CSI Pollen: Diversity of Honey Bee Collected Pollen Studied by Citizen Scientists

A diverse supply of pollen is an important factor for honey bee health, but information about the pollen diversity available to colonies at the landscape scale is largely missing. In this COLOSS study, beekeeper citizen scientists sampled and analyzed the diversity of pollen collected by honey bee colonies. As a simple measure of diversity, beekeepers determined the number of colors found in pollen samples that were collected in a coordinated and standardized way. Altogether, 750 beekeepers from 28 different regions from 24 countries participated in the two-year study and collected and analyzed almost 18,000 pollen samples. Pollen samples contained approximately six different colors in total throughout the sampling period, of which four colors were abundant. We ran generalized linear mixed models to test for possible effects of diverse factors such as collection, i.e., whether a minimum amount of pollen was collected or not, and habitat type on the number of colors found in pollen samples. To identify habitat effects on pollen diversity, beekeepers’ descriptions of the surrounding landscape and CORINE land cover classes were investigated in two different models, which both showed that both the total number and the rare number of colors in pollen samples were positively affected by ‘urban’ habitats or ‘artificial surfaces’, respectively. This citizen science study underlines the importance of the habitat for pollen diversity for bees and suggests higher diversity in urban areas.

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Characterisation of the UK honey bee (Apis mellifera) metagenome

10.1101/293647 ◽

2018 ◽

Cited By ~ 2

Author(s):

Tim Regan ◽

Mark W. Barnett ◽

Dominik R. Laetsch ◽

Stephen J. Bush ◽

David Wragg ◽

...

Keyword(s):

Apis Mellifera ◽

Honey Bee ◽

Honey Bees ◽

Molecular Ecology ◽

Emerging Pathogens ◽

Complex Product ◽

Bee Health ◽

Honey Bee Health ◽

The Uk ◽

Bee Colonies

AbstractThe European honey bee (Apis mellifera) plays a major role in pollination and food production, but is under threat from emerging pathogens and agro-environmental insults. As with other organisms, honey bee health is a complex product of environment, host genetics and associated microbes (commensal, opportunistic and pathogenic). Improved understanding of bee genetics and their molecular ecology can help manage modern challenges to bee health and production. Sampling bee and cobiont genomes, we characterised the metagenome of 19 honey bee colonies across Britain. Low heterozygosity was observed in bees from many Scottish colonies, sharing high similarity to the native dark bee, A. mellifera mellifera. Apiaries exhibited high diversity in the composition and relative abundance of individual microbiome taxa. Most non-bee sequences derived from known honey bee commensal bacteria or known pathogens, e.g. Lotmaria passim (Trypanosomatidae), and Nosema spp. (Microsporidia). However, DNA was also detected from numerous additional bacterial, plant (food source), protozoan and metazoan organisms. To classify sequences from cobionts lacking genomic information, we developed a novel network analysis approach clustering orphan contigs, allowing the identification of a pathogenic gregarine. Our analyses demonstrate the power of high-throughput, directed metagenomics in agroecosystems identifying potential threats to honey bees present in their microbiota.

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Total Brood Removal and Other Biotechniques for the Sustainable Control of Varroa Mites in Honey Bee Colonies: Economic Impact in Beekeeping Farm Case Studies in Northwestern Italy

Sustainability ◽

10.3390/su12062302 ◽

2020 ◽

Vol 12 (6) ◽

pp. 2302 ◽

Cited By ~ 3

Author(s):

Teresina Mancuso ◽

Luca Croce ◽

Monica Vercelli

Keyword(s):

