Research & reports

Kelley AT, Boger R · EcoHealth · 米国・ニューヨーク市ブルックリン

A survey of mosquito larval abundance and genera across 22 community gardens in Brooklyn, New York. The authors frame these gardens as social spaces providing food sovereignty to many New Yorkers, while the arrival of Aedes albopictus and the longtime presence of Culex pipiens make socialising in them more dangerous — Ae. albopictus is associated with dengue, Zika and chikungunya, and Cx. pipiens is a longstanding West Nile virus vector. Because both breed in human-made plastic containers, knowing their preferred container types and locations can inform gardeners' best management practices. Non-purposeful container types and lower total volumes of water were significant predictors of higher mosquito densities, though these variables did not predict egg-laying preference.

Bauer W., Titz A. · Nature-Based Solutions · Malawi (Lilongwe)

Urban Nature-based Solutions (NbS) are promoted globally as multifunctional and cost-effective, and municipal interest is growing in cities of the so-called Global South. Yet research remains clearly biased toward the Global North, with particularly few studies on cities in Sub-Saharan Africa — leaving a high risk that maladapted NbS, modelled on examples from elsewhere that do not meet local requirements, get adopted. This article examines the barriers to adopting urban NbS in Malawi's cities and the opportunities for successful implementation, drawing on qualitative data (workshops, narrative expert interviews, group discussions) gathered over five research stays in Lilongwe between 2022 and 2024, and analysing in detail the strategies used by those implementing the Lilongwe Ecological Corridor Initiative (LECI), a large-scale NbS in the capital.

Saputra A., Abdoellah O., Utama G., Wulandari I., Mulyanto D., Suparman Y. · Sustainability · Indonesia

Interviews and a survey examined how residents of Bandung perceive the ecosystem services of homegarden-based urban agriculture. Residents themselves judged the gardens' contribution to overall food security to be only supplementary, even though they supply fresh produce. Their value was widely recognised elsewhere: biodiversity conservation, microclimate regulation, disaster risk reduction, social cohesion and mental well-being. Limited space, lack of knowledge and competing land uses emerged as the barriers, and the authors conclude that education and policy support are the levers for wider uptake.

Ricard Segura, Johannes Langemeyer, Alba Badía, Sergi Ventura, Jaime Vila-Traver, Gara Villalba · The Science of The Total Environment · Spain (Barcelona)

A study in the Metropolitan Area of Barcelona, Spain, investigated the impacts of peri-urban agricultural expansion on the food-water-climate nexus using urban metabolism and atmospheric-biosphere models across four land-use scenarios. While expansion increased food production and irrigation water requirements, replacing natural non-forested and forest areas for peri-urban agriculture was predicted to reduce net ecosystem productivity by up to 18.5% and total carbon stocks by 3.3%. Irrigated peri-urban agriculture potentially reduced near-surface temperatures by 0.7°C, though reductions in the densest urban areas were minimal.

Pierric Calenge, Maie Gérardot · Métropolitiques · United States (Cleveland)

The work by Max Rousseau and Vincent Béal illuminates the ambiguities of a policy that organizes urban decline and racial segregation in Cleveland. This policy promotes urban degrowth and racial segregation, balancing algorithmic management and urban greening. The study focuses on the Rust Belt region, which experiences de-urbanization marked by the subprime crisis, racism, and segregation.

Cecil C. Konijnendijk · Edward Elgar Publishing eBooks · Global

This chapter examines the diverse uses of urban green spaces, encompassing recreation, biodiversity conservation, public health, and regulatory ecosystem services, with food production also re-emerging. Changing urban populations, including cultural diversity and ageing, have altered demands and uses. The study identifies a critical need to manage potential conflicts and trade-offs among these varied demands, despite many uses being able to coexist.

Anjoulie Brandner, Karolina Taczanowska, Brenda Maria Zoderer, Christoph Schunko · Urban forestry & urban greening · Austria (Vienna)

A survey of 458 respondents in Vienna, Austria, analyzed urban wild food foraging locations and preferences for urban green spaces (UGS). 1239 foraging locations were identified across 9 UGS types, with forest and meadow landscapes, parks, and UGS mosaics being most utilized. Foragers' major concerns were contamination from traffic and dogs.

Jeffrey Chiwuikem Chiaka, Gengyuan Liu, Hui Li, Wen Zhang, Mingwan Wu, Zhaoman Huo, F. Gonella · Environmental and Sustainability Indicators · Sub-Saharan Africa

This study evaluated land cover change and its drivers using spatial and statistical analysis in 22 designated protected areas (PAs) across the tropical coastal regions of sub-Saharan Africa. Results indicated that food production is prevalent in these protected areas regardless of their designation, and forest loss occurred in most PAs, suggesting weak conservation. Population density was the most significant driver of land cover change, and only 15 out of 22 protected areas showed an increase in their total ecosystem service value.

