Research & reports

John Taylor, Sarah Taylor Lovell, Sam E. Wortman, M.K. Chan · Renewable Agriculture and Food Systems · United States (Chicago)

In Chicago, semi-structured interviews and plant inventories were conducted with 59 African American, Chinese-origin, and Mexican-origin households regarding ecosystem services and tradeoffs in their home food gardens. A total of 387 plant species were identified; gardens of African American households were rich in ornamental species, while those of Chinese-origin households had a depauperate flora. Shade trees and a developed shrub layer were absent from most gardens, suggesting a tradeoff in ecosystem services favoring food production. Only 9.6% of the inventoried species were native to the Chicago area.

Nicolás Cuvi · Americanae (AECID Library) · France (Paris)

The journal "Letras Verdes" called for reflections on biodiversity and urban agriculture, but many proposals were not published due to their technical report nature and lack of reflection on the meaning of these spaces. However, the article by Ana Cristina Torres et al., "Exploring the human-nature relationship: urban agriculture, conservation sciences, and the city," analyzes community gardens in Paris. In these spaces, dedicated to urban agriculture, the meaning of "nature" is redefined while new meanings about the city are constructed.

Yuanyuan Shi, Min Qingwen, Lu He, Fuller Anthony M · Journal of Resources and Ecology · China

This paper proposes "Agricultural Heritage Systems" as an entry point to balance urban and rural development in China, addressing threats posed by rapid urbanization. It focuses on public dietary change, agricultural industry development, institutional guarantees, ecological restoration, and cultural tourism in urban and peri-urban agricultural heritage sites, establishing a development model that balances urbanization and urban-supported agriculture. The paper argues this approach can preserve traditional culture, maintain organic farming, leverage landscape tourism, and utilize urban funds and technology to support rural enterprises.

Annette Voigt, T. E. Leitão, Andrew Hursthouse, Ari Jokinen, Avigail Heller, Monika Latkowska, Paulo Brito da Luz, Yvonne Christ, Béatrice Bechet, Mart Külvik, Johannes Langemeyer · · Global

This chapter presents guidance on tools for undertaking an ecological assessment with a simple, integrated, and systemic approach using sets of indicators. Agro-environmental indicators allow efficient assessment of the state, trends, and rate of change of environmental status or ecosystem services. Indicators for a garden’s suitability as a habitat depend on selected species and their demands. Gardens near the seashore require coping with difficult environmental conditions, and water requirements vary by climatic zone and crop evapotranspiration rates. Improving physical and chemical soil conditions generally enhances crop growth and reduces risks of erosion, compaction, and poor drainage. Urban gardening can expand habitat areas for particular animal species from nearby green areas. The chapter provides information on minimizing main risks from urban environmental pressures on urban gardening.

Andrew Hursthouse, T. E. Leitão, Annette Voigt, Avigail Heller, Béatrice Bechet, Paulo Brito da Luz · HAL (Le Centre pour la Communication Scientifique Directe) · Europe

This chapter overviews factors influencing the chemical, physical, and biological status of soils, water, and the biosphere in urban allotment gardens. It highlights that urban garden soils, water, and biosphere are affected by pollution due to their location in city centers or suburbs, with traffic infrastructure and industrial zones widely identified as impacting soil and water quality. Concerns over long-term risks from pollutant transfer (mainly metals) from soil to plants in these uncontrolled environments have been widely publicized.

刘颂, 潘鸿婷 · 中国城市林业 · China

This review discusses the definition of urban agriculture landscapes, examines the significance and characteristics of creating them, and identifies the need to introduce new technologies into their construction. It summarizes the application of related techniques from three perspectives — habitat construction, vertical (stereoscopic) agriculture, and artistic creation — as a reference for building urban agriculture landscapes that combine productivity, technical refinement, and landscape aesthetics.

· International Journal of Science and Research (IJSR) · India

A study of the pink hibiscus mealybug (Maconellicoccus hirsutus), documented as a growing urban pest in the agricultural fields of Vadodara, India. Regular visits to agricultural fields and community gardens over two years (April 2013-April 2015) tracked the pest's morphology, biology, distribution, and relation to biotic and abiotic factors, along with damage type and extent on different host plants. Major infestation occurred on Annona squamosa, followed by significant infestation on Hibiscus rosa-sinensis and Gossypium hirsutum (cotton), with adult females and nymphs as the main infesting stages and damage peaking in the winter months of November to February. The study also documented a mealybug-ant mutualistic association and noted that the prevailing use of chemical pesticides in the city is a probable reason for the growing mealybug population.

