Optimization of ecological node layout and stability analysis of ecological network in desert oasis：a typical case study of ecological fragile zone located at Deng Kou County(Inner Mongolia)

Yu, Qiang; Yue, Depeng; Wang, Yuhang; Su, Kai; Fang, Minzhe; Ma, Hui; Zhang, Qinbin; Huang, Yu‐An

doi:10.1016/j.ecolind.2017.09.002

Cited by 118 publications

(54 citation statements)

References 44 publications

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“…In this paper, based on the curve of minimum cumulative resistance and area, the resistance threshold is used as the grading boundary, and the buffer zones of high, medium, and low ecological security patterns are obtained. Ecological nodes, as the key ecological strategic points for the interconnection between “sources”, are spatially reflected as the intersection points of the equal resistance lines between the ecological corridors and the minimum cumulative resistance surface, as well as the points where two or more ecological corridors intersect [47]. They are turning points for the change of material quantity and movement speed in the ecological network, and they are also the turning points for maintaining the sustainable development of ecological functions and controlling the ecology security [48].…”

Section: Methodologiesmentioning

confidence: 99%

The Construction and Optimization of Ecological Security Pattern in the Harbin-Changchun Urban Agglomeration, China

Guo

Liu

et al. 2019

IJERPH

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Urban agglomerations have become a new geographical unit in China, breaking the administrative fortresses between cities, which means that the population and economic activities between cities will become more intensive in the future. Constructing and optimizing the ecological security pattern of urban agglomerations is important for promoting harmonious social-economic development and ecological protection. Using the Harbin-Changchun urban agglomeration as a case study, we have identified ecological sources based on the evaluation of ecosystem functions. Based on the resistance surface modified by nighttime light (NTL) data, the potential ecological corridors were identified using the least-cost path method, and key ecological corridors were extracted using the gravity model. By combining 15 ecological sources, 119 corridors, 3 buffer zones, and 77 ecological nodes, the ecological security pattern (ESP) was constructed. The main land-use types composed of ecological sources and corridors are forest land, cultivated land, grassland, and water areas. Some ecological sources are occupied by construction, while unused land has the potential for ecological development. The ecological corridors in the central region are distributed circularly and extend to southeast side in the form of tree branches with the Songhua River as the central axis. Finally, this study proposes an optimizing pattern with "four belts, four zones, one axis, nine corridors, ten clusters and multi-centers" to provide decision makers with spatial strategies with respect to the conflicts between urban development and ecological protection during rapid urbanization.

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Section: Methodologiesmentioning

confidence: 99%

The Construction and Optimization of Ecological Security Pattern in the Harbin-Changchun Urban Agglomeration, China

Guo

Liu

et al. 2019

IJERPH

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“…Our approach tries to develop a new dimension of environmental fragility, taking into consideration the high complexity of the internal and external environments of a territorial system, and including both natural and anthropogenic components. This is a complementary approach by comparison with other uses of the fragile/ fragility concept, developed by different authors, which reflect more or less the connection with a diversity of territorial policies (Petrosillo et al, 2006;Baliamoune-Lutz and McGillivray, 2008;Ferreira, 2017;Yu et al, 2018). Each territorial system is not isolated, having structural and functional relationships with surrounding territorial systems.…”

Section: The Fragile Environment Conceptmentioning

confidence: 99%

Assessing environmental fragility in a mining areafor specific spatial planning purposes

Cocheci

Ianoş

Sârbu

et al. 2019

Moravian Geographical Reports

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Environmental fragility in a mining area is evaluated both in terms of its biophysical (natural) and socio-economic components and their anthropogenic interactions. We identified multiple criteria and indicators for this task, but then reduced these according to responses given by 60 experts in domains related to spatial planning. We used the selected criteria and indicators to develop environment fragility indices for each territorial administrative unit (LAU2) in Gorj County in south-western Romania. The resulting indices reveal quite large spatial variations in fragility and evidence that highly fragile human and physical environments are to some extent intertwined. In this respect, such environmental components as climate, soils, ecosystems, natural hazards and economic issues provide constraints on human activities, whilst humans themselves can, without sufficient care, increase fragility and adversely affect the quality of living environments for present and future generations. We also explore how such estimates of natural and anthropogenic fragility might enable better specific planning for local and regional development that aims to ameliorate both environmental and human adversity in an integrated way.

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“…Under the background of rapid urbanization, excessive utilization and development of urban resources and environment lead to deterioration of the regional ecological environment and obstruction of ecosystem service function, which seriously affects regional landscape pattern and sustainable development [ 1 , 2 , 3 , 4 ]. With urban sustainable development as the goal, ecological network optimization applies certain techniques and methods to combine landscape structure, ecological process, and ecological function to layout various landscape elements in the region, obtain a multi-objective, multi-level and multi-category landscape spatial network composed of points, lines and planes [ 5 , 6 , 7 ]. Optimization of the urban ecological network is an important means to stabilize the ecosystem, strengthen the association and interaction among natural patches, maintain the normal play of ecosystem service functions, and enhance the natural carrying capacity [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Ecological Network Optimization in Urban Central District Based on Complex Network Theory: A Case Study with the Urban Central District of Harbin

Song

et al. 2021

IJERPH

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Habitat destruction and declining ecosystem service levels caused by urban expansion have led to increased ecological risks in cities, and ecological network optimization has become the main way to resolve this contradiction. Here, we used landscape patterns, meteorological and hydrological data as data sources, applied the complex network theory, landscape ecology, and spatial analysis technology, a quantitative analysis of the current state of landscape pattern characteristics in the central district of Harbin was conducted. The minimum cumulative resistance was used to extract the ecological network of the study area. Optimized the ecological network by edge-adding of the complex network theory, compared the optimizing effects of different edge-adding strategies by using robustness analysis, and put forward an effective way to optimize the ecological network of the study area. The results demonstrate that: The ecological patches of Daowai, Xiangfang, Nangang, and other old districts in the study area are small in size, fewer in number, strongly fragmented, with a single external morphology, and high internal porosity. While the ecological patches in the new districts of Songbei, Hulan, and Acheng have a relatively good foundation. And ecological network connectivity in the study area is generally poor, the ecological corridors are relatively sparse and scattered, the connections between various ecological sources of the corridors are not close. Comparing different edge-adding strategies of complex network theory, the low-degree-first strategy has the most outstanding performance in the robustness test. The low-degree-first strategy was used to optimize the ecological network of the study area, 43 ecological corridors are added. After the optimization, the large and the small ecological corridors are evenly distributed to form a complete network, the optimized ecological network will be significantly more connected, resilient, and resistant to interference, the ecological flow transmission will be more efficient.

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Optimization of ecological node layout and stability analysis of ecological network in desert oasis：a typical case study of ecological fragile zone located at Deng Kou County(Inner Mongolia)

Cited by 118 publications

References 44 publications

The Construction and Optimization of Ecological Security Pattern in the Harbin-Changchun Urban Agglomeration, China

The Construction and Optimization of Ecological Security Pattern in the Harbin-Changchun Urban Agglomeration, China

Assessing environmental fragility in a mining areafor specific spatial planning purposes

Ecological Network Optimization in Urban Central District Based on Complex Network Theory: A Case Study with the Urban Central District of Harbin

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