| 呼和浩特市生境质量对城市用地扩展的时空响应 |
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| 引用本文： | 冯琰玮,甄江红,马晨阳.呼和浩特市生境质量对城市用地扩展的时空响应[J].干旱区地理,2020,43(4):1014-1022. |
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| 作者姓名： | 冯琰玮 甄江红 马晨阳 |
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| 作者单位： | 内蒙古师范大学地理科学学院,内蒙古 呼和浩特 010022 |
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| 基金项目： | 国家自然科学基金项目（41761032; 41261109）; 内蒙古自然科学基金项目（2016MS0410）资助 |
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| 摘 要： | 以呼和浩特市为研究区,采用梯度分析法,结合InVEST模型,在评价研究区近27 a城市用地扩展及生境质量演变的基础上,运用双变量空间自相关剖析生境质量对城市用地扩展的时空响应。结果表明：（1） 研究时段内,城市扩展表现为核心区的低密度扩张及外围区的多点扩散,紧凑度不断下降,城市结构不稳定,扩展模式不尽合理。（2） 生境平均值从0.49下降到0.44,质量等级跌至较差水平。低等级生境主要呈圈层向南部、东南部扩散,与建设用地扩展方向基本一致。（3） 建设用地扩展强度与生境质量变化空间分布呈负相关关系,核心外围区的建设用地扩展始终为变化最强烈的地带,生境质量退化也最为剧烈。（4） 斑块密度不断上升,特别是建设用地斑块的增加使得城市景观格局愈发破碎。
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| 关 键 词： | 新型城镇化 生境质量 城市用地扩展 InVEST模型 呼和浩特市 |
| 收稿时间： | 2019-09-07 |
Spatiotemporal response of habitat quality to urban expansion in Hohhot City |
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| FENG Yan-wei,ZHEN Jiang-hong,MA Chen-yang.Spatiotemporal response of habitat quality to urban expansion in Hohhot City[J].Arid Land Geography,2020,43(4):1014-1022. |
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| Authors: | FENG Yan-wei ZHEN Jiang-hong MA Chen-yang |
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| Institution: | College of Geography Science,Inner Mongolia Normal University,Hohhot 010022,Inner Mongolia,China |
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| Abstract: | This paper evaluated the evolution of urban expansion and habitat quality in the Hohhot City,Inner Mongolia,China from 1990 to 2017 using gradient analysis and an InVEST model. A bivariate spatial auto-correlation was employed to ascertain the impact of urban expansion on habitat quality. The results showed that urban expansion during the period was characterized by low-density expansion in core areas and multi-point diffusion in periphery areas. The urban areas became less compact and stable,exhibiting uneven development. Secondly,the average habitat value decreased from 0.49 to 0.44,and the quality dropped to a worse level. Low-grade habitats primarily diffused to the south and southeast in a circular layer,which is consistent with the direction of construction expansion. Thirdly,there was a negative spatial correlation between the change in urban expansion and habitat quality. This is because urban expansion in the core-periphery areas remains the most intense changing zones where habitat quality degradation happen. In addition,there is a rising trend in the density of patches and an increasing use of patches during construction,which have aggravated the fragmented urban landscape. |
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| Keywords: | new urbanization habitat quality urban expansion InVEST model Hohhot City |
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