Research & reports

Rachel Bechtold, Catherine W. Shoulders, Jennie Popp, Donald M. Johnson, Lisa S. Wood · Natural sciences education · United States

This study evaluated the process and efficacy of installing a demonstration plot along a multiuse trail in Southeast Kansas to educate the community on rehabilitative plots. The greatest perceived challenges for this case study were the allotment of time and money for initial costs of the demonstration plot and addressing methodology for plant blindness in viewers.

Mohd Zulkifli Muhammad, Mohd Zulkifli Muhammad, Reza Putra, Abdul Rahman, Ridho Hafis, Faizar Rianda · JURNAL HURRIAH Jurnal Evaluasi Pendidikan dan Penelitian · Indonesia

The A Bee Honey group in Gampong Alue Awe, Muara Dua subdistrict, implemented a pilot program for Trigona honey bee cultivation from August to November 2022. Despite its potential as an income source, honey supply does not consistently meet demand, and a lack of understanding regarding cultivation and economics reduces consumer interest. The community also does not fully comprehend the advantages and potential of trigona bee cultivation. Training was provided to educate the community on its potential as an alternative income source, resulting in five family heads joining the program.

Demet Ülkü Gülpınar Sekban, Duygu Akyol · Journal of Urban Planning and Development · Turkey (Trabzon)

This study examined the contribution of residential gardens to ecosystem services in Trabzon City, Turkey. It was determined that both spatial needs and ecosystem benefits can be met with the same Green Infrastructure (GI) elements, and landscape value is supported by GI elements such as edible gardens, pollinator gardens, rain gardens, biological ponds, and green roofs. GI elements combining vegetation and water landscape elements have a higher potential for ecosystem services. The study concluded that green areas of residential gardens should be planned and designed through a holistic GI-oriented approach based on the total building parcel.

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.

Prem José Vazhacharickal, K. S. Jagadish, G. Eswarappa · Agricultural Reviews · India (Bengaluru)

This outlook study reviewed honey bee diversity and the potential for integrating honey bees into urban agriculture and forests in Bengaluru, India. An urban forestry study in Bengaluru identified 374 plant species, with the highest diversity in parks (291 species). Most plant species provided good foraging sources for honey bees, including Apis indica, Apis dorsata, Apis florea, and Trigona iridipennis. The urban agro-ecosystem in Bengaluru was found to be suitable for beekeeping, particularly for stingless bees.

Aaron Anderson, Lucas Costner, Lincoln R. Best, Gail Langellotto · Conservation Science and Practice · United States

This study compared the attractiveness of 23 native Pacific Northwest plant species to bees over three field seasons, using timed bee counts and vacuum sampling. It found that Douglas' aster, California poppy, varileaf phacelia, Canada goldenrod, farewell-to-spring, globe gilia, and Oregon sunshine consistently supported high bee abundance and species richness. These findings can inform urban pollinator conservation efforts in gardens and public spaces.

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.

Gabriel Marcacci, Ingo Graß, Vikas S. Rao, Shabarish Kumar S., K. B. Tharini, Vasuki V. Belavadi, Nils Nölke, Teja Tscharntke, Catrin Westphal · Ecological Applications · India

This study sampled bees across three seasons in 36 conventionally managed vegetable farms along an urbanization gradient in Bengaluru, a tropical megacity in India, to assess how urbanization affects the functional diversity of farmland pollinators. Functional responses were trait-specific: larger, solitary, cavity-nesting, and specialist bees benefited from urbanization, while ground-nesting bees increased in urban areas, in contrast to patterns seen in temperate cities. However, overall bee abundance and the abundance of social bees (85% of all bees sampled) decreased with urbanization, which the study identifies as a threat to crop pollination. Crop diversity promoted taxonomic and functional diversity, flower resources promoted abundance, and exotic plants decreased functional diversity and bee specialization. The authors recommend preserving semi-natural vegetation such as hedges, diversifying crops, maintaining native vegetation along field margins, and controlling invasive exotic plants.

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.

Monika Egerer · Renewable Agriculture and Food Systems · Germany

Researchers documented Lasioglossum limbellum, a bee species not previously recorded in the Berlin, Germany region, in a community garden built on concrete slabs and planted with annual and perennial vegetation. The species nests in cavities in soft rock cliffs, a habitat that does not functionally exist in urban areas, making its presence in the garden notable; the report presents the discovery as a basis for further research on wild-bee diversity and distribution changes in urban areas.

Renner S., Graf M., Hentschel Z., Krause H., Fleischmann A. · Oecologia · Germany (Munich)

Observed flower visitation on 29 plant species in a large Munich urban garden, finding that higher honeybee densities correlated with a significant shift from wild-bee to honeybee visits.

Sponsler D. B. · People and Nature · Global (review)

A socioecological perspective on urban apiculture examining whether urban beekeeping serves cities, bees, or beekeepers, and its implications for wild pollinator conservation and management.

Sarah Taylor Lovell, John Taylor · · Global

This paper discusses urban agroforestry (UAF) as a strategy to integrate fruit and nut production into urban settings, emphasizing the inclusion of agroecological principles for improved design. It suggests that UAF can be intentionally integrated into urban landscapes, considering synergies with adjacent land uses. Guidelines for planting design can draw from multi-strata systems found in permaculture and food forest literature.

