JOURNAL OF NATURAL RESOURCES >
Analysis of spatial heterogeneity of ecological security based on MCR model and ecological pattern optimization in the Yuexi county of the Dabie Mountain Area
Received date: 2018-12-07
Request revised date: 2019-02-19
Online published: 2019-04-20
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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.
HUANG Mu-yi , YUE Wen-ze , FENG Shao-ru , CAI Jie-jie . Analysis of spatial heterogeneity of ecological security based on MCR model and ecological pattern optimization in the Yuexi county of the Dabie Mountain Area[J]. JOURNAL OF NATURAL RESOURCES, 2019 , 34(4) : 771 -784 . DOI: 10.31497/zrzyxb.20190408
Fig. 1 Scope and location of the Yuexi County图1 岳西县范围及地理区位 |
Table 1 Classification of ecological security factors in Yuexi county表1 岳西县生态安全因子等级划分 |
评价因子 | 序号 | 分级参考 来源 | 单位 | 阻力值 | 权重 | |||
---|---|---|---|---|---|---|---|---|
1级 | 2级 | 3级 | 4级 | |||||
高程 | A | 文献[24] | m | <200 | 200~400 | 400~600 | >600 | 0.150 |
坡度 | B | 文献[26] | ° | <7 | 7~15 | 15~25 | >25 | 0.200 |
土地利用类型 | C | 文献[23] | — | 林地 | 水域 | 农用地 | 建设用地 | 0.050 |
植被覆盖度 | D | 文献[27] | — | >65% | 50%~65% | 35%~50% | <35% | 0.150 |
土壤侵蚀 | E | 文献[28] | t·km-2·a-1 | <2500 | 2500~5000 | 5000~10000 | >10000 | 0.050 |
距景点距离 | F | 文献[24,29] | m | <1000 | 1000~5000 | >5000 | 0.005 | |
距工业用地距离 | G | 文献[22] | m | >1500 | 1000~1500 | 500~1000 | <500 | 0.045 |
距水体距离 | H | 文献[25] | m | <100 | 100~500 | 500~1000 | >1000 | 0.200 |
距道路距离 | I | 文献[30] | m | >2000 | 1000~2000 | 500~1000 | <500 | 0.100 |
距居民点距离 | J | 文献[22,30] | m | >1500 | 1000~1500 | 500~1000 | <500 | 0.050 |
Fig. 2 Grade distribution of reclassification maps of ecological security factors in Yuexi county图2 岳西县生态安全阻力因子重分类等级图|||注:A:高程因子;B:坡度因子;C:土地利用类型因子;D:植被覆盖度因子;E:土壤侵蚀因子;F:距景点距离因子;G:距工业用地距离因子;H:距水体距离因子;I:距道路距离因子;J:距居民点距离因子。 |
Fig. 3 Grid map of ecological resistance in Yuexi county图3 岳西县生态栅格阻力面 |
Fig. 4 Classification of ecological security in Yuexi county图4 岳西县生态安全等级划分 |
Fig. 5 The LISA aggregation of land ecological security evaluation index in Yuexi county图5 岳西县生态安全评价等级Moran's I散点图及LISA聚集图 |
Fig. 6 Grid map of cumulative cost distance for ecological sources and potential eco-corridors and eco-nodes图6 累积耗费阻力面、潜在生态廊道与节点分布 |
Table 2 Identification of the importance of potential ecological corridors in Yuexi county表2 岳西县潜在生态廊道重要性识别 |
重要 性值 | 生态源斑块 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||
生态源斑块 | 1 | — | 220.7892 | 96.5339 | 57.4688 | 31.7698 | 47.9108 | 32.7094 | 58.6744 | 44.8643 | 29.8911 |
2 | — | — | 775.7783 | 200.6901 | 70.7435 | 118.2498 | 49.2884 | 30.1409 | 28.1914 | 20.4705 | |
3 | — | — | — | 600.5939 | 123.3771 | 267.0343 | 58.9505 | 22.0793 | 22.0166 | 18.0512 | |
4 | — | — | — | — | 388.4055 | 522.7442 | 64.3838 | 16.1716 | 16.1476 | 14.0607 | |
5 | — | — | — | — | — | 214.0658 | 58.4684 | 11.4995 | 11.4219 | 11.1292 | |
6 | — | — | — | — | — | — | 165.3681 | 19.9354 | 20.5207 | 19.0215 | |
7 | — | — | — | — | — | — | — | 15.1764 | 18.7530 | 21.8282 | |
8 | — | — | — | — | — | — | — | — | 203.1091 | 65.0220 | |
9 | — | — | — | — | — | — | — | — | — | 274.5304 | |
10 | — | — | — | — | — | — | — | — | — | — |
注:(1)表中1~10数值表示各生态源斑块的序号,按顺序分别表示:1为“鹞落坪自然保护区”、2为“驮尖风景区”、3为“明堂山风景区”、4为“天峡风景区”、5为“司空山风景区”、6为“妙道山风景区”、7为“天仙河景区”、8为“云峰峡谷景区”、9为“乐诚寺旅游景区”、10为“枯井园自然保护区”;(2)表中重要性值在 [50,100] 区间的为二级廊道,大于100的为一级廊道,重要性小于50的为一般廊道。 |
Fig. 7 The map of ecological framework with layout of 'patch-corridor-point' in Yuexi county图7 岳西县生态网络框架空间布局 |
The authors have declared that no competing interests exist.
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