Research & reports

Jennifer Roedel, Karma Thomas, Zsofia Szendrei · Renewable Agriculture and Food Systems · United States

This study surveyed 74 urban growers to evaluate how grower and farm characteristics influence the implementation of eight common pollinator management strategies and overall farm crop richness. It found that demographic variables had no impact; instead, growers' decisions were shaped most by their sources of educational information and by resource use and accessibility, with online materials appearing more effective than hard-copy formats. The authors conclude that more accessible educational resources are needed for these historically underserved urban growers.

· BMC Ecology and Evolution · Germany (Berlin, Munich)

In collaboration with 73 gardeners across 22 gardens in Berlin and Munich, measured fruit set of 150 crops to examine how bee diversity and urbanization affect pollination services, using a citizen science approach.

Nicholls · Plants, People, Planet · Global

Addresses knowledge gaps in pollination needs for urban farming by developing citizen science methodology for monitoring plant-pollinator interactions. Found similarities between grower-collected and professional researcher data on most/least attractive crops to pollinators, but identified significant discrepancies highlighting limitations of grower-only data collection.

Willams Oliveira, Marcelo Tabarelli, Leonardo Galetto, Carlos A. Peres, Ariadna Valentina Lopes · Human Ecology · Global

This review provides an overview of published research on plant-pollinator interactions among food plants in urban agriculture worldwide, offering a critical summary of the spatiotemporal distribution of knowledge, urban plant-pollinator profiles, and research funding for urban agriculture and ecosystem services. It highlights the potential of urban agriculture to create pollinator-friendly spaces that support local pollinator conservation and concludes that pollination services are a promising nature-based solution to meet Sustainable Development Goals (SDGs).

Edith Gonzales, Brenda B. Lin, Heidi Liere, Shalene Jha, Stacy M. Philpott · Figshare · United States (California)

An online survey of community gardeners in California, United States, assessed their knowledge of arthropod ecological roles. Gardeners demonstrated high knowledge, correctly classifying 71–83% of arthropod images. Female gardeners more accurately classified pollinators, while those who participated in a Master Gardener program more accurately classified herbivores and natural enemies.

Stefan Jarau · International explorations in outdoor and environmental education · Global

This chapter introduces the co-evolution of flowering plants and pollinating animals, highlighting their adaptations and the challenges of observing these interactions in human-made environments. It suggests that school gardens can serve as important sites for biodiversity conservation by providing habitats for diverse flowering plants and pollinators. Additionally, school gardens can engage students, fostering their interest and motivation to study natural wonders, and the chapter offers suggestions for promoting plant and pollinator diversity and using these interactions for educational purposes.

Domenico Prisa, Martino Campanile · EPRA International Journal of Agriculture and Rural Economic Research · Global

This controlled pot experiment evaluated chabazitic zeolite as a soil amendment for Crassula cv. Frosty, monitoring plant growth, physiological indicators, and nectar characteristics over a growing cycle. Zeolite-amended substrates significantly improved water retention, nutrient availability, vegetative growth, chlorophyll content, and water use efficiency. Zeolite-treated plants showed significantly greater flowering intensity, increased nectar volume, and higher sugar concentration, leading to higher bee visitation rates.

Della Rocca Francesca, Musiani Marco, Taioli Domitilla, Nardelli Edoardo, Milanesi Pietro · Biodiversity and Conservation · Italy (Bologna)

In Bologna, Italy, data on bird and butterfly communities were analyzed across an anthropogenic disturbance gradient encompassing urban, agricultural, and semi-natural contexts. The study found the highest species richness and diversity in peri-urban areas with natural and semi-natural habitats, while dense built-up areas supported fewer, mostly generalist species. Agricultural areas favored birds but not butterflies, and continuous urban cover, discontinuous high-density urban areas, distance to streets, and wood coverage were identified as main drivers of diversity.

Marcia Eugenio-Gozalbo, Inés Ortega-Cubero, Rafael Suárez-López · International explorations in outdoor and environmental education · Spain (Soria)

This chapter describes an educational project conducted with 8-year-old children in the Organic Learning Garden of the Faculty of Education of Soria, University of Valladolid, Spain. The project aimed to promote detailed observation and learning about insect morphology and diversity through scientific drawing. The use of school gardens is proposed to foster children's knowledge and appreciation of insect biodiversity.

Dagmar Haase, Dara V. Gaeva · Plant-Environment Interactions · Germany (Berlin)

An exploratory study conducted in allotment gardens in Berlin, Germany, from May to July 2019, investigated plant species richness and ecosystem services, particularly pollinator habitats and local food provision. Comparing 10 plots with varying management intensities, 376 plant species were identified. The study found that native species richness, weedy plant species richness, and the richness of species contributing to regulation and maintenance ecosystem services were significantly negatively correlated with garden management intensity. Urban allotments support pollinator populations due to a wide variety of nectar-producing plants, but this capacity is greatly affected by local gardener management.

