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With the rapid development of urbanization in the semiarid northern areas of China, urban ecological imbalances, the heat island effect are becoming increasingly severe. Before we calculate the carbon benefit in landscape, we must first understand the process of carbon sequestration this research provided a new experimental method with both ornamental and experimental value for a small-scale urban space. Taking the practice project of the Baima River Park bioretention facilities as an example, this study summarized the optimization model of ground cover plant allocation and soil remediation, providing a theoretical basis for the low-impact development and construction of urban green spaces. We applied a new technique and plant community to transform plant carbon fixation, and the results showed that the highest photosynthetic rate was found in Achillea wilsoniana and Festuca glauca. Vegetation restoration can ameliorate soil conditions. Ceramsite and bark plots had efficient effects on ecological restoration, and the effect of adding soil mulch on soil moisture content was better than that of adding soil substitutes. Al (Echinaceapurpurea) and Bl (Achillea wilsoniana), which are the constructive plant species and showing good performance, significantly enhanced the soil's physicochemical properties and habitat suitability. Bl was more suitable for sunny plant habitats, and B2 was more suitable for shaded plant habitats. During different comparisons, we developed two plant community configuration optimization models, which are a preliminary response and supplement to the ecological design of microscale habitat patches in man-made urban environments, and solved the problem of direct application of plant communities in urban environments. [ABSTRACT FROM AUTHOR]

Urban nature is of vital importance for human well-being in an increasingly urbanized world. How to use fragmented urban green space characteristics to meet the ecological function and landscape activity needs efficiently and economically is an urgent design research problem to be solved. This study promoted the theory and practice of community ecology into the design of urban environment base the carrier as artificial habitat island, demonstrated the correlation and interoperability of the types of built environment habitats and plant community organization, and explored the different design models and correlation between habitats and design elements base the research through design. The research proposed five "Artificial Habitat-Island" optimization design models for five environmental green space categories in semi-arid microscale green space, and summarized the "Artificial Habitat-Island" designing process of construction and management maintenance evaluating landscape full life circle. Using hierarchical analysis to make a comprehensive assessment of "Artificial Habitat-Island" to verify its application function value, the G1, G3, B3 and B7 prominently enhanced ecological and landscape benefits. Not only had good regional landscape characteristics, its management and maintenance cost were also lower. "Artificial Habitat-Island" provided a new experimental medium of both ecological and experimental value in small-scale urban space, effectively improved the value of the built environment landscape with using stable and high-quality local plant community, which was more conducive to the study of manual intervened groundcover plant community composition. [ABSTRACT FROM AUTHOR]