Mitchell McLarnon · · Global

This chapter describes the practice, processes, and ethical tensions of using cell phones for visual data collection, representation, and analysis in school/community garden research projects. The findings suggest that while gardens and cell phones have the potential for enhancing experiential learning, increased well-being, and ecological awareness, their use needs to be highly contextualized within critical discussions related to settler colonialism, consumerism, neoliberalism, and (green) gentrification.

Rafi Pratama, Wawan Dhewanto · International Research Journal of Economics and Management Studies · Indonesia (Bandung)

This mixed-methods study assessed the effectiveness of the Micro Urban Food Forest Campaign at Masagi Koffee, Bandung, Indonesia, in enhancing environmental sustainability and community involvement. While the initiative moderately succeeded in raising environmental awareness among participants, it faced problems in achieving consistent community participation. Logistic regression analysis identified awareness and knowledge as significant predictors of sustainability practice, indicating a need for targeted strategies to foster behavioral change.

Diana Elinos, M. Carolina Cruz, Andrea Loyo del Castillo, Mar Zamora, Grecia Karime Yebra Peralta, José Gabriel Reyes Fernández · Memorias del Concurso Lasallista de Investigación Desarrollo e innovación · Global

This study analyzed the impact of inorganic pesticides, highlighting their potential mutagenic and carcinogenic effects and negative impact on biodiversity, water, and soil contamination. It proposed a methodology for creating an organic pesticide and presented results on its efficacy in pest control. The study concluded that inorganic pesticides pose significant risks, while organic pesticides offer a safe and effective alternative, and emphasized the need to prioritize organic solutions in agriculture.

Yannick Useni Sikuzani, Bernard Kisangani Kalonda, Médard Mpanda Mukenza, Jonas Yona Mleci, Alex Mpibwe Kalenga, François Malaisse, Jan Bogaert · Ecologies · DR Congo (Lubumbashi)

This study analyzed the spatial structure, plant diversity, propagation strategies, and ecological functions of domestic gardens across three distinct neighborhoods—planned, unplanned, and residential—in Lubumbashi, DR Congo. The study identified 232 taxa across 68 families, with exotic species predominating in all neighborhoods (80%), especially in unplanned areas (82.25%). This dominance of exotic species highlights a potential for ecological imbalances and emphasizes the strong human influence on domestic gardens in Lubumbashi.

Hao Yang, Runyan Zou, Yueming Hu, Lu Wang, Yingkai Xie, Zhengxi Tan, Zhiqiang Zhu, A‐Xing Zhu, Jianzhou Gong, Xiaoyun Mao · Land Use Policy · China

This study introduced an "element coupling-function synergy" analytical framework and constructed a causal Bayesian belief network to identify trade-offs and synergies among multiple functions of cultivated land resources in Guangdong, China. The findings revealed trade-offs between food cleanliness and food production/social security. Synergistic relationships were found among food production, social security, and ecological regulation, as well as among ecological regulation, habitat maintenance, and landscape culture. The study divided the area into eight functional zones and formulated multi-objective management plans.

Margaretha Häggström, Mårten Häggström · The Trumpeter · Sweden

This four-year exploratory study in a clearcut in western Sweden investigated the feasibility of cultivating crops in a nutrient-poor, shadowless environment to support biodiversity. The study found that while it was possible to grow potatoes, peas, and some summer flowers without special efforts, it was difficult to grow other vegetables and root vegetables. The project suggests that planting activities in clearcuts may impact people's sense of human-nature identity and respect for the natural environment.

Roberta Bulgari, Erdona Demiraj, Calogero Schillaci, Ahlem Tlili, Yushu Xia · Urban Agriculture & Regional Food Systems · Global

This special issue examines urban and peri-urban soil and plant management, highlighting that soil-related factors in urban agricultural systems pose unique challenges. Issues such as soil fertility, soil biodiversity, and soil contamination require further investigation to enhance urban agriculture's contribution to livability. The issue collects studies supporting sustainable soil management and crop diversification, and explores remote sensing and deep learning for soil health monitoring and plant disease detection related to contamination.

YUDHA LESMANA, Sambas Basuni, Rinekso Soekmadi · Biodiversitas Journal of Biological Diversity · Indonesia

This qualitative study in the Batang Toru Landscape, North Sumatra, Indonesia, investigated human-orangutan conflict arising from forest clearing for economic development. It found that Tapanuli orangutans migrate to community gardens, leading to crop destruction and decreased economic income for local communities, thus triggering conflict. The study suggests that the concept of ecosophy, integrating intellectual, spiritual, and emotional dimensions, can raise public awareness for orangutan protection, with higher education levels showing more positive results, but highlights the economic viability challenge for communities.

