Research & reports

Alessio Russo, Francisco J. Escobedo, Giuseppe T. Cirella, Stefan Zerbe · Agriculture, Ecosystems & Environment, 242, 53-66 · Global

A foundational paper proposing and reviewing the concept of Edible Green Infrastructure (EGI), addressing the neglect of provisioning (food) ecosystem services in green infrastructure planning that has emphasized regulating and cultural services. It frames allotment gardens, rooftop gardens, edible landscapes and urban forests as a multifunctional green network that, with best management practices to minimize disservices, can enhance food security and urban resilience.

Brenda B. Lin, Stacy M. Philpott, Shalene Jha, Heidi Liere · Greening Cities (Advances in 21st Century Human Settlements), Springer, 155-179 · Global

A book chapter framing urban agriculture—community farms, rooftop gardens, edible landscaping and urban orchards—as 'productive green infrastructure' supplying high biodiversity and diverse ecosystem services. It synthesizes both ecosystem services (pollination, biological pest control) and social benefits (food and nutrition, cultural and recreational value) that this green infrastructure delivers to cities.

Tieman D., Zhu G., Resende M.F.R., Lin T., Nguyen C., Bies D., Rambla J.L., Beltran K.S.O., Taylor M., Zhang B., Ikeda H., Liu Z., Fisher J., Zemach I., Monforte A., Zamir D., Granell A., Kirst M., Huang S., Klee H. · Science 355(6323):391-394 · Global

Quantified flavor chemicals across 398 modern, heirloom, and wild tomato accessions and linked them to consumer liking. Shows modern cultivars lost allelic diversity governing sugars, acids, and volatiles, explaining reduced flavor versus heirlooms.

Guzman C. · Sustainable Landscape Planning in Selected Urban Regions (Springer, Tokyo) · Philippines (Metro Manila)

This book chapter reviews urban agriculture initiatives, practices, and impacts in the Philippines, using Metro Manila vegetable production and peri-urban jasmine cultivation as case studies. It highlights employment and income benefits while identifying land-use competition and lack of clear policy as major threats to continued urban farming.

Hagolani-Albov S.E. · Focus on Geography, Vol. 60, No. 1 · Finland (Helsinki)

This photographic study documents four forms of urban agriculture in Helsinki — colony allotments, market gardens, box gardening, and community-supported agriculture — tracing over a century of practice and illustrating how urban farming is spatially and institutionally embedded in the city.

Hall D.M., Camilo G.R., Tonietto R.K., Ollerton J., Ahrné K., Arduser M., Ascher J.S., Baldock K.C.R., Fowler R., Frankie G., Goulson D., Gunnarsson B., Hanley M.E., Jackson J.I., Langellotto G., Lowenstein D., Minor E.S., Philpott S.M., Potts S.G., Sirohi M.H., Spevak E.M., Stone G.N., Threlfall C.G. · Conservation Biology, 31(1):24-29 · Global

A review by an international team arguing that, as pollinators decline globally under agricultural intensification and pesticide use, cities can serve as important refuges for insect pollinators including native bees. It highlights the conservation value of designing and managing urban green spaces such as gardens and community plots for pollinators, framing citizen urban agriculture as a contributor to biodiversity conservation.

Jennifer Wilhelm, Richard G. Smith · Renewable Agriculture and Food Systems · Global

This 2017 global review analyzed 320 peer-reviewed papers on urban and peri-urban agriculture (UPA) published between 2000 and 2014, focusing on UPA's impact on ecosystem services (ES) and land sparing potential. The review found that while UPA research is growing, few studies (n=15) place UPA in the context of ES, and no studies explicitly quantify its land sparing potential. Additionally, few studies (n=19) quantify UPA's production potential, indicating a significant data gap.

Brenda B. Lin, Monika Egerer · · Global

Urban agriculture, the production of food and livestock in urban areas, is a key component of urban green infrastructure, supported for food security and biodiversity enhancement. While habitat management in urban agriculture aids local biodiversity and food production, the effect of native plants on beneficial insects and ecosystem function is debatable. Declines in urban bees are likely linked to increased impervious cover, which reduces habitat and restricts bee movement.

Emily S. Minor, Elsa C. Anderson, J. Amy Belaire, Megan Garfinkel, Alexis D. Smith · · Global

This chapter explores the benefits of green infrastructure networks for urban biodiversity and proposes strategies to enhance their extent, performance, and connectivity. It suggests that planting lower-maintenance vegetation in urban green spaces, including urban agriculture and cemeteries, can reduce costs and improve air quality while providing habitat. The concept of ecological land-use complementation is introduced, where clustered urban land uses synergistically support biodiversity.

