantitative basis of the urban landscape management and the comprehensive risk prevention. In view of the ambiguous relationships of urban landscape ecological risks on various scales, we calculated the correlation of six representative landscape ecological risks on the scales of pixels, watersheds, and subdistricts in Shenzhen City by using the Revised Universal Soil Loss Equation (RUSLE) and the habitat quality evaluation model. The results showed that the higher average value and variation coefficient of the landscape ecological risks in Shenzhen City were found in the western, northern and southeast parts. The soil erosion risk presented a significant negative correlation (P<0.05) with the other risks, while a significant positive correlation (P<0.05) was found among the four risks of urban heat island, habitat damage, surface hardening and crowd gathering. Moreover, the correlation between the landscape diversity and risk increased with the enlargement of the statistical scale. Urban landscape ecological risk was positively correlated to landscape connectivity, which is quite different from the previous studies and reflects the particularity of urban landscape pattern. Therefore, changes in the relationship among urban landscape ecological risks at various scales confirm the needs of multi-scale comprehensive risk prevention of city management.

Key words: grain yield, N uptake efficiency., protein content, extremely-late sowing, winter wheat