Research & reports

Lindsay K. Campbell, Erika S. Svendsen, Renae Reynolds, Victoria Marshall · Social & Cultural Geography · United States (Rockaway, NY)

This study used Actor Network Theory to explore the material and social dynamics of a coastal community garden on public housing grounds in Rockaway, NY, after Hurricane Sandy. Three assemblages with different governance arrangements—tidal shore, garden plots, and treed lawn—were identified. However, "unruly" actors and actants, including people, saltwater, poison ivy, dogs, and trash, were found to spark controversy and resist governing.

Andréia Quinto dos Santos, Ricardo Jucá‐Chagas, Regileno da Silva Santana, Evton Farias Quinto Santos, ALISSON SANTOS DA SILVA · Brazilian Journal of Development · Global

This research evaluated the limits and possibilities of learning ecological interactions in elementary school using a school garden, involving a supervising teacher, a classroom teacher, and 30 students. While students demonstrated understanding of ecological interactions through oral communication, the study identified significant limitations including difficulties in reading and writing, a lack of volunteers, and insufficient technical and administrative support from the school.

Odiney Alvarez‐Campos, Gregory K. Evanylo · Journal of Environmental Quality · Global

The impacts of exceptional quality (EQ) biosolids and inorganic fertilizer applied for rehabilitating anthropogenic soils on potential nitrogen (N) and phosphorus (P) water quality impairment risk were compared. After two years, reclamation rates of biosolids resulted in soil P saturation ratios greater than the recommended 30% but lower than the 65% limit. While nitrate N (NO3–N) posed the greatest nutrient leaching risk, lysimeter-collected mass loading of NO3–N from reclamation rates was not greater than for the inorganic fertilizer.

Setyo Parsudi · Berkala Ilmiah AGRIDEVINA · Indonesia (Surabaya)

This study in Surabaya, Indonesia, aimed to identify urban farming models, community motivations, and obstacles faced in implementing urban agriculture. The study found that the most common urban farming models were hydroponics, followed by verticulture, fisheries, and rooftop gardens. Community motivations primarily included increasing income, utilizing empty land, pursuing farming hobbies, and using green open spaces. The main obstacles faced by the community were plant pests, lack of capital for development, extreme weather, and insufficient experience and knowledge in urban agriculture.

Sofia Biffi, Cleandho Marcos de Souza, L. G. Firbank · Agriculture Ecosystems & Environment · United Kingdom

Seventeen urban food production sites of varying sizes in and around Leeds, UK, selected from an open-source database, were surveyed using pitfall traps to assess the abundance and diversity of epigeal invertebrates (beetles, springtails, and spiders) in relation to soil characteristics (organic carbon, moisture content, pH) and site area; soil productivity was assessed by growing radish (Raphanus sativus) under uniform conditions. The study found no correlation between epigeal invertebrate abundance or diversity and either site area or soil characteristics. The authors state this indicates there is, as yet, no evidence that urban food production sites are too small to draw on ecosystem services delivered by epigeal invertebrates.

Dan Yu, Dongyan Wang, Wenbo Li, Shuhan Liu, Yuanli Zhu, Wenjun Wu, Yongheng Zhou · Sustainability · China (Changchun)

This paper assessed the landscape ecological security (LES) of peri-urban cultivated land in Changchun City, China, at three time points, considering both cultivated and surrounding landscapes. Results showed that urbanization affected the peri-urban cultivated landscape, with metrics like patch density and edge density progressively increasing for cultivated land within 20 km of the urban center. This indicated elevated fragmentation and vulnerability, and the study concluded that decreased LES of cultivated land impedes sustainable peri-urban agriculture.

장인수, 서동주, 김홍석 · 지역연구 · South Korea

This study in South Korea explored ways to revitalize urban agriculture based on empirical analysis of experience and subjective perceptions, defining its main functions as enhancing ecological, landscape, and participation values. Survey results showed that exposure to urban agriculture information was higher in large cities, and participation experience was higher with larger residential spaces. While positive responses were high for urban agriculture's functions, negative responses were high regarding perceptions of the surrounding residential environment.

Joseph Chabi, Miracle C. Eziefule, Rebecca Pwalia, Joannitta Joannides, Dorothy Obuobi, Godwin Amlalo, Charlotte Addae, Alidu Iddrisu, Dominic Acquah-Baidoo, Samuel Akporh, Sampson Gbagba, Kwadwo K. Frempong, Melinda P. Hadi, Helen Pates Jamet, Samuel Dadzie · Advances in Entomology · Ghana

This study in Accra Metropolis, Ghana, compared Anopheles gambiae s.l. species composition and insecticide resistance between two vegetable-growing and two non-vegetable growing areas. All A. gambiae s.l. populations tested were resistant to five insecticides, with lower mortalities observed in vegetable-growing areas (e.g., 2.6% and 12.5% for deltamethrin) compared to non-vegetable areas (36.2% and 38.9%). Anopheles gambiae s.s. and Anopheles coluzzii were dominant in vegetable-growing areas. The findings indicate that urban agriculture contributes to the development of insecticide resistance, which needs consideration in vector control strategies.

