基于最小累积阻力模型的贵阳市景观生态安全格局构建

doi:10.11870/cjlyzyyhj201607006

Abstract

Abstract: Guiyang is a typical karst area in our country where water and soil erosion is serious and ecological environment is vulnerable. This research identifies ecological sources on the foundation of ecological importance, landscape connectivity and ecological demand. Ecological resistance surface is built by means of land use/cover, anthropogenic disturbance and nighttime light. Based on MCR model to recognize ecological corridor network, we built the landscape ecology security pattern of administrative region and downtown in Guiyang. The results showed that:(1) the area of the most important and important ecological patches was 5393.43 km² which were mainly distributed in the north and west. Landscape connectivity of these patches was generally good. Garden land was the best and forest land was the worst. Area with higher ecological demand was in the surrounding of built up area with dense population. Ecological sources accounting for 18.56% of the total area were located in the north area or somewhere like Hongfeng Lake and Baihua Lake in the southwest. (2) Ecological corridors were 933.58 kilometers long and the key corridor was 287.6 km long spanning from northeast to southwest. The current corridor that mainly consists of river system is all over the city. Nighty-eight percent of the potential corridor and the key corridor were forest and they were distributed in the hilly areas with good ecological environment. (3) According to the landscape ecological security pattern of downtown, ecological sources were located in some conservation areas such as Baihua Lake, Hongfeng Lake, Xiangzhi Valley and Xiangsi River. As the key corridor of downtown, Huaxi Wetland and Nanming River extended from south to north. Based on these results, this research put forward some ecological management measures which require simultaneous and considerate preservation, construction and planning to provide scientific and workable guidance for ecological environment constructions in Guiyang.

Key words: MCR model, ecological source, ecological corridor, ecological security pattern, Guiyang

CLC Number:

X171

MENG Ji-jun, WANG Ya, WANG Xiao-dong, ZHOU Zhen, SUN Ning. CONSTRUCTION OF LANDSCAPE ECOLOGICAL SECURITY PATTERN IN GUIYANG BASED ON MCR MODEL[J].RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2016, 25(07): 1052-1061.

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CONSTRUCTION OF LANDSCAPE ECOLOGICAL SECURITY PATTERN IN GUIYANG BASED ON MCR MODEL

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