Assessing the ecological security of the Tibetan plateau: Methodology and a case study for Lhaze County

Zhao, Yawen; Zou, Xueyong; Cheng, Hong; Jia, Huicong; Wu, Yue; Wang, Gui-Yong; Zhang, Chunlai; Gao, Shangyu

doi:10.1016/j.jenvman.2005.08.019

Cited by 130 publications

(56 citation statements)

References 13 publications

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“…Moreover, we assess ecological security at the landscape scale rather than at the national or regional scale [28,75,76]. Additionally, rather than using a single landscape fragmentation indicator [77,78] or complex but ineffective socioeconomic statistical indicators that are spatially averaged [79,80], we develop a holistic indicator system using the P-S-R framework to evaluate ecological security based on landscape theory and spatial analysis. Various elements, including construction land development, population density change, and the implementation of eco-function zoning are included in our evaluation system to emphasize the dominant effects of human activities in urban areas.…”

Section: The Integrated Methods Of Ecological Security Evaluationmentioning

confidence: 99%

Integrating Future Land Use Scenarios to Evaluate the Spatio-Temporal Dynamics of Landscape Ecological Security

Wang

Xie

et al. 2016

Sustainability

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Abstract:Urban ecological security is the basic principle of national ecological security. However, analyses of the spatial and temporal dynamics of ecological security remain limited, especially those that consider different scenarios of urban development. In this study, an integrated method is proposed that combines the Conversion of Land Use and its Effects (CLUE-S) model with the Pressure-State-Response (P-S-R) framework to assess landscape ecological security (LES) in Huangshan City, China under two scenarios. Our results suggest the following conclusions: (1) the spatial and temporal dynamics of ecological security are closely related to the urbanization process; (2) although the average values of landscape ecological security are similar under different scenarios, the areas of relatively high security levels vary considerably; and (3) spatial heterogeneity in ecological security exists between different districts and counties, and the city center and its vicinity may face relatively serious declines in ecological security in the future. Overall, the proposed method not only illustrates the spatio-temporal dynamics of landscape ecological security under different scenarios but also reveals the anthropogenic effects on ecosystems by differentiating between causes, effects, and human responses at the landscape scale. This information is of great significance to decision-makers for future urban planning and management.

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Section: The Integrated Methods Of Ecological Security Evaluationmentioning

confidence: 99%

Integrating Future Land Use Scenarios to Evaluate the Spatio-Temporal Dynamics of Landscape Ecological Security

Wang

Xie

et al. 2016

Sustainability

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“…We selected indices by considering the integrity, simplicity, dynamic response, accuracy and availability of the data [35]. Landscape indices are widely used in the study of spatial landscape patterns and landscape ecology [36].…”

Section: The Selected Indicesmentioning

confidence: 99%

Characterizing Factors Associated with Built-Up Land Expansion in Urban and Non-Urban Areas from a Morphological Perspective

Zhang

Xiao

et al. 2017

Sustainability

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Abstract:In this paper, built-up land expansion patterns and the associated factors were characterized in urban and non-urban areas across the Wen-Tai region of eastern China. Fractal dimension can be used as a reliable indicator of the complexity of built-up land form, and the increasing trend of fractal dimension indicated a more complex, dispersed pattern of built-up land in urban areas. Spatial regression models were quantitatively implemented to identify the indicators influencing the variation of fractal dimensions. Our findings suggested that the fractal dimension of built-up land forms was positively correlated to the patch density and elevation when built-up land expansion was more concentrated. Both landscape shape index and Gross Domestic Product (GDP) were positively correlated with fractal dimension in urban areas, and total edge, edge density, and connective index had impacts on fractal dimension in non-urban areas. Slope and agricultural population also showed an influence on fractal dimension. This study provided a new way for urban studies in interpreting the complex interactions between fractal dimension and related factors. The combined approach of fractal dimension and spatial analysis can provide the government planners with valuable information that can be efficiently used to realize the influences of land use policies in urban and non-urban areas.

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“…Ecological security is a concept that was fi rst proposed by the United States government [1]. Eco-security early warning systems are an important part of eco-security, and predictability is a characteristic feature of eco-security early warning.…”

Section: Introductionmentioning

confidence: 99%

“…However, mountain eco-security early warning research is very limited overseas, and domestically the common research topic is mountain city ecological security evaluation [1,37], mountain hazards monitoring and management [38][39][40], the sustainable development of mountain social ecosystems [41][42], mountain grassland characteristics and threats research [43][44], mountain forest ecosystem species distribution and composition, disaster prevention and management research [45][46][47][48], and mountain soil research [49], etc.…”

Section: Introductionmentioning

confidence: 99%

Plateau Mountain Eco-Security Early Warning Research

Ma¹,

Zhang²,

Yang³

et al. 2016

Pol. J. Environ. Stud.

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At present, overseas and domestic eco-security early warning research is in the exploratory stage. This paper uses Kizilsu Kirghiz Autonomous Prefecture as the research object and constructs an evaluation index system based on the pressure-state-response (P-S-R) conceptual model. This study analyzes eco-security early warning in the study area using the granger causality test model, the entropy weight method, and the matter-element model, and analyzes the present eco-security situation and future development trends in the study area. The author hopes that this study can further enrich eco-security early warning research and provide a scientifi c reference for ecological security in the study area. The specifi c research results were as follows: 1) This article evaluated the plateau mountain ecological security early warning system, and the application of the Granger causality test was further implemented with targeted and objective index system selection, achieving a one-to-one analysis in the results and further enriching the research theory of the importance of eco-security early warning systems. 2) On the whole, the eco-security situation in the study area is gradually moving in a positive direction, but the low level of overall eco-security continues to cause great pressure. 3) From 2005 to 2014, the study area gradually attached greater importance to the construction of ecosecurity, but the overall eco-security level is low, and the overall eco-security regulation capacity is insuffi cient. 4) The key eco-security pressure in the study area mainly derives from industrial and agricultural development, although the control power is gradually increasing, but the control effect is not obvious, and the contradiction between ecological security and socio-economic development is still very obvious. 5) The study area is a typical earthquake-prone area, and fi nancial input into the governance of natural geological disasters due to the high frequency of earthquakes is gradually increasing; but the study area still needs to increase its investments.

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Assessing the ecological security of the Tibetan plateau: Methodology and a case study for Lhaze County

Cited by 130 publications

References 13 publications

Integrating Future Land Use Scenarios to Evaluate the Spatio-Temporal Dynamics of Landscape Ecological Security

Integrating Future Land Use Scenarios to Evaluate the Spatio-Temporal Dynamics of Landscape Ecological Security

Characterizing Factors Associated with Built-Up Land Expansion in Urban and Non-Urban Areas from a Morphological Perspective

Plateau Mountain Eco-Security Early Warning Research

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