Michael Kennedy · OpenSIUC (Southern Illinois University Carbondale) · Global

Community gardens can serve as important local greenspaces to address environmental degradation and educate individuals about the importance of food and the environment. However, certain barriers need to be overcome and addressed before community gardens are successfully implemented. Participation and interaction within community gardens may provide a pathway to long-term commitment to sustainability, encouraging individuals to adopt more environmentally supportive behaviors and a deeper commitment to environmentalism.

박진 · 한국양봉학회 학술대회 자료집 · Global

This report examines the global rise of urban beekeeping, noting its diverse approaches across countries like the UK, Japan, and Denmark. While South Korea has seen an increase in urban beekeeping since 2012, with government support initiated in 2016, the sector faces significant challenges. Urban beekeeping is still largely viewed as a derivative of conventional beekeeping, and a lack of ordinances or legal frameworks hinders its widespread adoption and recognition of its environmental, social, and economic value.

J. Chan, Bryce DuBois, Kristine T. Nemec, Charles Francis, Kyle D. Hoagland · CABI eBooks · Global

This chapter examines community gardens in three distinct urban locations in the Global North through the lens of social-ecological resilience. Case studies focus on Vienna, Austria; Lincoln, Nebraska, USA; and New York City post-Hurricane Sandy. These community gardens support vital social-ecological functions, ranging from generating local ecosystem services to cultivating community empowerment and bolstering food sovereignty, reflecting their local contexts.

Ellen Almers, Per Askerlund, Sofia Kjellström · The Journal of Environmental Education · Sweden

This qualitative study in Sweden explored forest garden educators' ideas and experiences in a three-year project with primary school children, using interviews and observations. It found that educators aimed to provide children with opportunities to feel belonging, experience self-regulation and systemic dependence, co-create with non-human organisms, and imagine place transformation. The study discusses four pedagogical features of forest gardens.

Maryanti Mohd Raid, Muhammad Uzair Azizan, Khadijah Hussin, Megat Mohd Ghazali Megat Abd Rahman · Journal of Technology Management and Business · Malaysia

This article analyzed the environmental benefits of rooftop gardens as part of urban greenery systems in Malaysia. An in-depth interview with seven experts revealed a consensus that rooftop gardens can effectively address several urban environmental issues. However, the study emphasized that the function and purpose of the rooftop garden must be considered during design and construction to fully achieve its objectives, whether for recreation or environmental purposes.

A. N. Sarkar · · Global

This paper discusses design procedures and criteria for vertical gardens (living walls) and green roofs. Vertical gardens are suitable for urban areas, offering uses like urban agriculture, while green roofs provide ecosystem services such as mitigating urban heat island effects and improving biodiversity. Both technologies are recognized globally for environmental benefits, with a thriving industry and extensive research, particularly in Europe.

Clement Anguh Nkwemoh, Mesmin Tchindjang, Roland Ngwatung Afungang · International Journal of Innovative Research and Development · Cameroon (Yaounde)

A study in Yaounde, Cameroon, investigated the impact of rapid urban expansion on vegetation cover using maps, images, questionnaires, and interviews. The findings revealed a significant depletion of flora due to settlement expansion. Forest degradation was attributed to the demand for construction materials, fuelwood, woodworking, and the need for space for urban agriculture, among other factors.

Lucy Bradley, Bridget K. Behe, Natalie R. Bumgarner, Charlotte Glen, Joseph Donaldson, Ellen M. Bauske, Sheri Dorn, Gail Langellotto · HortTechnology · Global

This study discusses the difficulty in documenting the economic contributions and benefits of consumer horticulture (CH) and CH extension programs. CH can result in individual outcomes such as money saved and improved quality of life, and community-level impacts like water quality protection. Quantifying these values is challenging but can be evaluated using several strategies, including measuring consumer dollars spent on gardening supplies, the value of environmental ecosystem services, and cultural, social, and health system services.

Craig J. Pearson · · Global

This chapter addresses three aspects of agricultural biodiversity, primarily using examples from urban agriculture. It suggests viewing biodiversity as a component of land-use that contributes 'public value', rather than a suite of goals competing with food production. The chapter enumerates knowledge of land-use issues that preserve or improve agricultural biodiversity and discusses options for changing land-use to achieve this.

