基于电路理论的生态安全格局时空演变与影响因素研究——以陕北黄土高原为例

doi:10.12118/j.issn.1000-6060.2024.199

Abstract

Abstract:

Identifying landscape elements such as points, lines, and planes that are critical for maintaining regional ecosystems is essential for constructing dynamic ecological security patterns and understanding their influencing factors. Addressing the limitations of previous studies, this research employs morphological spatial pattern analysis (MSPA), landscape connectivity analysis, and circuit theory models to construct ecological security patterns on the Loess Plateau in northern Shaanxi Province, China, from 2000 to 2020. It investigates the temporal and spatial evolution of these patterns and uses geographical detectors, ordinary least squares (OLS), and geographically weighted regression (GWR) models to analyze the spatial heterogeneity of influencing factors, offering ecological restoration strategies. The results showed that: (1) From 2000 to 2020, ecological sources were concentrated in the southern Loess Plateau of northern Shaanxi, with minimal changes in area and stable spatial locations. (2) The mean ecological resistance surface values on the Loess Plateau in northern Shaanxi in 2000, 2010, and 2020 were 4.96, 4.36, and 4.40, respectively, showing a pattern of low resistance in the south region and high resistance in the northwest region. (3) Ecological corridor lengths on the Loess Plateau in northern Shaanxi were 2416.25 km, 3433.61 km, and 2643.62 km in 2000, 2010, and 2020, respectively. Southern regions exhibited dense, low-resistance corridors, while northern regions had sparse, high-resistance corridors. (4) Ecological pinch points and barriers were mainly located in the northwest of the Loess Plateau in northern Shaanxi, with their areas consistently decreasing over time. (5) Vegetation coverage, landscape diversity, population density, slope, and precipitation were the primary factors influencing the spatial heterogeneity of the ecological security pattern. These findings provide a scientific basis for ecological planning on the Loess Plateau in northern Shaanxi, aiding in the development and adjustment of ecological restoration strategies.

Key words: ecological security pattern, temporal and spatial evolution, influencing factors, circuit theory, the Loess Plateau of northern Shaanxi

ZHANG Jie, QU Jianjun, CHEN Hai, SHI Jinxin, MA Yuhe, LIU Di. Spatial and temporal evolution and influencing factors of ecological security pattern based on circuit theory: A case of Loess Plateau in northern Shaanxi[J].Arid Land Geography, 2025, 48(3): 494-505.

Figures/Tables 11

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References 43

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年份	生态夹点		生态障碍点
年份	数量/个	面积/km²	数量/个	面积/km²
2000	83	395.23	70	281.91
2010	44	250.22	42	132.71
2020	56	207.12	19	33.89

变量	系数	标准误	P值	VIF
高程	0.064	0.153	0.675	4.22
气温	-1.159	0.121	0.194	4.03
NDVI	0.263	0.082	0.005	2.28
夜间灯光强度	-0.295	0.207	0.157	1.53
人口密度	0.395	1.627	0.809	1.58
SHEI	-0.298	0.060	0.000	1.43

变量	系数	标准误	P值	VIF
坡度	-0.289	0.018	0.000	1.46
降水	-0.117	0.014	0.000	2.37
NDVI	-0.032	0.015	0.040	2.47
人口密度	0.900	0.326	0.000	1.10

模型	AICc	R²	R² adjusted
GWR	-1154.333	0.869	0.863
OLS	-1113.966	0.843	0.841

Spatial and temporal evolution and influencing factors of ecological security pattern based on circuit theory: A case of Loess Plateau in northern Shaanxi

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