@article{ShiHalikAblizetal.2020, author = {Shi, Lei and Halik, {\"U}m{\"u}t and Abliz, Abdulla and Mamat, Zulpiya and Welp, Martin}, title = {Urban Green Space Accessibility and Distribution Equity in an Arid Oasis City: Urumqi, China}, series = {Forests}, volume = {11}, journal = {Forests}, number = {6}, publisher = {MDPI}, issn = {1999-4907}, doi = {10.3390/f11060690}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-2385}, pages = {17}, year = {2020}, abstract = {Urban green space (UGS) is crucial to the healthy development of urban residents. However, UGS that is accessible can benefit residents to an even greater degree. Based on the two-step floating catchment area model (2SFCA) and the location quotient (LQ), we analyzed the changes from 1999 to 2019 in UGS walking accessibility and equity in built-up areas of Urumqi at different administrative levels, and how UGS policy affects the improvement of accessibility. The results showed that UGS accessibility and equity are not evenly distributed at different administrative levels and UGS categories. Although the overall UGS accessibility and equity has improved with policy implementation, these changes are caused by metro-level UGS construction in urban fringe areas. The improvement in UGS accessibility at the neighborhood level in densely populated areas is neglected, which leads to a mismatch between UGS construction and population distribution. In addition, the accessibility of UGS is also limited by geographical location, population density, road distribution, and water shortage in arid metropolitan Urumqi. Our research results provide a theoretical basis for Urumqi and other cities in the optimization of UGS structure and the realization of social equity.}, language = {en} } @article{ShiHalikMamatetal.2021, author = {Shi, Lei and Halik, {\"U}m{\"u}t and Mamat, Zulpiya and Aishan, Tayierjiang and Welp, Martin}, title = {Identifying mismatches of ecosystem services supply and demand under semi-arid conditions: The case of the Oasis City Urumqi, China}, series = {Integrated Environmental Assessment and Management}, volume = {17}, journal = {Integrated Environmental Assessment and Management}, number = {6}, publisher = {Wiley}, issn = {1551-3777}, doi = {10.1002/ieam.4471}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-5469}, pages = {1293 -- 1304}, year = {2021}, abstract = {Understanding the balance between supply and demand of ecosystem services (ESs) is helpful for sustainable urban management. However, the interactions among multiple ESs supplies and demands remain under-researched, and ESs supply and demand spatial heterogeneity and correlation characteristics at the city level are rarely studied, especially in arid areas. To fill this gap, we established a comprehensive assessment framework of ESs supply and demand through integrating multi-source remote sensing data, social economy, and policy objectives, for the oasis city of Urumqi, China. The ESs supply-demand mismatches were revealed at the city level, and the spatial relationship between the ESs supply and demand was analyzed using spatial statistics. The results demonstrated that: (1) The total quantity of supply and demand of food provision, carbon sequestration, PM10 removal, and recreation services in Urumqi revealed that the demand was greater than the supply, the deficits being 16.10 × 107 kcal/ha, 6.88 × 104 t/ha, 155.86 kg/ha, and 697.26, respectively. (2) The supply and demand assessment of ESs revealed spatial differences from the city center to the suburbs, which further indicated that there are neighborhood similarities between the supply and demand of ESs. (3) The matching types of ESs supply and demand present obvious spatial heterogeneity, which can be divided into four types: High-high, high-low, low-high, and low-low. Owing to rapid urban development in the inner city, the city center is dominated by low-high, whereas the urban-rural ecotone is characterized by high-low, owing to the higher elevation and water resource advantages in the suburbs. Based on the analysis of the supply, demand, and matching of ESs, economic development and sustainable management policies are proposed for different ecological spaces. Integr Environ Assess Manag 2021;17:1293-1304. © 2021 SETAC}, language = {en} } @article{ShiHalikMamatetal.2021, author = {Shi, Lei and Halik, {\"U}m{\"u}t and Mamat, Zulpiya and Aishan, Tayierjiang and Abliz, Abdulla and Welp, Martin}, title = {Spatiotemporal investigation of the interactive coercing relationship between urbanization and ecosystem services in arid northwestern China}, series = {Land Degradation \& Development}, volume = {32}, journal = {Land Degradation \& Development}, number = {14}, publisher = {Wiley}, issn = {1099-145X}, doi = {doi.org/10.1002/ldr.3946}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-5451}, pages = {4105 -- 4120}, year = {2021}, abstract = {Rapid urbanization has negative effects on ecosystem structure, function, and balance, leading to the loss of ecosystem services (ES) and posing a threat to regional sustainable development. However, the complex interactive coercing relationship between urbanization and ES is not yet fully understood, especially in arid Northwestern China. In this study, we constructed an evaluative framework for urbanization and ES using land cover/land use data and socioeconomic data from 1990 to 2018. We used global and local autocorrelation models to reveal the spatiotemporal interaction between urbanization and ES. The results revealed that the urbanization index increased from 0.06 in 1990 to 0.16 in 2018 in Xinjiang, and urbanization was significantly negatively correlated with ES. With the acceleration of urbanization, the ecosystem services value (ESV) has decreased 2,698.74 × 109 Yuan from 1990 to 2018 (6.62 Yuan = 1 .00 US\$). Due to geographical advantages, resource conditions, and land use changes, the spatial relationship of urbanization and ES has obvious heterogeneity. High-low correlation areas are mainly concentrated in the Northern Tianshan Mountain Economic Zone, whereas low-high correlation areas are concentrated in the Kashgar and Hotan Oases in southern Xinjiang. Based on regional geographical conditions and the spatial heterogeneity of resources, diversified ecological, social, and economic balance models should be considered to promote future sustainable urban planning and development.}, language = {en} }