Kulesh Bhandari · Open MIND · India

This first entry in a species documentation series on wild food forests in tribal Jharkhand, India, part of a Pollination Project-funded initiative, presents a field-based profile of Clerodendrum viscosum, a shrub of the Santhal Pargana uplands, recorded on a semi-open granite-laterite rise at 210 m elevation under conditions of 27°C, 30% relative humidity, a 15°C night low and wind gusts to about 35 kph. The profile documents microhabitat characteristics, morphology (bud, calyx, corolla, stamens), ethnobotanical use among Santhal-Paharia communities, and the species' ecological role as a pollinator-supporting, upland-stabilizing plant.

Subin Babu Neupane, Pedro F S Toledo, Katerina Velasco-Graham, Felipe N. Soto‐Adames, Arash Kheirodin · Journal of Integrated Pest Management · United States

This is the first report documenting the invasive thrips species Thrips parvispinus, native to Southeast Asia, in Texas, USA. Samples collected from 12 locations across Texas -- including greenhouse facilities, large retail outlets and community gardens -- from plants showing foliage injury confirmed the species' presence in November 2025, and detections across multiple counties suggest it has been introduced to multiple locations and may be widely distributed in the state.

Sonia, Malti, Lavi Sharma · Journal of Science Innovations and Nature of Earth · India

A bird community survey around the town border and surrounding agricultural land of Baraut, Baghpat District, western Uttar Pradesh, India, used point-count arrays and random line transects across four habitat types: agricultural, woodland/orchard, urban and wetland. After filtering out domesticated livestock and urban feral populations from 21 field surveys, the study identified 16 "true wild" bird species spanning 10 orders and 15 families, with Passeriformes dominant at 43.75% (n=7) while the other nine orders each accounted for 6.25% (n=1) with no species shared across them. Foraging guild composition was 37.50% generalist omnivores (n=6), 26.25% carnivores (n=4), 18.75% insectivores (n=3), 12.50% frugivores (n=2) and 6.25% granivores (n=1). Habitat affinity was highest for agricultural farmland (37.50%, n=6), followed by woodland/orchard (25.00%, n=4), with urban and wetland tied at 18.75% (n=3) each. All species recorded are classified as Least Concern on the IUCN Red List.

Isabelle van der Zanden, Lieke Moereels, Stephanie Schelfhout, Pallieter De Smedt, Koen Lock, Wouter Dekoninck, G.W. Korthals, Wim H. van der Putten, Kris Verheyen, G. F. Veen · npj Biodiversity · Global

Communities of 12 taxonomic groups of soil organisms were compared between 15 food forests and nearby grasslands, croplands and forests in Northwest Europe. Food forest soil communities differed from grassland and cropland communities and more closely resembled forest communities in biomass and number of individuals for most taxonomic groups, with especially higher numbers of macroarthropods. In composition, food forest communities were overall intermediate between grassland/cropland and forest for most groups, but microorganismal and microfaunal groups more closely resembled grassland and cropland communities than forest communities. Alpha-diversity was higher for non-arbuscular mycorrhizal fungi and certain macroarthropod groups in food forests, though overall differences in alpha- and beta-diversity were limited. Planting food forests was concluded to be able to increase soil biodiversity in agricultural landscapes.

Ligia Tobar, César Augusto Gutiérrez, Leidy Yurani Villa García, Jonathan S. Pelegrin · Applied Environmental Education & Communication · Colombia

This study examined how a school garden in Vijes, Colombia, functions as a habitat for pollinators and a space for experiential education. Primary school students recorded 208 floral visits across four plots (ornamental, medicinal, fruit, and crop) over three weeks of limited observation time. Visiting activity was dominated by the stingless bee Tetragonisca angustula (49%) and the honeybee Apis mellifera (36%). Pollinators mainly visited the ornamental plot, particularly Zinnia peruviana, and Cucurbita maxima in the crop plot. Participation in the monitoring fostered ecological awareness, teamwork, and appreciation of biodiversity among the students.

Mary T Nguyen, Carleen Rauh, Shelby Gresch, Charlotte Correiro, Heidi Elmendorf, Adriane Fugh-Berman, Gina Wimp, Alexandra L. DeCandia · ODU Digital Commons (Old Dominion University) · United States

Plant, animal, bacterial and fungal diversity were examined across three distinct urban habitats — a turf lawn, a forb garden and a farming space — using bacterial 16S rRNA and fungal ITS2 sequencing, soil nutrient analyses, and vegetation and wildlife surveys. Bacterial community abundance was relatively even across garden types, but site-specific management style significantly shaped which fungal taxa dominated: Leotiomycetes in the farming space, Sordariomycetes in the forb garden, and Tremellomycetes in the turf lawn, indicating that distinct urban agricultural practices strongly shape fungal communities. Gardens with greater plant diversity also supported higher wildlife and fungal richness.

