Research & reports

Pierre Michard Beaujour, Frank Cézilly · Caribbean Journal of Science · Haiti (Port-au-Prince)

This survey assessed the distribution of pollinating insect orders in 16 urban green sites in Port-au-Prince, Haiti, from January to April 2018. Researchers collected 2,747 pollinating insects and found that insect order richness was significantly higher at agroforestry plantations compared to unexploited forest remnants. Site area, elevation, and built area percentage had no significant influence on the total number of insects collected.

Philip Donkersley, Sammy Witchalls, Elias H. Bloom, David W. Crowder · Agriculture Ecosystems & Environment · Global

A meta-analysis of 31 studies and a 5-year study on small pollinator habitats (30 m²) at community gardens and farms (150,000 m²) assessed the effect of pollinator planting interventions. Pollinator conservation interventions increased species richness and abundance in almost all studies, with greatest increases from hedgerows (40 m²) and herbaceous interventions (500 m²). Small interventions (∼500 m²) can significantly benefit pollinators, but only when densely distributed at a landscape level, and future research is needed on their cumulative effects.

Anna Grichting · · Qatar

This teaching experience, conducted over seven years at Qatar University, addressed the challenge of food production in desert regions within graduate and undergraduate architecture and urbanism courses. Students designed productive architectural and urban landscapes through vertical farming, community gardening, and urban farms, among other methods. Outcomes included an increase in the integration of food production systems into student projects and a vision for Qatar University as an "edible campus."

Bassey Ebenso, Akaninyene Otu, Alessandro Giusti, Philipe Cousin, Victor O. Adetimirin, Hary Razafindralambo, Emmanuel Effa, Vasileios Gkisakis, Ousmane Thiaré, Vincent Levavasseur, Sonagnon Kouhoundé, Kifouli Adéoti, Abdur Rahim, Majid Mounir · Frontiers in Nutrition · Global

This paper argues that adopting a One Health approach to urban agriculture is crucial for significantly increasing food yields and improving quality of life in cities, given global population growth and urbanization trends. It proposes six nature-based and climate-smart approaches, including reducing synthetic inputs and increasing biodiversity, to accelerate the transition to sustainable food systems. These approaches require cross-sectoral stakeholder engagement to ensure sustainable, nutritious, and accessible diets.

Barbara Schröter, Mario Brillinger, Sarah Gottwald, Paulina Guerrero, Jennifer Henze, Edward Ott, Stefan Schmidt, Christian Albert · Frontiers for Young Minds · Global

This article introduces the concept of nature-based solutions as a way to address societal problems such as climate and biodiversity crises. It explains how reconnecting floodplains can reduce flood risks, protecting wetlands or mangroves can store carbon, and planting trees or installing rooftop gardens can cool cities. The article emphasizes understanding how to work with nature and the practical steps for implementing these solutions.

Kathy Cabe Trundle, Rita Hagevik, Laura Wheeler, Katherine Vela, Michelle Parslow, David N. Joy · Science Activities · Global

This study introduces the Three Sisters Garden activity within a 3-H Social and Emotional Learning (SEL) Cycle for secondary school students. This activity teaches biodiversity and sustainability, encouraging students to connect their own need for social connections with plant growth. Students enhance their sense of participation in the scientific process by analyzing gardens from a systems perspective.

Geir Wæhler Gustavsen, Helge Berglann, Elisabeth Jenssen, Signe Kårstad, Divina Gracia P. Rodriguez · International journal on food system dynamics · Norway (Oslo)

This study conducted a contingent valuation survey in Oslo, Norway, to assess citizens' attitudes and willingness to pay for non-commercial (community gardens, educational gardens) and commercial (aquaponics, vertical farming) urban agriculture. The results indicate that Oslo citizens are willing to increase their tax payments to support the further development of urban farming in the city.

Petra Schneider, Tino Fauk · · Global

A study based on a literature review and field survey conducted from 2017 to 2020 in Ecuador, Germany, Sweden, Uganda, and Vietnam, examined the role of allotment gardens (AGs) in connecting nature and people. Allotment gardens provide substantial urban ecosystem services, contribute to habitat connectivity, and significantly impact human health. Beyond food production and recreation, they offer crucial benefits for public health, wellbeing, social inclusion, the environment, and serve as cultural archives, with their intrinsic purpose being connectivity for habitats, people, ecosystem services, and circular flux management.

Defne Sunguroğlu Hensel · · Global

This work, "Ecological Prototypes for Green Construction - 1", focuses on linking architecture and ecological engineering. Its purpose is to achieve integrated urban, agricultural, and ecological land use.

Tamer El Gabaly, Rasha Abd el-Lateef · Journal of Engineering Research - Egypt/Journal of Engineering Research · Global

This paper explores a new theory of sustainable architectural design, termed "Breathing Architecture," in the context of reducing fuel consumption and adapting to climate change. It uses a qualitative research methodology, including data collection, data analysis, theoretical analysis, and analytical case studies, integrating green technologies and sustainability. The aim is to develop a new architectural language based on dynamic relationships among materials, structures, and spatial ideas, with empirical application and study.

