合肥中心城区生态网络时空演变及生态效应研究(1994-2017年)

Spatial-Temporal Evolution and Ecological Effects of Ecological Networks in Downtown of Hefei from 1994 to 2017

以合肥中心城区1994-2017年5期遥感影像,结合土地利用现状图为基础数据,运用景观生态学“斑块-廊道-基质”理论,从土地利用变化视角分析生态网络各组成要素的空间格局、分布及数量变化情况,进一步探讨城市生态网络时空演变特征及生态效应。结果表明:研究期内,2000-2006年,绿地网络空间破碎化,廊道割裂;进入2010年,公园绿地的增加带来城市网络系统结构的变化:斑块间的连接开始向好的趋势发展,斑块破碎化现象有所缓解;后因建设用地的持续扩张,加剧了网络空间的破碎化。建议对“斑块-廊道-基质”空间进行分类保护与修复策略,逐步推进区域内生态斑块、廊道的保护以及生态网络修复规划与建设。

Taking the land use map of Hefei Central City from 1994 to 2017 as the data source.Based on the theory of plaque-corridor-matrix.This paper analyzes the spatial pattern and quantity changes of various components of ecological network in the perspective of land use change,and then studies the spatial and temporal evolution characteristics and ecological effects.The results show that during the study period,from 2000 to 2006,the green space network was fragmented and the corridor was split;In 2010,the increase in park green space brought about changes in the structure of urban network systems:the connection between plaques began to develop towards a good trend,and the phenomenon of plaque fragmentation was alleviated;Later,due to the continuous expansion of construction land,the fragmentation of cyberspace has been aggravated.It is recommended to classify and protect the plaquecorridor-substrate space,and gradually promote the protection of ecological patches,corridors and ecological network restoration planning and construction.