Marek Kopacki, Krystyna Rysiak, Mariusz Szmaraga · Annales Horticulturae · Poland (Lublin)

This 2014 study near Lublin, Poland, evaluated the decorative qualities and health of Tithonia rotundifolia in urban plantings, including a botanical garden and allotment gardens. Observations at the end of the vegetation period revealed disease symptoms, and mycological analysis of dead plant parts identified isolates of fungi from eleven genera. Dominant and dangerous pathogenic genera, Alternaria alternata and Botrytis cinerea, were found to affect T. rotundifolia.

Miguel A. Altieri, Clara I. Nicholls · Agro Sur · Global

Although urban agriculture (UA) is estimated to provide 15-20% of global food, its significant contribution to city food self-sufficiency is questionable due to low yields in most existing urban farms. Agroecology can enhance UA's productive potential by offering key principles for designing diversified, productive, and resilient urban farms. This paper describes principles and practices for increasing soil quality and enhancing plant health.

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.

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.

Jennifer Wilhelm · University of New Hampshire Scholars Repository (University of New Hampshire at Manchester) · United States (New Hampshire)

This dissertation addresses agricultural extensification from several angles. Chapter 1's literature review showed an increase in research on urban and peri-urban agriculture (UPA) and ecosystem services, but highlighted a need for quantifying ecosystem services and functions to clarify ecological tradeoffs. Subsequent chapters focused on a mixed-methods study in New Hampshire, surveying approximately 600 residents (494 general population, 103 food system stakeholders) on their perception of forestland conversion to agriculture.

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.

Monika Egerer, Alessandro Ossola, Brenda B. Lin · BioScience · United States (California central coast)

This study conceptualizes community garden soils within the novel ecosystem framework, arguing that gardeners cultivate novel agroecosystems from their garden beds' soil. On the California central coast, community garden soils may not be influenced by land-use legacies associated with geographic location. Instead, intensive soil reworking by gardeners can wash out legacy signals and decadal chronological trends, leading to soil homogenization that reduces biophysical ties to the underlying earth.

S. S. Horowitz, Liu JuanJuan Liu JuanJuan · CABI eBooks · China (Wuhan)

This chapter, focusing on a case study of intra-urban agriculture in Wuhan, China, mapped the dynamic relations between actors, institutions, processes, and spaces. Theoretical and practical challenges to growing food within Chinese cities were identified, and ways for state and non-state actors to collaborate in reassembling intra-urban agriculture to maximize its social, ecological, and economic contributions were suggested.

Alexandra Rizhinashvili · Digital Library of the Belarusian State University (Belarusian State University) · Global

This study analyzed the key limnetic parameters of four small shallow lakes: two located in allotment garden areas and two in forest-covered areas. It found that lakes with largely unexploited catchments contain a "hidden" source of nutrient load, primarily phosphates. Furthermore, lakes with catchments occupied by allotment gardens exhibited intensive overgrowth by floating vegetation.

J. Scott MacIvor, Laurence Packer · PLoS ONE · Global

This study modeled the occupancy probability of six solitary bee species using nest boxes set along an urbanization gradient over three consecutive years. Native M. pugnata showed decreased occupancy with increasing building footprint, and a similar but not significant pattern was found for native O. pumila. Conversely, introduced M. rotundata and M. centuncularis, along with native M. campanulae, exhibited increased occupancy with rising urbanization.

Ana Cristina Torres, Anne Caroline Prévot, Sophie Nadot · Letras Verdes Revista Latinoamericana de Estudios Socioambientales · France (Paris)

A study of 9 Parisian community gardens revealed the limitations of the dominant approach in conservation sciences and urban planning, which seeks to halt environmental deterioration by establishing an ethical basis of attitudes deemed appropriate for conserving a particular nature, by limiting human-nature interaction. Considering citizen subjectivities, the study offers perspectives to nourish conservation sciences and rethink cities.

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.

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.

· 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.

Kyung-chan Min, Jee-young Kim, yong-hoon Son · Institutional Repositories DataBase (IRDB) · South Korea

A study in Gwanak-gu, Seoul, South Korea, investigated 45 spontaneous agricultural lands, primarily around Mt. Gwanak, which often present risks like disaster, pollution, and landscape degradation. Using GIS, satellite images, field surveys, and interviews, the study classified these lands into six types. Three types were well-managed, while three types were in poor condition, indicating governance challenges. The research discusses the causes of these conditions and explores the potential for these lands to become community open spaces.

Guy M. Robinson, Zhiling Liu · AIMS environmental science · Australia

This paper examines the contradictions between greening and "ungreening" in Adelaide, South Australia, focusing on the city's Park Lands and urban sprawl. It argues that urban sprawl, including recent development on prime farmland, has been antithetical to biodiversity maintenance and greening principles, reducing sustainability capacity. The paper identifies problems such as conflict between biodiversity and protecting residents in bushfire risk areas, stemming from a relaxed attitude towards low-density expansion.