Economic Impact ◽

Case Studies ◽

Honey Bee ◽

Complex Activity ◽

Land Protection ◽

Bee Health ◽

Honey Bee Health ◽

Varroa Mites ◽

Bee Disease ◽

Bee Colonies

Honey bee colonies are affected by many threats, and the Varroa mite represents one of the most important causes of honey bee disease. The control of the Varroa population is managed by different methods, and in recent years, biotechnical practices are considered preferable to chemical approaches in order to safeguard honey bee health and avoid residues in bee products as well as the appearance of acaricide resistance. However, little is known about the economic performance of beekeeping exploitations in relation to the methods used for tackling Varroa. This study aims to investigate the economic impact of total brood removal (TBR) as a biotechnique to keep Varroa mites under control, and compare this to other common biotechniques and chemical Varroa control in numerous Italian beekeeping case studies. A pool of economic and technical indexes was proposed. The proposed index pool can be included in the development of an expert system (such as a decision support system) able to address the optimal management of this very complex activity, which requires natural resources, land protection, capital and high technical skills. The result showed that the adoption of the TBR biotechnique vs. other biotechniques led to an increase in terms of total revenue (increase values ranging from 11% to 28%) even though more labor is needed (increase values ranging from 43 to 83 min/hive) and a loss of honey production could be recorded in some cases. Additionally, the total expenses, represented mainly by supplemental nutrition and treatments with oxalic acid, affected the economic results of the biotechnical practices. The use of biotechniques vs. chemical control resulted in decreased treatment costs and increased feeding costs. The advantages resulting from not using synthetic acaricides (which are dangerous for honey bee and human health as well as the environment) as well as the advantages linked to the production of new nuclei (which are involved in the maintenance of bee stock and counteract the decline in honey bee population) and pollination ecosystem services could make beekeeping farms more resilient over time.

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North American Prairie Is a Source of Pollen for Managed Honey Bees (Hymenoptera: Apidae)

Journal of Insect Science ◽

10.1093/jisesa/ieab001 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Ge Zhang ◽

Ashley L St. Clair ◽

Adam G Dolezal ◽

Amy L Toth ◽

Matthew E O’Neal

Keyword(s):

North America ◽

Honey Bee ◽

Honey Bees ◽

Crop Production ◽

Floral Resources ◽

European Settlement ◽

Bee Health ◽

Honey Bee Health ◽

Bee Colonies ◽

Prairie Plants

Abstract Prairie was a dominant habitat within large portions of North America before European settlement. Conversion of prairies to farmland resulted in the loss of a large proportion of native floral resources, contributing to the decline of native pollinator populations. Efforts to reconstruct prairie could provide honey bees (Apis mellifera) a source of much-needed forage, especially in regions dominated by crop production. To what extent honey bees, which were introduced to North America by European settlers, use plants native to prairies is unclear. We placed colonies with pollen traps within reconstructed prairies in central Iowa to determine which and how much pollen is collected from prairie plants. Honey bee colonies collected more pollen from nonnative than native plants during June and July. During August and September, honey bee colonies collected more pollen from plants native to prairies. Our results suggest that honey bees’ use of native prairie plants may depend upon the seasonality of both native and nonnative plants present in the landscape. This finding may be useful for addressing the nutritional health of honey bees, as colonies in this region frequently suffer from a dearth of forage contributing to colony declines during August and September when crops and weedy plants cease blooming. These results suggest that prairie can be a significant source of forage for honey bees in the later part of the growing season in the Midwestern United States; we discuss this insight in the context of honey bee health and biodiversity conservation.

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Pollen nutrition affects honey bee stress resistance

Terrestrial Arthropod Reviews ◽

10.1163/187498312x639568 ◽

2012 ◽

Vol 5 (2) ◽

pp. 175-189 ◽

Cited By ~ 61

Author(s):

Zachary Huang

Keyword(s):

Honey Bee ◽

Honey Bees ◽

Fruits And Vegetables ◽

Bee Health ◽

Colony Collapse ◽

Honey Bee Health ◽

Related Enzyme ◽

Bee Colonies ◽

Bee Virus ◽

Pollen Nutrition

The honey bee,Apis, is perhaps the most beneficial insect to humans because most of our fruits and vegetables depend on them for pollination. Yet these iconic insects have been plagued by many types of stresses. This paper reviews many lines of evidence pointing to the importance of pollen nutrition in honey bee health. In laboratory studies that used caged honey bees, poor pollen nutrition led to a reduction of worker bees’ resistance to the microsporidian,Nosema apis, an increase of bee’s sensitivity to pesticides, and an increased titer of bee virus. On the other hand, polyfloral pollen made bees more resistant to stresses by enhancing their immune related enzyme activities. At the colony level, good pollen nutrition increased honey bee’s resistance toNosema ceranaeor the ectoparasitic mite,Varroa destructor. The effects of both transportation and habitat changes on honey bees seem most likely mediated via decreased diversity, or amount, of pollen to the colonies. Pollen nutrition, therefore, might work together with other factors in reducing the bees’ resistance and exacerbate the effects of viruses, pesticides, or parasites, eventually resulting in Colony Collapse Disorder. Besides paying attention to all of these other factors, pollen nutrition should be an important focus in the future for maintaining healthy bee colonies.

