人类活动对生境质量的影响及空间关系定量分析以石家庄为例

Quantitative analysis of the impact of human activities on habitat quality and their spatial relationship: Shijiazhuang as an example

  • 摘要: 定量分析并揭示人类活动对生境质量的影响及相关关系,可为区域生态环境的治理及修复提供科学依据。以石家庄为例,基于2010年、2015年、2021年遥感影像解译土地利用结果,利用InVEST模型评估石家庄生境质量的时空演变,结合土地利用、夜间灯光、人口密度数据构建人类活动强度指标,运用双变量空间自相关和多尺度地理加权回归模型分析人类活动与生境质量的空间相关性及其对生境质量的影响。结果表明:2010—2021年,研究区的人类活动强度变化较小,整体处于较低水平,总体为增长趋势,空间上呈西低东高分布;研究区的生境质量平均值处于中等级,呈V型波动,先减小后增加,且呈西部高、中部及东部低的分布特征;人类活动对生境质量的影响存在显著空间异质性,整体以负相关为主且影响程度减弱,在河流沿线及局部山区呈正相关。未来石家庄生态环境保护及修复措施需要考虑人类活动强度与生境质量间的空间相关性,将中东部地区作为重点,控制建设用地发展,保护基本农田,加强滹沱河沿线生态修复,以提高生境质量。

     

    Abstract: Quantitative analysis and revealing of the impact and the correlation of human activities on habitat quality can provide a scientific basis for the management and restoration of the regional eco-environment. Taking Shijiazhuang City as a case study, the temporal and spatial evolution of habitat quality was evaluated by InVEST model based on land use results from remote sensing images of 2010, 2015 and 2021. The spatial correlation between human activities and habitat quality and the impact of human activities on habitat quality were analyzed by bivariate spatial autocorrelation and multiscale geographically weighted regression (MGWR) models, and the human activity intensity index was constructed in combination with the land use, night light and population density data. The results showed that from 2010 to 2021, the human activity intensity in the study area was generally at a stable lower level, showing an increasing trend, with a spatial distribution of low in the western parts and high in the eastern parts. The average value of habitat quality was in the medium level, with a "V" type fluctuation, decreasing first and then increasing. In the spatial distribution, habitat quality level was high in the west and low in the central and eastern parts. There was a significant spatial heterogeneity in the impact of human activity on habitat quality, with a predominantly negative correlation and a decreasing impact, while a positive correlation appeared along rivers and in parts of mountain areas. It was suggested that the spatial correlation between human activity intensity and habitat quality should be considered for eco-environment protection and restoration measures in Shijiazhuang, focusing on the areas in the east-central parts. The measures included controlling the expansion of construction land, protecting basic farmland, and strengthening the ecological restoration along the Hutuo River to improve the habitat quality.

     

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