Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model
Ecological environment in the arid areas of Northwest China is very vulnerable. Ecological vulnerability is considered to be one of the important indicators to measure the status and evolutions of the regional ecological environment and has become a key measure in the study of ecological change. How...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Ecological Indicators |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X21010633 |
| _version_ | 1798026720933052416 |
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| author | Xingran Cai Zhongqin Li Yanqing Liang |
| author_facet | Xingran Cai Zhongqin Li Yanqing Liang |
| author_sort | Xingran Cai |
| collection | DOAJ |
| description | Ecological environment in the arid areas of Northwest China is very vulnerable. Ecological vulnerability is considered to be one of the important indicators to measure the status and evolutions of the regional ecological environment and has become a key measure in the study of ecological change. However, studies on the ecological vulnerability in the whole arid areas of Northwest China on the county scale are currently sparse. Here, according to vegetation, land use type, topography, climate and socio-economic data, we present the spatial and temporal evolution of ecological vulnerability in the arid areas of Northwest China over the period 2000–2018 by structuring a “pressure (P)-sensitivity (S)-restoration (R)” ecological vulnerability evaluation index system and using an ordered weighted average (OWA) model. Our results suggested that the overall ecological vulnerability in the arid areas of Northwest China was dominated by the severe level from 2000 to 2018 with an average multi-year ecological vulnerability index of 0.48, which appeared a slight downward trend with the implementation of ecological restoration measures. Ecological vulnerability exhibited a significant “stepped” differentiation feature, and the eastern and western regions were markedly lower than that of the central region. Gravity center of the ecological vulnerability index has a significant spatial difference, which developed in the shape of “Z” direction between Heshuo county and Tuokexun county. Our study revealed the dynamic changes of ecological vulnerability at the county scale and provided decision-making information for the formulation of targeted ecological vulnerability management measures. Under the background of climate change and the new normal of social economy, the dynamic monitoring of ecological vulnerability and effective identification of vulnerability factors still require in-depth research. |
| first_indexed | 2024-04-11T18:39:55Z |
| format | Article |
| id | doaj.art-8c91b68b00ea455ab2071cb4d201ac8d |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-04-11T18:39:55Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-8c91b68b00ea455ab2071cb4d201ac8d2022-12-22T04:09:02ZengElsevierEcological Indicators1470-160X2021-12-01133108398Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average modelXingran Cai0Zhongqin Li1Yanqing Liang2State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaState Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Corresponding author.School of Geographical Sciences, Hebei Normal University, Shijiazhuang 050024, China; Hebei Technology Innovation Center for Remote Sensing Identification of Environmental Change, School of Geographical Sciences, Shijiazhuang 050024, ChinaEcological environment in the arid areas of Northwest China is very vulnerable. Ecological vulnerability is considered to be one of the important indicators to measure the status and evolutions of the regional ecological environment and has become a key measure in the study of ecological change. However, studies on the ecological vulnerability in the whole arid areas of Northwest China on the county scale are currently sparse. Here, according to vegetation, land use type, topography, climate and socio-economic data, we present the spatial and temporal evolution of ecological vulnerability in the arid areas of Northwest China over the period 2000–2018 by structuring a “pressure (P)-sensitivity (S)-restoration (R)” ecological vulnerability evaluation index system and using an ordered weighted average (OWA) model. Our results suggested that the overall ecological vulnerability in the arid areas of Northwest China was dominated by the severe level from 2000 to 2018 with an average multi-year ecological vulnerability index of 0.48, which appeared a slight downward trend with the implementation of ecological restoration measures. Ecological vulnerability exhibited a significant “stepped” differentiation feature, and the eastern and western regions were markedly lower than that of the central region. Gravity center of the ecological vulnerability index has a significant spatial difference, which developed in the shape of “Z” direction between Heshuo county and Tuokexun county. Our study revealed the dynamic changes of ecological vulnerability at the county scale and provided decision-making information for the formulation of targeted ecological vulnerability management measures. Under the background of climate change and the new normal of social economy, the dynamic monitoring of ecological vulnerability and effective identification of vulnerability factors still require in-depth research.http://www.sciencedirect.com/science/article/pii/S1470160X21010633Ecological vulnerabilityOrdered weighted average (OWA)Spatiotemporal patternThe arid areas of Northwest China |
| spellingShingle | Xingran Cai Zhongqin Li Yanqing Liang Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model Ecological Indicators Ecological vulnerability Ordered weighted average (OWA) Spatiotemporal pattern The arid areas of Northwest China |
| title | Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| title_full | Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| title_fullStr | Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| title_full_unstemmed | Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| title_short | Tempo-spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| title_sort | tempo spatial changes of ecological vulnerability in the arid area based on ordered weighted average model |
| topic | Ecological vulnerability Ordered weighted average (OWA) Spatiotemporal pattern The arid areas of Northwest China |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X21010633 |
| work_keys_str_mv | AT xingrancai tempospatialchangesofecologicalvulnerabilityinthearidareabasedonorderedweightedaveragemodel AT zhongqinli tempospatialchangesofecologicalvulnerabilityinthearidareabasedonorderedweightedaveragemodel AT yanqingliang tempospatialchangesofecologicalvulnerabilityinthearidareabasedonorderedweightedaveragemodel |