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[1]WANG Zhijie,DAI Lei,ZHOU Xuexia,et al.Spatiotemporal Characteristics of Patch Pattern of Mosaic Mountain in Typical Karst Mountainous Cities[J].Research of Soil and Water Conservation,2022,29(03):197-204.

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Spatiotemporal Characteristics of Patch Pattern of Mosaic Mountain in Typical Karst Mountainous Cities

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 197-204 Column: Public date: 2022-04-20

Title:: Spatiotemporal Characteristics of Patch Pattern of Mosaic Mountain in Typical Karst Mountainous Cities

Author(s):: WANG Zhijie^1,2, DAI Lei¹, ZHOU Xuexia¹, HU Changyue¹, SU Yuan³; (1.College of Life Sciences, Guizhou University, Guiyang 550025, China; 2.Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering, Guiyang 550025, China; 3.College of Forestry, Guizhou University, Guiyang 550025, China)

Keywords:: pattern changes; mountain landscape patch; exploratory spatial data model; potential ecological connectivity; karst mountainous cities

CLC:: P968; S766; X24

DOI:: -

Abstract:: The mosaic mountain landscape in karst mountainous cities plays an important role in biodiversity protection, ecosystem health and stability, and ecosystem services. In order to reveal the spatiotemporal variation of mosaic mountain patches in karst mountainous cities, taking the central urban area of Guiyang City center as an example, we used the high-resolution remote sensing images from 2000 to 2020, and adopted GIS spatial analysis, exploratory spatial data model and landscape pattern analysis etc., to analyze the spatiaotemporal characteristics of mosaic mountain patch pattern under the background of rapid urbanization from the aspects of scale, morphology and spatial distribution. The results show that:(1)the number and area of mountain patches widely distributed in the central urban area; In the past 20 years, the number and area of mountain patches had decreased by 30 and 25.2%, respectively, showing the characteristics of cutting and smashing first and then annexing and occupying; the area and quantity of large mountains decreased continuously, while the number and area of other types of mountains presented a change trend of ‘first increase and then decrease';(2)the shape of mountain patches was relatively regular with the fractal dimension close to 1; from 2000 to 2020, the shape of mountain patches presented a trend of complexity and fragmentation. the shape index increased by 1.12 times; the shapes of large and medium-sized mountain patches tended to be more regular, while the other types of mountain patches were increasingly complex and fragmented;(3)the mountain patches had significant spatial aggregation effect with the average nearest neighbor ratio ranging from 0.766 9 to 0.841 4, and the Z value of Getis-Ord General less than -2.58; the aggregation of small mountain patches was dominant, and the distribution had obvious spatial heterogeneity; however, the spatial aggregation effect weakened, the high-density area gradually shrunk, and the low-density area continued to spread and showed a concentrated contiguous trend; and the potential ecological connectivity level of mountain landscape patches continued to decrease.

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Last Update: 2022-04-20