Jason Byrne, CM Pickering, DA Guitart, R Sims-Castley · eCite Digital Repository (University of Tasmania) · Australia

This chapter addresses the implications of urban cultivation initiatives for land-use planning and policy, against a backdrop of renewed interest in urban agriculture due to global urbanization impacts such as dwindling green spaces, food insecurity, land shortages, and loss of biodiversity. These initiatives are often framed around the social benefits of local food growing and sustainability, with residents clamoring for better access to places to grow safe and healthy food, spaces that foster social inclusion, and improved environmental quality.

Galen D. Newman, Alison L. Smith, Samuel D. Brody · Landscape Journal · 米国（湾岸都市）

Proposes a regional growth framework that repurposes vacant lots with high ecological potential as connectors between habitat patches, balancing storm-protection development pressures with ecosystem services. Supports planning logic for dotted vacant-lot gardens and green links in hillside or fragmented urban fabric.

Anna Grichting · Kobra (Universitätsbibliothek Kassel) · Global

Set against the backdrop of food and water security in Qatar, and recognizing that rapid urbanization not integrated with ecological landscape design is driving urban sprawl, fragmented landscapes and biodiversity loss, this paper presents research on edible landscapes at Qatar University's architecture department, framed around its regenerative-cities concept, aimed at contributing to campus food supply while promoting biodiversity. Drawing on examples from edible campuses worldwide and literature on permaculture and food urbanism, an analysis of existing and future campus buildings and landscapes identified intervention types: retrofitting existing buildings with green roofs, green walls and biodiversity habitats; transforming existing landscapes; using empty land for food production; and integrating food gardens into the design of future buildings. The vision also includes water recycling and treatment, organic waste recycling, renewable energy, citizen participation and awareness campaigns, and collecting quantitative data on food miles.

M. Bare, Raymond M. Danner · Ecological Restoration · Global

A 2017 study surveyed bird communities in three forest sites with different restoration and natural revegetation histories, 20–40 years since clearing, within a tropical urban-agricultural landscape in the Ecuadorian Amazon, comparing manually restored and naturally revegetating forest. A diverse assemblage of birds was found visiting and occupying the forest fragments, including two IUCN-listed near-threatened species. Bird species richness was similar across sites with different management histories and species composition varied only slightly, but differences existed in the presence and occupancy of forest-dependent groups such as large frugivores and forest insectivores. In the manually restored site, bird diversity may have been limited by under-developed forest structure, though the effects of patch size and landscape matrix could not be isolated. The study suggests future restoration efforts consider forest structure alongside plant species diversity, and that future studies account for landscape and matrix parameters when evaluating restoration projects.

Selena Ahmed, Sarabeth Buckley, Anne Elise Stratton, Feven Asefaha, C. Butler, Matthew J. Reynolds, Colin M. Orians · Agroecology and Sustainable Food Systems · Global

A study on green-roof urban agriculture, which faces the ecological challenge of limited soil moisture, compared two soil moisture management practices — sedum (Sedum album) groundcover versus watering — for their effects on the performance and quality of three perennial culinary herbs: thyme, mint and oregano. Individually and interactively, sedum groundcover and watering significantly affected performance measures (biomass, vitality, module coverage) and quality (total phenolic concentration) during early establishment, but had variable effects at later developmental stages. The results suggest sedum groundcover can substitute for watering of hardy culinary herbs on green roofs in terms of plant performance and quality.

Yann Dusza, Sébastien Barot, Yvan Kraepiel, Jean-Christophe Lata, Luc Abbadie, Xavier Raynaud · Ecology and Evolution · Global

This study examined how combinations of 20 plant species from 5 families, two substrate types (natural soil vs. artificial), and two depths (10 cm vs. 30 cm) affect green roof ecosystem functions including water retention, biomass production, nutrient cycling, and transpiration. Artificial substrates increased aboveground biomass 1.4-3.5 times relative to natural soil, and deep substrates produced 2-3 times more biomass than shallow ones on natural soil (1.4-1.9 times on artificial substrate), but no single combination of factors enhanced all studied ecosystem functions simultaneously.

Castaneda-Alvarez N.P., Khoury C.K., Achicanoy H.A., Jarvis D.I., Maxted N., Toll J. · Nature Plants · Global

Models the distribution of 1,076 taxa related to 81 crops, finding over 70% are high priority for further collection because they are poorly represented in genebanks relative to their native ranges.