Assessment and Mapping Green Areas Ecosystem Services and Socio-Demographic Characteristics in Turin Neighborhoods (Italy)

Evaluation of Different Combinations of Ornamental Perennials for Sustainable Management in Urban Greening

Ornamental perennial plants play a strategic role in reducing green areas' management costs, keeping the ground, sparing water, and avoiding weeds. The aim of this research is to evaluate the growing performances of seven combinations of six different ornamental perennial herbaceous species and their role in weed containment under low-maintenance conditions. The experiment was performed for three years (2019-2021) in an open field. The selected species were Hemerocallis "Stella de Oro" (A), Phedimus spurius (M.Bieb.) "t Hart 'John Creech" (B), Tulbaghia violacea Harv. (C), Phlox subulata L. "Trot Pink" (D), Potentilla neumanniana Rchb. (E), and Gaillardia "Kobold" (F). Four replicates for each combination were tested (28 plots, 4 m2 each): AB, CD, EF, AB + CD, AB + EF, CD + EF; AB + CD + EF. No watering or fertilization was performed during the cultivation period. Each year, from April to November, three manual weeding activities were performed and the dry weights of the weeds' aerial parts were measured. The ground cover performance was evaluated through digital image analysis using the mobile device application Canopeo. Dry aerial perennial biomass variations between the end and beginning of the experiment were calculated. As a result, CD showed the best performance for weed containment (0.5 g m-2 weed dry weight in the third year), ground cover (63.1% and 64.3% of plot coverages during the second and third years, respectively), and producing ornamental biomass (4316.8 g m-2). The highest total dry amount of harvested weeds was shown by AB + CD + EF (1114.6 g m-2), demonstrating that combinations with a higher number of species were less efficient in avoiding weeds. The research allowed us to identify the best combinations to always keep the soil covered and to improve the ornamental and environmental values of urban green spaces under low-maintenance regimes.

Generalized Additive Model Reveals Nonlinear Trade-Offs/Synergies between Relationships of Ecosystem Services for Mountainous Areas of Southwest China

Ecosystem services (ESs) are an essential link between ecosystems and human well-being, and trade-offs/synergies happen in ESs at different temporal and spatial scales. It is crucial to explore patterns of trade-offs/synergies among ESs, and their nonlinear relationships with changes in ESs. The primary objective of this study was to evaluate five ESs in 2000 and 2018: namely, water yield, food production, carbon sequestration, soil conservation, and habitat quality in mountainous regions of Southwest China. The mean values of the five ESs increased by 365.8 m3/ha, 13.92 t/hm2, 497.09 TgC/yr2, 138.48 t/km2, and 0.002, respectively. Using spatial statistics and analysis, an ES trade-off synergy model (ESTD) was constructed for the five ESs change values. Overall, soil conservation has a trade-off with all five ESs, except habitat quality; this trade-off is increasing slightly. Water yield is in synergy with all ESs except soil conservation, with decreasing synergy; habitat quality is in synergy with all ESs except food production, with increasing synergy. Finally, the nonlinear relationship between the value of the change in the ES and ESTD was analyzed using a generalized additive model. Changes in water yield showed the greatest impact on ESTD except for food production, wherein changes in all three ESs had minimal impacts on ESTD. Food production dominates its trade-offs/synergies relationship with soil conservation; carbon sequestration is the dominant player in its trade-offs/synergies relationship with soil conservation. Habitat quality has a secondary position of influence, except in the trade-offs/synergies involving food production. By exploring the drivers of trade-offs/synergies among ESs, this study can provide guidance for the effective implementation of policies related to ecological protection and restoration.

Optimization Strategy for Parks and Green Spaces in Shenyang City: Improving the Supply Quality and Accessibility

In this study, we evaluated the supply quality of parks and green spaces within the Third Ring Road area in Shenyang city by combining a landscape pattern index analysis with a principal component analysis. Moreover, a network analysis based on the ArcGIS platform was used to measure the accessibility of parks and green spaces. The research results showed that the overall supply quality of parks and green spaces (−9.55) must be improved. The supply quality levels of the four analyzed park types could be ranked as follows: garden parks (118.00) > community parks (73.67) > comprehensive parks (−16.64) > specific parks (−32.17). Among the analyzed recreation parks, the accessibility of daily recreation parks was poor, while the overall service efficiency of weekly recreation parks was better, except in a few regions. These research results can provide suggestions for future green space planning in Shenyang city. In addition, from the perspective of landscape patterns, studying the service quality of parks and green spaces can provide new ideas for further research on accessibility.

