JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (4): 771-784.doi: 10.31497/zrzyxb.20190408

• Resource Ecology • Previous Articles     Next Articles

Analysis of spatial heterogeneity of ecological security based on MCR model and ecological pattern optimization in the Yuexi county of the Dabie Mountain Area

HUANG Mu-yi1(), YUE Wen-ze2(), FENG Shao-ru1, CAI Jie-jie1   

  1. 1. School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
    2. Department of Land Resources Management, Zhejiang University, Hangzhou 310058, China
  • Received:2018-12-07 Revised:2019-02-19 Online:2019-04-20 Published:2019-04-20

Abstract:

Taking Yuexi county, the core area of Dabie Mountain, which is a focus in China's targeted poverty alleviation campaign, as the research unit, and based on remote sensing and GIS platform, we selected ten ecological resistance factors, namely, elevation, slope, land use type, vegetation coverage, soil erosion, and distance from tourist spot, industrial land, water area, road, residential areas, to establish an ecological security evaluation index system. With the aid of ArcGIS, ecological security level was evaluated and potential ecological corridor recognition was extracted, through Exploratory Spatial Data Analysis (ESDA) method, Minimum Cumulative Resistance (MCR) model and gravity model, to build ecological resistance. The results showed that: The high and higher level regions accounted for 37.79% of the total area of the county, while the low and lower ranking regions accounted for 51.89%, which present the spatial characteristics that the low level ecological security units were distributed in the north part, while the high level ones were in the south part, and that the overall ecological security level was relatively low in the county. Secondly, the spatial distribution characteristics of ecological security by means of ESDA analysis method indicated that the global Moran's I index was 0.6374, and LISA figure showed that there were mainly high (HH) and low (LL) types of aggregation for ecological security level, and the ecological security had a significant spatial clustering characteristic in Yuexi county. On this basis, good habitat in the nature reserve and large scenic spot patches were chosen as the ecological source, which is the first step for ecological source cumulative cost resistance surface generated by cost distance tool of ArcGIS. Then, the minimum cumulative cost path and the potential ecological corridor were identified and constructed based on MCR model. The results showed that a total of 21 important potential ecological corridors and 103 ecological nodes were identified and extracted, including 13 first-level corridors and 8 secondary corridors by means of gravity model. Finally, according to the characteristics of the tourism poverty alleviation industry and ecological economic development in the study area, the paper put forward the layout model of "one ring and three zones" ecological corridor network framework and some optimization countermeasures. This model is an effective supplement to the development pattern of ecological economy industry in Yuexi county.

Key words: ecological security, spatial heterogeneity, minimum cumulative resistance model, ecological corridor, Yuexi county, Dabie Mountain Area