Nicholas Balfour, Johnstone Caitlyn, Emma Bush · Zenodo (CERN European Organization for Nuclear Research) · United Kingdom

A 2025 survey of 31 green spaces in central Edinburgh, UK, including allotments, public gardens, cemeteries and roof gardens, assessed pollinator diversity and resource availability. The pollinator community was a generalist assemblage dominated by bumble bees (45%) and honey bees (26%), while butterflies, moths and beetles were notably scarce. Semi-natural areas, allotments and cemeteries sustained the highest pollinator diversity, linked to native vegetation and rich floral resources. Two-thirds of the plant species recorded were non-native horticultural varieties, yet 87% of recorded plants were visited by pollinators, and the three plant species attracting the widest range of pollinator taxa were all indigenous.

· Wikipedia (ja) · Japan

The Ginza Honeybee Project began on March 28, 2006, keeping Western and Japanese honeybees on Ginza building rooftops, producing and selling honey-based sweets, cocktails, and soap, greening over 1,000 sqm of rooftop space, and providing environmental education to local kindergartens and schools. Honey production grew from 150 kg in 2006 to 800 kg in 2009, and an agricultural production corporation, Ginza Mitsubachi, was established in 2010.

Stichting DakAkker · Stichting DakAkker (official) · Netherlands

The official site of DakAkker, a rooftop farm on top of the Schieblock building in Rotterdam. It describes itself as a 1,000-square-meter rooftop farm growing vegetables, edible flowers, and fruit and keeping bees, calling itself the largest open-air rooftop farm in the Netherlands and one of the largest in Europe. It is presented as an initiative of ZUS (Zones Urbaines Sensibles) and the Rotterdam Environmental Centre together with Optigrün Benelux and binder daktuinen, framed as part of Rotterdam's first city initiative 'de Luchtsingel.' The roof also hosts 'Slimdak,' a test site for smart rainwater management. 'Dakennie,' its environmental education program for Rotterdam primary schools, is financially supported by Watersensitive Rotterdam, the City of Rotterdam's nature and environmental education division, and the Hoogheemraadschap Schieland en de Krimpenerwaard water authority. The page itself does not state an opening year, which could not be confirmed here.

ByBi · ByBi · Norway

An introduction to 'The Pollinator Passage', launched in 2015 by Oslo beekeeping organization ByBi with funding from the Norwegian Environment Agency, mobilizing citizens to create flowering 'stepping stones' across the city — from large flowering farming areas to balcony flower pots — to build urban pollinator habitat. Since its launch, Norway has adopted a National Pollinator Strategy, Oslo has established an Urban Agriculture Program and a roof/facade greening strategy, and ByBi now manages pollinator-friendly practices in the city's cemeteries and the three royal gardens of Oslo.

Plantlife · Plantlife · United Kingdom

An overview of Plantlife's 'No Mow May' campaign, urging people in the UK to stop mowing their lawns during May to let wildflowers grow and support bees and butterflies. The page states that approximately 97% of the UK's flower-rich meadows have been lost since the 1930s, and notes there are around 23 million gardens in the UK, meaning even small patches can add up. It encourages extending the practice beyond May into a year-round 'No Mow Movement' of managing lawns with mixed grass lengths for nature.

Buglife · Buglife · United Kingdom

An introduction to Buglife's 'B-Lines' initiative, which states that over 97% of the UK's flower-rich grasslands (an area the size of Wales) have been lost since the 1930s, and describes a nationwide network of flower-rich habitat 'stepping stones' linking existing wildlife areas across the countryside and towns. B-Lines have been mapped across England, Wales, Northern Ireland and Scotland, with a target to create and restore at least 150,000 hectares of flower-rich habitat across the UK.

Santropol Roulant · Santropol Roulant · Canada

Santropol Roulant's rooftop farm in Montreal's Plateau neighbourhood combines intensive garden beds with container gardening and keeps beehives. Produce grown there feeds the organization's meals-on-wheels kitchen, and kitchen scraps are composted in the basement and returned to the rooftop farm, forming a closed food-waste loop.

Domanus A., Smith A., Roberts M., Schnorenberg R., Doane M., Minor E. · Cities and the Environment (CATE), 17(2):9 · United States (Chicago)

A study of 24 community gardens in Chicago measuring not only cultivated crops but also spontaneous (wild/native) plants, birds, butterflies and bees. Gardens supported many spontaneous plant species (mean 8.4 per garden) alongside crops, which underpinned diverse fauna (18 bird species, 13 bee genera, 10 lepidopteran species). Socio-ecological drivers such as management type (allotment vs. communal) significantly shaped cultivated richness, the volume of spontaneous vegetation, and tree/shrub density — showing that how gardens are managed governs urban biodiversity.

Ranalli et al. · Journal of Applied Ecology · Global (urban ecosystems)

2025 research on how urban agriculture and urban planning enhance pollinator habitats in changing landscapes. Urban environments offer benefits to pollinator communities: lower pesticide use, greater variety of floral resources, and increased landscape heterogeneity. Urban agriculture serves as a pollinator reservoir and source area for adjacent rural regions, contributing to food security, poverty alleviation, and pollinator conservation.