Ananere da Silva Crüz, Márcia Maria Rodrigues Sá, Tarcísio Dorn de Oliveira, Daniel Knebel Baggio, Nelson José Thesing, Sandra Beatriz Vicenci Fernandes · Revista GESTO Revista de Gestão Estratégica de Organizações · Global

This literature review highlights the importance of urban and peri-urban agriculture (AUPs) for food security, household economy, and biodiversity. It concludes that AUPs contribute to job creation, alternative income, supplying small markets, valuing local cultures, community empowerment, and expanding gender participation opportunities. AUPs also improve climate and biodiversity, enhance urban productivity, foster cooperation among residents, reduce temperatures, improve air quality, preserve natural resources, and mitigate food scarcity.

Blessing Chidinma Nwachukwu, Olubukola Oluranti Babalola · Frontiers in Sustainable Food Systems · Global

This review explores metagenomic techniques for studying plant root-associated microbiota and microbial ecology, highlighting their role in understanding and improving crop yields in rural and urban agriculture. Metagenomics, a non-culture approach, enables the identification of unculturable microorganisms and their functional traits. A detailed understanding of these organisms and their interactions can facilitate improved plant growth and sustainable crop production.

Ehsan Rahimi, Shahindokht Barghjelveh, Pinliang Dong · Agriculture & Food Security · Global

This study reviewed 87 articles on the presence of bees in urban gardens and urban farms, summarizing bee diversity, host plant attractiveness, and the effects of landscape variables. Urban environments, especially urban gardens, contained a high diversity of bees, with honeybees and bumblebees being the most dominant species. Native plants were more attractive to bees than non-native plants, and while urbanization negatively impacted bee presence, the presence of green spaces or other farms and gardens positively affected pollinators.

Tiong Ann Goh, Sorain J. Ramchunder, Alan D. Ziegler · CABI Agriculture and Bioscience · Global

Researchers assessed pseudo-total concentrations of cadmium, copper, lead and zinc in soils from community gardens, public parks and woodlands across Singapore, comparing them to risk guidelines and using lead isotope analysis to trace contamination sources. All measured concentrations were below thresholds considered to represent substantial risk, garden soils were largely equivalent in concentration to parks and woodlands though geographic distribution varied, lead sources were both anthropogenic and natural with spatial variability inconsistent with a single point source, and a correlation between copper and zinc suggested a shared source such as road traffic or atmospheric deposition; the study did not assess bioavailability or bioaccessibility of these elements, which it noted would be needed for a fuller risk assessment at sites with higher contamination.

Sara Rawal, Sandesh Thapa · Scientifica · Global

A survey of 116 randomly selected respondents conducted from February 3 to April 6, 2021 in Morang and Sunsari districts, Nepal, assessed rooftop garden (RTG) status, plant diversity and adoption determinants, finding that 30.5% of roofs in Morang and 33.2% in Sunsari were under rooftop farming and that adopters' roof size was significantly larger than non-adopters'. A binary logit model showed age, gender, schooling year, training and farming experience significantly affected RTG adoption; 50 nutritionally important species were reported, ornamental plants showed greater diversity than vegetables, and adopters reported that a lack of proper policy and ineffective management makes it difficult to sustain their rooftop gardens.

Jaime Pizarro‐Araya, Fermín M. Alfaro, Francisco Gómez, Roberto Villablanca · Anthropocene Coasts · Chile

A 2022 study characterized the taxonomic richness and abundance of terrestrial arthropod fauna at the Aguada de La Chimba urban coastal wetland in the Antofagasta Region, Chile, using multiple survey methods. From a total of 1,874 specimens, it identified 109 terrestrial arthropod species, with Insecta the most represented taxon (85 species, 47 families, 15 orders); by origin, communities included 24% native, 22% naturalized, and a smaller proportion of endemic species. The study reports that urban coastal wetlands are fragile ecosystems subject to serious disturbance in structure, function, and diversity from advancing urban, agricultural, foraging, and drainage activities, including displacement of endemic species by invasive ones, and discusses the major threats to this wetland alongside the importance of public-private partnerships with the local community for biodiversity conservation.

Paloma Cariñanos, S. Borelli, Michela Conigliaro, Alessio Fini · Urban Planning · Global

This review traces urban food forests (UFFs) from ancient practices of incorporating edible species into wild forests to their spread into ornamental urban landscapes since the mid-20th century. It argues UFFs face the same challenges as urban forests generally — land tenure, governance, technical capacity, pollution and global change — which must be addressed to balance their productive, environmental and socio-economic functions.

Marek Hekrle · Wiley Interdisciplinary Reviews Water · Global

A systematic review of 153 scientific publications examined data collection techniques and well-being perspectives used to elicit preferences toward multiple ecosystem services (ES) provided by nature-based solutions (NBS). Ecosystem services from urban parks, urban trees and community gardens were the most commonly examined, with questionnaire surveys the dominant data collection technique followed by semi-structured interviews and workshops, while only a limited number of studies used revealed- or stated-preference methods such as choice experiments or contingent valuation; the review defines three distinct well-being perspectives — individual, community and society — that it finds are rarely discussed explicitly in existing NBS literature.

