[Research progress on the differences and connections between supply and demand of urban green space]. / åŸŽå¸‚ç»¿åœ°ä¾›éœ€çš„å·®å¼‚ä¸Žè”ç³»ç ”ç©¶è¿›å±•.

As an important concept connecting urban green space (UGS) with the residents' demands, supply and demand of UGS is an important part of UGS research and planning. Identifying the difference and connection between UGS supply and demand contributes to proper configuration of UGS, human well-being improvement and urban sustainability. We reviewed literature on UGS supply and demand from 2016 to 2020, summarized common research topics and paradigms, examined associations among these topics, and proposed suggestions for future studies. We found that most studies focused on either USG supply or demand, and rarely analyzed match between UGS supply and demand. The studies of UGS supply mainly focused on the spatial and temporal patterns and the ecosystem services they provided, while the studies of demand focused on residents' subjective preference and behavior. Studies on supply and demand often differ in research objects, scales, and indicators, which was a major obstacle to construct relationships between them. We proposed that future studies should focus on the match of supply and demand. A possible way to achieve this goal is to measure UGS demand by both objective indicators and subjective preference.

[Research progress on relationship between urban greenspace distribution and the socioeconomic characteristics of residents]. / åŸŽå¸‚ç»¿åœ°æ ¼å±€ä¸Žå± æ°‘ç¤¾ä¼šç»æµŽç‰¹å¾å ³ç³»ç ”ç©¶è¿›å±•.

Urban greenspace, which serves as a place for residents to connect with nature and relax, provides important ecosystem services. Access to greenspace is often related to the socio-economic characteristics of residents, which received a lot attention from researchers and practitioners. Previous studies have mostly focused on single city to analyze the spatial relationship between greenspace distribution and residents' characteristics. We conducted a meta-analysis with global studies. The objectives were to classify findings from different cases and investigate the impacts from the location of research area, indicator and analytical method, and summarized major factors influen-cing the relationship between greenspace distribution and residents' characteristics. The results showed that more than half of the cases (58.2%) found that the socially advantaged population benefited more from greenspace. About a quarter cases (25.4%) revealed the opposite, that was, the disadvantaged population benefited more from greenspace. The remaining case studies (16.4%) did not find significant correlation between them. The studies reviewed here were diverse in terms of scale, indicator selection, and analytical method. Overall, we found no connection between finding and the choice of scale/indicator/analytical method. The reviewed case studies were mostly conducted in cities of western countries, which differed in their development trajectories and urban characteristics from cities in China. To understand association between urban greenspace and residents' characteristics in China, we urged to carry out more local studies, which would potentially provide scientific evidence for building sustainable cities during rapid urbanization.

[Spatial and temporal changes of the ecological vulnerability in a serious soil erosion area, Southern China.] / 南方水土流失严重区的生态脆弱性时空演变.

Research on eco-environment vulnerability assessment contributes to the ecological environmental conservation and restoration. With Changting County as the study area, this paper selec-ted 7 indicators including slope, soil type, multi-year average precipitation, elevation deviate degree, normalized difference vegetation index, population density and land use type to build ecological vulnerability assessment system by using multicollinearity diagnostics analysis approach. The quantitative assessment of ecological vulnerability in 1999, 2006 and 2014 was calculated by using entropy weight method and comprehensive index method. The changes of the temporal-spatial distribution of ecological vulnerability were also analyzed. The results showed that the ecological vulnerability level index (EVLI) decreased overall but increased locally from 1999 to 2014. The average EVLI values in 1999, 2006 and 2014 were 0.4533±0.1216, 0.4160±0.1111 and 0.3916±0.1139, respectively, indicating that the ecological vulnerability in Changting County was at the moderate grade. The EVLI decreased from 2.92 in 1999 to 2.38 in 2006 and 2.13 in 2014. The spatial distribution of the ecological vulnerability was high inside but low outside. The high vulnerability areas were distributed mainly in Hetian Town and Tingzhou Town, where the slope was less than 15° and the altitude was lower than 500 m. During the study period, Sanzhou Town had the largest decreasing range of EVLI while Tingzhou Town had the lowest.