Mohsen Kalantari, Somaye Ghezelbash, Bamshad Yaghmaei · Mediterranean Journal of Social Sciences · Global

A survey of citizens' expectations and attitudes toward participating in rooftop garden (green roof) development, examined in relation to behavioral, social and demographic variables, was conducted across districts of Zanjan city, Iran, in 2016. A questionnaire was administered to 313 randomly selected residents, with data analyzed using chi-square tests and the Pearson correlation coefficient. Respondents identified the main perceived benefits and barriers of green roofs; while people expressed interest in installing rooftop gardens, no volunteers came forward to do so. Financial and technical support from municipalities and urban managers was the main expectation residents held.

Leila de Castro Louback Ferraz, E. R. de O. Carvalho, Mayara Márcia Sarsur Viana, Nathália Rabelo Pereira Oliveira · Cadernos de Agroecologia · Brazil

A study of community gardens run by the municipal government of Sete Lagoas, Minas Gerais, Brazil for nearly 33 years — cited as a reference example of urban agriculture in Brazil — found that more than 95 plant species are cultivated there, spanning food, condiment, ornamental and medicinal uses. This is described as contributing to improved quality of life for the population by securing food security with variety and quality, as well as playing a role in guaranteeing income in the urban setting.

Tkachenko Kirill · HORTUS BOTANICUS · Russia

This study analyzed records of plant introductions over the past 60 years to the North American and Himalayan sections of the Alpinarium (rock garden) at the Peter the Great Botanical Garden in Russia. Around 385 plants from 61 families were introduced during this period: the exposition held about 130 species from 51 families in the 1960s, 254 plants from 55 families twenty years later, and 249 taxa from 52 families in the early 21st century, and following a major reconstruction and collection addition starting in 2010, the exposition comprised 200 species from 54 families as of 2015.

Thomas Elmqvist, Erik Gómez‐Baggethun, Johannes Langemeyer · · Global

A review discussing ecosystem services in rapidly urbanizing settings, framing cities as both major centres of demand for ecosystem services and sources of environmental impact, arising from a tightly coupled social-ecological system. It notes that food supply from urban agricultural land and gardens has played a critical role in cities' historical development, and that urban green infrastructure — particularly trees — removes air pollutants and gases, while features such as coarse woody debris, in-channel gravel beds and wider vegetation buffers can enhance nutrient retention. It states that city authorities worldwide are seeking ways to maintain and expand green infrastructure through urban planning. The text is a review and presents no original data or case measurements.

European Environment Agency · Climate-ADAPT (European Environment Agency) · Switzerland

Basel mandated green roofs on new and renovated flat roofs via a 2002 amendment to its building law, reinforced in 2010. By 2006 the city had 1,711 extensive and 218 intensive green roofs, with about 100 new roofs covering 80,000 m2 installed each year since; by 2019 Basel had 5.71 m2 of green roof per inhabitant, among the highest per-capita green roof coverage in the world. The roofs are reported to cut stormwater runoff by 17-20% and lower indoor temperatures by up to 5°C.

S.G. Potts, V.L. Imperatriz-Fonseca, H.T. Ngo · Secretariat of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), Bonn, Germany · Global

IPBES's first international science assessment on pollinators, pollination and food production (552 pages), approved at its 4th Plenary session in Kuala Lumpur, Malaysia in February 2016. It covers animal pollination as a regulating ecosystem service underpinning food production, gene flow and ecosystem restoration, addressing the roles of native and exotic pollinators, status and trends in pollination networks, drivers of change, impacts on human well-being, and the effectiveness of policy responses. The Assessment was formally endorsed by the Convention on Biological Diversity's COP13 and prompted national pollinator strategies in countries including France, the Netherlands, Brazil, South Africa and the Republic of Korea.

Sakurai Shin · Nippon.com · Japan

A feature on the Ginza Honey Bee Project ('Ginpachi'), a nonprofit founded in March 2006 by Tanaka Atsuo, which installed beehives on the roof of the Kami Parupu Kaikan building in central Tokyo, drawing nectar from Hibiya Park and the Imperial Palace grounds within roughly a 3km radius. A decade on, the project has grown to 150 members, supplies honey products sold at the Matsuya Ginza department store and honey cocktails at nearby bars, and has inspired more than 100 urban beekeeping projects nationwide as well as projects in South Korea, Taiwan and elsewhere in Asia.

