Jangho Architecture College, Northeastern University, Shenyang, Liaoning Province, China.
PLoS One. 2022 Feb 7;17(2):e0263601. doi: 10.1371/journal.pone.0263601. eCollection 2022.
Biocapacity of a region exhibits spatial differences owing to the limitations of regional scale and natural conditions. Based on the multi-scale perspective, we comprehensively studied and analyzed the temporal and spatial differences of the biocapacity of a region in an attempt to establish the groundwork for optimizing urban development and its utilization framework. By adopting the ecological footprint model along with multi-scale difference evaluation method, the municipal and county scales are incorporated into a unified analysis framework in this paper, thereby facilitating the exploration of the temporal and spatial differences in the biocapacity of Shenyang-a city in China-from 2005 to 2019. The results demonstrated that: 1) At the municipal scale, the biocapacity per capita fluctuated between 1.35 hm2/person and 2.22 hm2/person. It revealed an "up-down-up" trend, which appeared consistent with the Kuznets cycle; at the county scale, the biocapacity depicted spatial differences, while those of downtown and surrounding districts/counties developed a two-level ascending hierarchical structure. 2) The time series of footprint size and depth first ascended and then declined, and can be classified into four types: closed type, inverted U-type, S-type, and M-type. Among them, S-type and M-type have the phenomenon of over-utilizing the stock capital. 3) For a long time, the regional difference of biocapacity has mostly dwelt on two scales with an evident scale effect, and the biocapacity of Liaozhong District was the worst.
区域生物承载力因区域尺度和自然条件的限制而存在空间差异。基于多尺度视角，我们综合研究和分析了区域生物承载力的时空差异，试图为优化城市发展及其利用框架奠定基础。本文采用生态足迹模型和多尺度差异评价方法，将市级和县（市）级纳入统一的分析框架，探讨了中国沈阳市 2005 年至 2019 年生物承载力的时空差异。结果表明：1）在市级尺度上，人均生物承载力在 1.35 hm2/人和 2.22 hm2/人之间波动，呈现出“先降后升”的趋势，与库兹涅茨曲线一致；在县级尺度上，生物承载力存在空间差异，而市中心区和周边区县则呈现出两级上升的层次结构。2）足迹大小和深度的时间序列呈先升后降的趋势，可分为四类：封闭型、倒 U 型、S 型和 M 型。其中，S 型和 M 型存在过度利用存量资本的现象。3）长期以来，生物承载力的区域差异主要集中在两个尺度上，存在明显的尺度效应，辽中区的生物承载力最差。