Administrative Region of Central, Thessaloniki, Greece, K.I. Maknea, Nikolaos Thymakis, Julia Nerantzia Tzortzi, A. Asănică · Romanian journal of Horticulture · Greece

Experimental research at eight sites in Thessaloniki, Greece, evaluated the impact of aromatic and medicinal plants on the urban microclimate. Sites with these plants showed a 10-15% temperature reduction compared to non-planted areas, and potted plants on simulated balconies led to a 5-10% temperature reduction. However, areas with dense vegetation and water features exhibited increased humidity and limited air circulation, creating adverse thermal comfort conditions.

Catherine Oliver · Transactions of the Institute of British Geographers · United Kingdom (London)

This paper examines urban chicken-keeping in London, where urban spaces are transformed to accommodate chickens. It argues that the human-imposed design of urban barnyards is often impractical for chickens, leading to lawns being torn up, plants demolished, and vegetable patches consumed. Additionally, chickens are vulnerable to local foxes, highlighting that chickens' behaviors and territoriality often overflow their assigned space, challenging human design intentions.

Alexandra Zink, Paul J. CaraDonna, Kelly Larsen, Amy M. Iler · Ecosphere · United States (Chicago)

This study investigated how urbanization relates to pollination by growing 240 plants (squash and tomato) across six sites with varying urbanization levels in Chicago, Illinois. For tomatoes, the magnitude of pollen limitation increased with greater impervious surface, indicating more pronounced pollination deficits at highly urbanized sites. For squash, evidence of pollen limitation was found only at the most urban site, with a weak trend of pollen limitation of fruit set (but not seed set) increasing with impervious surface.

Francesco Orsini, Giuseppina Pennisi, Giorgio Gianquinto, Michael Martin · International Journal of Vegetable Science · Global

This paper argues that widely publicized figures on urban agriculture's environmental impacts lack the methodologically sound evidence needed for valid comparison, before conclusions can be drawn. It addresses problems in comparatively assessing environmental performance between rural and urban farming and argues for the need for specifically designed indicators capable of comprehensively assessing multifunctional urban agriculture.

Setyardi Pratika Mulya, Heru Purboyo Hidayat Putro, Delik Hudalah · Geography and sustainability · Global

This 2023 global systematic literature review examined peri-urban agriculture (PUA) as an ecosystem service, focusing on urbanization pressures and governance. The review found that PUA is crucial for urban areas in terms of food supply, ecology, biodiversity preservation, disaster mitigation, and recreation. However, massive urban expansion is a primary cause of PUA loss, and sociocultural biases have led to institutional constraints on peri-urban management within existing political and regulatory frameworks.

Andrés G. Rolhauser, J. Scott MacIvor, Adriano N. Roberto, Selena Ahmed, Marney E. Isaac · Ecological Solutions and Evidence · Global

This paper addresses the limited understanding of conditions under which stress-tolerant "nurse" plants can facilitate stress-intolerant "protégé" species on extensive green roofs for urban agriculture. It proposes a framework and linear model, integrating trait–environment theory and facilitation ecology, to make testable predictions on protégé species performance along stress gradients. The framework aims to help researchers assess the feasibility of nurse–protégé interactions under various environmental conditions.

Pengyao Li, Feinan Lyu, Yuan Zhou, Zhenrong Yu · Ecological Indicators · China (Beijing)

A study in Beijing, China, surveyed ground spiders and carabids in 12 plantation forests and nearby arable lands to assess the impact of afforestation on biodiversity. Intensive afforestation on arable lands did not increase local ground arthropod diversity. Ground arthropod abundance and species richness in plantation forests were significantly lower than in arable lands when surrounding arable land cover was relatively high, and overall landscape-scale diversity was not improved.

Tinashe P. Kanosvamhira · Urban Forum · South Africa

This narrative literature review analyzed 62 peer-reviewed articles on urban agriculture in South Africa from 1993 to 2022. The findings indicate several knowledge gaps, including an under-representation of secondary cities and a general productivist focus in most studies, which limit understanding of urban agriculture for sustainable cities.

Claudia Rochael Oliveira, Eneida Maria Souza Mendonça · Geografia (Rio Claro) · Global

This article aimed to map authors discussing environmental aesthetics in urban agriculture research, inspired by Porteous's work. Using a bibliographic survey and visual representations, the study found no publications intersecting urban agriculture and environmental aesthetics. Research on urban agriculture and landscape was notably greater than on urban agriculture and aesthetics, and studies applying aesthetic theory to urban agriculture were very limited, especially in high-tech contexts like vertical farms.