Fernanda Rodrigues Vieira, Daniel Caixeta Andrade, Francis Lee Ribeiro · Revista Ibero-Americana de Ciências Ambientais · Global

This systematic review analyzed 45 publications from Web of Science up to September 2020 to examine the benefits of bee pollination through the Ecosystem Services Approach. The review found a significant increase in publications over the last two decades, with 84.44% associating pollination with rural agricultural productivity, 8.88% with wild plant reproduction, and 6.66% with urban agriculture. Only 7 of the 45 studies conducted economic valuation of pollination.

Ulrike Sturm, Tanja M. Straka, Alexandra Moormann, Monika Egerer · Insects · Germany (Berlin)

This study surveyed 111 community gardeners in Berlin and Munich, Germany, to understand the socio-psychological factors predicting pro-pollinator behavior. Using generalized linear models, the analysis revealed that gardeners who were fascinated by pollinators, held positive attitudes, and felt joy about seeing them reported intentions to protect or support pollinators. This suggests that fascination and joy can be harnessed for pollinator research and conservation efforts.

Rachel A. Brant, Gerardo R. Camilo · Insects · United States (Chicago)

Body size variation in female Halictus ligatus sweat bees collected from Chicago, Detroit, and Saint Louis between May and October 2016 was compared. Head width and intertegular distance were measured in bees collected from community gardens and urban farms. ANCOVA analysis indicated significantly different body size ranges across the three cities, and temperature also had a significant influence on body size.

Rachel Wilson · Science and Children · United States

As part of a school garden project, second graders in the United States participated in integrated lessons exploring ladybug life cycles, culminating in the release of beneficial insects in our school garden. The unit aimed to connect life cycle concepts to a new organism, using a 5E format and integrating language arts activities. This approach met both science content objectives and English Language Arts standards.

Kit Prendergast, Amelie M. Vanderstock, Heather Neilly, Catherine E. Ross, Vanessa Pirotta, Patrick Tegart · Austral Ecology · Australia

A reflection on a citizen science project in which five early-career and PhD female researchers guided school-age children across five schools to build artificial flowers, install them on school ovals, and record over repeated 10-minute observations how flower colour (yellow vs. blue) and configuration (isolated, clumped adjacent, clumped mixed-colour, clumped single-colour) affected the number and taxa of visiting insects. The project achieved a low-cost, engaging format and exposure to female STEM role models, but the authors report constraints including having to run it in a season made suboptimal by fixed school curricula, confounding of results caused by the children's own observations, and an inability to verify the collected data.

Becky Griffin, S. K. Braman · Journal of Entomological Science · United States

In 2017 and 2018, gardeners at 36 locations across 21 Georgia counties, United States, volunteered for the Georgia Pollinator Census pilot project, counting insects in September and October on an aster species and one other participant-chosen plant species (28 plant taxa were selected in total) while also receiving training in insect identification. Bumble bees, honey bees and wasps were sighted more often in rural areas, while carpenter bees, flies and other insects were sighted more often in urban areas; participants also showed increased entomological interest and insect knowledge, and the pilot's results were used to refine criteria for a larger, state-wide census.

Theodorou P., Radzevičiūtė R., Lentendu G., Kahnt B., Husemann M., Bleidorn C., Settele J., Schweiger O., Grosse I., Wubet T., Murray T.E., Paxton R.J. · Nature Communications, 11:576 · Germany

A replicated experiment contrasting Central European cities with neighbouring rural sites, finding cities have lower overall insect richness (e.g. flies, butterflies) but higher bee species richness, flower-visitation rates and pollination than the countryside. It shows urban floral resources support bees while cautioning that not all insects benefit, informing the design of pollinator conservation in urban green spaces and gardens.

Amado De Santis A. A., Chacoff N. P. · Neotropical Entomology · Yungas, Argentina

Analysing citizen-science plant-flower-visitor interaction data along an urbanization gradient in the northern Argentinian Yungas, the study found urbanization alters community composition rather than species richness of flower visitors.

Elizabeth Nicholls, Adrian Ely, Linda Birkin, Parthiba Basu, Dave Goulson · Sustainability Science · United Kingdom (Brighton and Hove)

A review and case study in Brighton and Hove, UK, examined the contribution of small-scale urban and peri-urban agriculture to sustainable food production. Findings showed these small, labor-intensive systems with high crop diversity can be highly productive, offering environmental and social advantages over industrial agriculture through minimal synthetic inputs and local consumption. However, significant knowledge gaps persist regarding productivity, economic impacts, pesticide use, and biodiversity implications.

Kit Prendergast · Pacific Conservation Biology · Australia

The African carder bee, Pseudoanthidium (Immanthidium) repetitum, first recorded in Queensland in 2000, has now been found in Western Australia, marking a significant distribution expansion. Three confirmed and one unconfirmed localities were identified in the Mandurah region, with abundant female specimens observed in one garden. The presence of this introduced species necessitates vigilance due to known negative impacts on native fauna and flora.

Brandon García Rodríguez, José Andrés Martínez Machado, Reinier Lop Herrera, Reina Dayamí Reyna Reyes · Revista Científica Agroecosistemas · Cuba (Cienfuegos)

A study on the use of Meliponinos was conducted in two meliponarios in Cienfuegos province, Cuba, specifically in San Fernando de Camarones and Pueblo Nuevo. Interviews with bee owners and community members identified factors affecting the sustainable development of Meliponicultura within Urban, Suburban, and Family Agriculture systems. Findings indicated a tendency for the Melipona beecheii population to increase in both municipalities, and common factors affecting bees were identified.