Irina PANȚIRU, Erzsébet Buta, Dănuţ Maniutiu, Alexandru I. APAHIDEAN, N. Sima, Alex Dregan, Rodica Sima · Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Horticulture · Global

A 2022 literature review assessed the overall role and benefits of urban allotments and home gardens for urban green infrastructure (GI) in Global North countries, drawing on published evidence from 2000 onward and using narrative synthesis to interpret the research on domestic gardens and identify areas needing further study. The review found key differences in both the nature and management of urban domestic gardens with major implications for their contribution to GI sustainability, alongside heterogeneous social, cultural, ecological and economic contexts shaping that impact. It also noted that domestic gardens act as a source of food security and provide additional ecosystem services. The review concludes that home and allotment gardens are important contributors to urban GI sustainability and should be incorporated into the planning, design and management of urban infrastructure.

Eric J. Chapman, Gaston E. Small, Paliza Shrestha · Urban Ecosystems · Global

A study quantifying leachate and soil moisture from experimental urban garden plots receiving various soil amendments — high and low levels of manure and municipal compost, synthetic fertilizer, and no inputs — over three years. A simple mass-balance hydrologic model was parameterized for high-input municipal-compost and no-compost garden plots plus reference turfgrass plots, and run over three growing seasons under ambient precipitation and three elevated-precipitation scenarios. Soil moisture varied across treatments, with the highest mean levels in manure-compost plots and the lowest in synthetic-fertilizer plots. Soil amendment treatments explained little of the variation in weekly leachate volume, but high municipal compost and synthetic fertilizer had the lowest leachate volumes, while high and low manure compost had slightly higher volumes. Garden plots received 12-16% greater total water inputs than turfgrass plots due to irrigation, but total leachate was 20-30% lower for garden plots across climate scenarios because evapotranspiration was 50-60% higher in garden plots. Differences between high-municipal-compost and no-compost garden plots were small relative to the difference between garden plots and turfgrass overall. The study concludes that garden soil amendments influence water retention, and that the higher water retention, infiltration, and evapotranspiration potential of garden soils relative to turfgrass indicate hydrologic ecosystem services may be an underappreciated benefit of urban gardens.

Edgar Hiller, Zuzana Pilková, Lenka Filová, Martin Mihaljevič, Veronika Špirová, Ľubomír Jurkovič · Chemosphere · Slovakia (Bratislava)

A 2022 study of urban community gardens in Bratislava, Slovakia, measuring total metal(loid) concentrations in soils and in two commonly grown vegetables (tomato and lettuce), gastrointestinal bioaccessibility using a modified physiologically based extraction test (PBET), and stable lead isotopes. Although some soils would count as contaminated against Slovak agricultural-soil legislation, bioaccessibility in the intestinal phase did not exceed 20% except for cadmium, and tomatoes and lettuce contained low total and bioaccessible metal(loid) concentrations, making them safe for people eating their own produce. Lead isotope composition differed between bulk soils, vegetables and the bioaccessible fraction, with less radiogenic lead preferentially mobilised, and enrichment factors separated naturally derived elements (As, Co, Cr, Fe, Mn, Ni, V) from those with anthropogenic contributions. The result is a counterweight to blanket alarm about urban soil metals: exceeding a total-concentration threshold is not the same as a dose that reaches the human body.

Artmann M., Sartison K. · Making Green Cities: Concepts, Challenges and Practice (Springer, Cities and Nature series), 173-194 · Global

A case study analyzing the 'Edible City' of Andernach, Germany, as a multifunctional productive green space where citizens can harvest freely in public areas. Drawing on interviews with key initiators, it shows that the project generates multifunctional social, ecological and economic benefits addressing urban challenges such as food security, biodiversity and social cohesion, and examines its potential for upscaling local food supply.

Dorr, E., Goldstein, B., Horvath, A., Aubry, C., Gabrielle, B. · Environmental Research Letters 16, 093002 · Global

A systematic review and meta-analysis (53 studies) of urban agriculture's environmental impacts and resource use, quantitatively showing that effects vary widely by farm form, scale and technology, and evaluating life-cycle assessment against rural farming.

Langemeyer J., Madrid-López C., Mendoza Beltran A., Villalba Méndez G. · Landscape and Urban Planning 210, 104055 · Global

Critically examines whether urban agriculture is a 'necessary pathway' to urban resilience and global sustainability, evaluating its contributions and limits across five dimensions: food, water, energy, ecosystem services and social integration.

Helena I. Hanson, Emma Eckberg, Malin Widenberg, Johanna Alkan Olsson · Urban forestry & urban greening · Sweden (Lund)

This study explored private gardens' contribution to urban biodiversity and garden owners' wellbeing (in terms of cultural ecosystem services) in Lund, Sweden, through a garden land-use inventory and interviews with 35 garden owners. Results showed that urban development influences gardens' biodiversity potential by limiting available space or garden vegetation, with new properties having small gardens containing few biodiversity features and large trees. Important cultural ecosystem services included social bonds, recreation, nature experiences, and relaxation, which were influenced by age and gender.