· 農林水産省・国土交通省 · Japan

Government explainer of the 2015 Urban Agriculture Promotion Basic Law, setting out its purpose, principles, and the responsibilities of national and local governments, and articulating the multifunctional roles of urban agriculture.

Taylor J.R., Lovell S.T. · Renewable Agriculture and Food Systems 30(1):22-32 · Global

Studies African American, Chinese, and Mexican-origin home gardens in Chicago, finding that ethnic gardeners saving open-pollinated traditional crop seeds preserve agrobiodiversity while reproducing cultural identity and supporting community food systems.

山口 創 · 食資源教育研究センター報告（CEIS Papers）, 29: 83-88 · Japan

Through interview surveys of three cases (Komoike-dainagon bean, Harima-o garlic, Himeji-ebiimo taro), this paper analyzes the process by which local varieties become recognized regional resources and the challenges of their development.

Lowenstein D.M., Matteson K.C., Minor E.S. · Oecologia, 179(3):811-821 · United States

A study measuring wild bee diversity and cucumber pollination (a pollination service) across urban Chicago. Sites with more bee species had better pollination, and even densely populated residential areas supported high bee richness. It demonstrates that growing diverse flowers in urban gardens sustains pollinators and directly benefits urban agricultural yields.

· Journal of Environmental Studies and Sciences · United States

Documents seed exchange networks in the United States (including the Seed Savers Exchange) and their role in food system resilience and heritage crop diversity.

von Döhren P., Haase D. · Ecological Indicators · Global

Reviewing 103 studies, the paper synthesizes ecosystem disservices, functions of urban green and agricultural spaces perceived as negative for human well-being, such as pests, allergens, pollution, and wildlife conflict, and argues that valuing only benefits while ignoring disservices is inadequate.

Sheryn D. Pitman, Christopher B. Daniels, Martin Edward Ely · Transactions of the Royal Society of South Australia · Australia

A literature review conducted between 2012 and 2014 for the South Australian Green Infrastructure Project established the diverse benefits of Green Infrastructure. These benefits include temperature modification, improved human health, enhanced community liveability, effective water management, increased economic prosperity, biodiversity conservation, and extensive urban food production. The paper primarily focuses on Green Infrastructure's contribution to climate adaptation and protection.

Laure‐Elise Ruoso, R. Plant, Pierre Maurel, C. Dupaquier, Philip Roche, Muriel Bonin · Ecology and Society · France (Thau Lagoon)

This record is a citation for a study on reading ecosystem services at the local scale through a territorial approach, focusing on peri-urban agriculture in the Thau Lagoon, Southern France. The abstract provides only the citation information and no further details about the study's methods or findings.

Marta Camps‐Calvet, Johannes Langemeyer, Laura Calvet‐Mir, Erik Gómez‐Baggethun, Hug March · Dipòsit Digital de Documents de la UAB (Universitat Autònoma de Barcelona) · Spain (Barcelona)

This research examined the role of urban gardens in building community resilience and articulating resistance in Barcelona, Spain, based on data from 27 urban gardening initiatives (13 self-governed, 14 public). Results showed that urban gardens contribute to resilience by fostering social and ecological diversity, transmitting local ecological knowledge, and creating opportunities for collective action and self-organization.

Judith Schicklinski · WIFO Studies · Europe

Across Europe, self-organized civil society movements are emerging to address local challenges, particularly in maintaining and developing green spaces where local governments face budget constraints. Initiatives like urban gardening demonstrate people's ability to cooperate, organize, and take responsibility for green spaces, introducing practices that support socio-ecological transition. These activities contribute to urban sustainability by providing ecological benefits and recreational opportunities.

Soyoung 백소영Baek, Mooyoung 한무영Han · 한국생태환경건축학회 학술발표대회 논문집 · South Korea (Seoul)

A comparative study of a concave green roof and a normal roof was conducted on building #35 at Seoul National University in Seoul, South Korea. The study aimed to validate the effects on urban flood mitigation, urban heat island reduction, and food production. The concave green roof demonstrated a 60% reduction in peak flow quantity, a 3-hour delay in peak time, and stored 6.7 tons of rainwater per 140 m². A temperature difference of 27 °C was observed, and the 420 m² green roof for urban agriculture is managed by over 30 households near the campus.