| 引用本文: | 刘梦园,丁文广,王龙,王亚丽.2025.基于InVEST模型的1990—2020年河西地区生境质量时空演变分析[J].地球环境学报,16(2):220-233 |
| LIU Mengyuan,DING Wenguang,WANG Long,WANG Yali.2025.Spatial-temporal evolution of habitat quality in Hexi region from 1990 to 2020 based on InVEST model[J].Journal of Earth Environment,16(2):220-233 |
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| 摘要: |
| 基于1990、2000、2010及2020年4期土地利用数据，运用InVEST模型分析河西地区1990—2020年生境质量时空分布特征及变化规律，并根据生境质量空间格局和生境质量转移变化结果对河西五市的生态环境进行评价排序。结果表明：1990—2020年，河西地区平均生境质量指数为0.2231，呈现“东高西低、南高北低”的空间分布特征，五市生境质量水平从高到低排序为：张掖市＞武威市＞金昌市＞嘉峪关市＞酒泉市；30 a间河西地区生境质量等级增加区域比例为3.02%，生境质量等级降低区域比例为2.79%，五市生境质量等级变化趋势从好到坏排序为：武威市＞酒泉市＞张掖市＞嘉峪关市＞金昌市。研究结果可为河西地区生态安全格局构建和生态系统服务功能优化提供科学支持和实践参考。 |
| 关键词: 生境质量 InVEST模型 河西地区 时空演变 |
| DOI：10.7515/JEE222096 |
| CSTR：32259.14.JEE222096 |
| 分类号: |
| 基金项目:国家重点研发计划（2019YFC0507450）；中国科学院战略性先导科技专项（A类）（XDA20100102） |
| 英文基金项目:National Key Research and Development Program of China (2019YFC0507450); Strategic Priority Research Program of the Chinese Academy of Sciences (XDA20100102) |
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| Spatial-temporal evolution of habitat quality in Hexi region from 1990 to 2020 based on InVEST model |
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LIU Mengyuan, DING Wenguang*, WANG Long, WANG Yali
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Key Laboratory of Western China’s Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
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| Abstract: |
| Background, aim, and scope Habitat quality reflects both biodiversity and ecosystem services. In recent years, rapid urban and population expansion have led to ecological pressure such as destruction of natural habitat integrity. The Hexi region, which is a typical ecologically fragile area, urgently requires coordinated socio-ecological development. This paper analyses the patterns of spatial and temporal habitat distribution and changes of habitat quality in this area. The results help construct the ecological security pattern and optimize the ecosystem service in the region. Materials and methods By reference to the land use data of Chinese Academy of Sciences from 1990 to 2020, InVEST model is used to analyze the spatial and temporal habit distribution and changes of habitat quality in Hexi region, followed by identification of cold hotspot areas of habitat quality with spatial statistical method. Results In 1990, 2000, 2010 and 2020, the mean habitat quality index in Hexi region was 0.2220, 02220, 0.2235 and 0.2248, respectively. In terms of spatial distribution, the habitat quality was “high in the east and south, and low in the west and north”. From 1990 to 2020, the proportion of areas with elevated habitat quality grade was 3.02%, and the proportion of areas with lowered habitat quality grade was 2.79%. Discussion From 1990 to 2020, land use change in Hexi region was significantly affected by human activities, with the most drastic and frequent transfer changes found along Hexi Corridor City Belt. Accelerated urbanization resulted in increased area with source of threat such as cultivated land and construction land. In addition, suitable habitats such as grassland and woodland were degraded. These changes negatively impacted habitat quality. The overall habitat quality in Hexi region was low, and areas with high habitat quality were concentrated in the vicinity of Qilian Mountains. Affected by harsh natural conditions, the western Hexi region had lower habitat quality than the eastern part, where grassland and woodland degradation and desertification were the most negative factors. Due to dense habitat threatening sources, the habitat quality of eastern Hexi region was severely restricted, and ecological laws should be followed in developing and using land resources. Conclusions The ranking of habitat quality from high to low is Zhangye＞Wuwei＞Jinchang＞Jiayuguan＞Jiuquan, and the ranking of improvement of habitat quality rating is Wuwei＞Jiuquan＞Zhangye＞Jiayuguan＞Jinchang. Recommendations and perspectives The overall habitat quality of Hexi region is low, but exhibited a satisfactory improvement trend. It is recommended that the relevant departments should follow the ecological law in the development and utilization of land resources, and the Qilian Mountain region should be under key ecological protection area. |
| Key words: habitat quality InVEST model Hexi region temporal and spatial changes |