Stakeholders’ Perceptions on the Role of Urban Green Infrastructure in Providing Ecosystem Services for Human Well-Being

The perception of linkages between ecosystem services (ES) and the urban green infrastructure (UGI) is evaluated, and their impact on human well-being (WB) is defined. Using a theoretical approach, the UGI’s specific contribution to WB is calculated as the sum of the products of (a) the number of perceived ES per ES group and the WB weight factor divided by the product of (b) the number of respondents and (c) the sum of the products of ES and the WB weight factor. Stakeholders demand more ES than the perceived ES supply from all types of UGI, especially for the social relations component of WB. The highest number of perceived ES and greatest impact on all WB components is provided by urban forests. This method could be helpful in acknowledging ES and involving stakeholders not previously familiar with the ES concept with the aim of introducing ES into UGI governance.

Planning for Informal Urban Green Spaces in African Cities: Children’s Perception and Use in Peri-Urban Areas of Luanda, Angola

Urbanization has placed considerable constraints on the preservation and maintenance of formal green spaces in African cities. This situation has given attention to the potentials of informal green spaces (IGS). While studies on IGS in African cities is only emerging, scholarly and policy attention to children’s perceptions and use of IGS within Africa’s spatially expansive urbanism is limited. This study explores children’s perceptions, use, barriers, willingness, and suggestions for improving IGS in the peri-urban area of Funda in Luanda. Based on semi-structured interviews and focused-group discussions, the study revealed that, while IGS offered different ecosystem services, not all IGS were accessible to children, due to safety concerns, maintenance conditions, and parental restrictions. Children’s interest in maintenance activities and suggestions for improving IGS reflected their independent identities, sense of place, and cognitive capacity to contribute to planning their community. The paper submits that the potential role of IGS in Africa’s peri-urban areas can be improved by taking into account children’s agency and experiential knowledge of community spaces. For this reason, there is a need to recognize and engage children as co-producers of community knowledge and interventions.

Perceptions of Urban Green Areas during the Social Distancing Period for COVID-19 Containment in Italy

The scientific community recognizes that urban green areas play an important role in supporting human wellbeing. Green spaces are used differently by citizens accordingly to their age, gender, education, or lifestyle. During the coronavirus disease (COVID-19) pandemic period in 2020, public green areas were closed due to the limitations imposed by social distancing in Italy and people were forced to stay at home. The aim of this research was to investigate the importance of public green areas in the life of the population in relation to the limits imposed during the first lockdown in Italy. A participatory approach was used, and an online questionnaire focused on people’s perceptions about the public attendance in green areas and their main uses pre-, during, and post-COVID-19 emergency period was administrated randomly to the adult population. The questions focused on the habit, frequency, and duration of park visits and about the individual perceptions and feelings about the green areas close (maximum 200 m distance) to their residences. A total of 3286 responses were obtained and analyzed at national and regional levels (Piemonte). In order to have a general national overview, a basic descriptive statistic was applied using all answers, elaborated in the form of percentages. At the regional level, questions were selected and compared to determine if answers were in related. Statistical analyses with chi-square tests and correspondence analyses were performed. The results indicated that the social distancing period for COVID-19 containment in Italy influenced perceptions about urban green areas. The importance of having outdoor green spaces was highlighted and an increase in interest about urban green areas was observed. Future planning strategies will have to consider the need of designing urban green areas for having more livable cities.

Ambient Air Quality as a Condition of Effective Healthcare Therapy on the Example of Selected Polish Health Resorts

This article discusses the importance of air quality for the organization and functioning of health resorts. Ten different types of resorts located in various regions of Poland were compared in terms PM10 concentration. Additionally, comparative analysis of the high-PM10 episodes was performed in three urban agglomerations located near the analyzed health resorts. The article also discusses formal, legal, and economic instruments that are the basis for legislative actions as tools for managing the air quality in the selected resorts. The analysis of the average annual concentrations in 2015–2019 did not show any exceedances of the PM10 limit value for any of the health resorts studied. High PM10 concentration values in 2018 were recorded for the number of days in exceedance of the limit value, especially in the health resorts of Uniejów, Ciechocinek, and Szczawno-Zdrój. Health resorts located in the south of Poland were identified as the most at risk in terms of the occurrence of limit value exceedances, information, and alert thresholds. It was concluded that the implementation of the so called “anti-smog” resolutions, including the development of financial support for changing the heating system to eliminate coal boilers and furnaces, is absolutely necessary for air quality improvement.