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作者

来源

HABITAT INTERNATIONAL,Vol.71,P.110-124

语言

英文

关键字

Ecological security patterns; Ecological degradation risk; Group corridor; Landscape corridor; Ecological protection boundary; Shenzhen City, China; LAND-COVER PATTERN; ECOSYSTEM SERVICES; SHENZHEN CITY; BIODIVERSITY CONSERVATION; SPATIAL RESILIENCE; CHIN

作者单位

[Peng, Jian; Pan, Yajing; Liu, Yanxu; Wang, Yanglin] Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China. [Zhao, Huijuan] Peking Univ, Shenzhen Grad Sch, Key Lab Environm & Urban Sci, Shenzhen 518055, Peoples R China. Peng, J (reprint author), Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China. E-Mail: jianpeng@urban.pku.edu.cn

摘要

Ecological security patterns (ESPs) aim to provide an effective spatial approach for maintaining urban ecological security based on the relationship between landscape patterns and ecological processes. However, the methods of selecting ecological security sources and evaluating resistance surfaces for ESPs construction are not well developed and lack consideration of land degradation and spatial heterogeneity. Using Shenzhen City, a fast-growing city in a rapidly urbanizing region, as a case study area, this study evaluated two types of land degradation risk for ecological land: type transformation risk and functional damage risk. Both two kinds of risk were combined with ecological functional importance, which was composed of habitat quality and landscape connectivity, so as to quantify the comprehensive reserve value of ecological land to identify the ecological security sources. Ecological corridors were established with the application of remotely-sensed impervious surface area in the ecological resistance surface evaluation. In all, 477.43 km(2) ecological land were identified as ecological security sources, with 278.1 km and 197.5 km for the length of group corridors and landscape corridors respectively. The ecological corridors spatially presented a radiation pattern of one axis and three strips. The majority of both ecological security sources and corridors was located within the existing ecological protection boundary, confirming its ecological significance. This study provided an effective quantification framework to identify urban ESPs, and ESPs mapping could make a fundamental support to urban planning.