深圳市景观生态风险多尺度关联分析

被引：24

作者：

张甜

刘焱序

彭建

王仰麟

机构：

[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

来源：

生态学杂志 | 2016年 / 35卷 / 09期

关键词：

景观生态风险; 景观指数; Spearman相关性; 主成分分析; 多尺度;

D O I：

10.13292/j.1000-4890.201609.005

中图分类号：

TU984.115 [];

学科分类号：

081303 ; 083302 ; 1204 ;

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。

引用

页码：2478 / 2486

页数：9

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