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Epidemiological study of honeybee pathogens in Europe: The results of Castilla-La Mancha (Spain)

Spanish Journal of Agricultural Research ◽

10.5424/sjar/2018162-11474 ◽

2018 ◽

Vol 16 (2) ◽

pp. e0502 ◽

Cited By ~ 5

Author(s):

Maria Buendía ◽

Raquel Martín-Hernández ◽

Concepción Ornosa ◽

Laura Barrios ◽

Carolina Bartolomé ◽

...

Keyword(s):

Honey Bee ◽

Monitoring Program ◽

Field Conditions ◽

Reference Laboratory ◽

European Union Reference Laboratory ◽

Bee Colony ◽

La Mancha ◽

Bee Health ◽

Honey Bee Health ◽

Bee Colonies

As a part of a Pilot Monitoring Program of honey bee health coordinated by the EURL (European Union Reference Laboratory) and according to the criteria established for Spain, 14 apiaries in Castilla-La Mancha were selected at random and sampled during the autumns of 2012-2014 to identify the most prevalent nosogenic agents, potentially those related to the honey bee colony collapse phenomenon. In all the apiaries studied, Nosema ceranae was the most prevalent pathogen detected over the three years, confirming the worldwide spread of this microsporidian, a pathogen that negatively affects honey bee health at an individual and colony level. Trypanosomatids were also very prevalent in honey bee colonies, although the majority of Trypanosomatids detected were not Crithidia mellificae but rather the genetically distinct Lotmaria passim lineage. We also detected Varroa destructor mites, and the particularly high prevalence in 2014 suggests a possible problem regarding mite control in field conditions that requires attention. In agreement with data from other regions, the BQCV and DWV were the most prevalent viruses in honey bee colonies and thus, the Varroa-DVW interaction may be an important cause of bee colony mortality. While there was little evidence of a relationship between the BQCV virus and N. ceranae under field conditions during 2012, this was not the case in 2013 and 2014. Finally, the AKI-complex or LSV-complex was not detected. The information obtained in this study should help orientate future plans for honey bee disease control.

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Impact of Chronic Exposure to Sublethal Doses of Glyphosate on Honey Bee Immunity, Gut Microbiota and Infection by Pathogens

Microorganisms ◽

10.3390/microorganisms9040845 ◽

2021 ◽

Vol 9 (4) ◽

pp. 845

Author(s):

Loreley Castelli ◽

Sofía Balbuena ◽

Belén Branchiccela ◽

Pablo Zunino ◽

Joanito Liberti ◽

...

Keyword(s):

Gut Microbiota ◽

Honey Bee ◽

Chronic Exposure ◽

Pollination Services ◽

Deformed Wing Virus ◽

Immune Genes ◽

Bee Health ◽

Honey Bee Health ◽

Sublethal Doses ◽

The Impact

Glyphosate is the most used pesticide around the world. Although different studies have evidenced its negative effect on honey bees, including detrimental impacts on behavior, cognitive, sensory and developmental abilities, its use continues to grow. Recent studies have shown that it also alters the composition of the honey bee gut microbiota. In this study we explored the impact of chronic exposure to sublethal doses of glyphosate on the honey bee gut microbiota and its effects on the immune response, infection by Nosema ceranae and Deformed wing virus (DWV) and honey bee survival. Glyphosate combined with N. ceranae infection altered the structure and composition of the honey bee gut microbiota, for example by decreasing the relative abundance of the core members Snodgrassella alvi and Lactobacillus apis. Glyphosate increased the expression of some immune genes, possibly representing a physiological response to mitigate its negative effects. However, this response was not sufficient to maintain honey bee health, as glyphosate promoted the replication of DWV and decreased the expression of vitellogenin, which were accompanied by a reduced life span. Infection by N. ceranae also alters honey bee immunity although no synergistic effect with glyphosate was observed. These results corroborate previous findings suggesting deleterious effects of widespread use of glyphosate on honey bee health, and they contribute to elucidate the physiological mechanisms underlying a global decline of pollination services.

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Correction to: Stakeholders’ views on sustaining honey bee health and beekeeping: the roles of ecological and social system drivers

Landscape Ecology ◽

10.1007/s10980-021-01222-w ◽

2021 ◽

Vol 36 (5) ◽

pp. 1585-1585

Author(s):

Mariia Fedoriak ◽

Oleksandr Kulmanov ◽

Alina Zhuk ◽

Oleksandr Shkrobanets ◽

Kateryna Tymchuk ◽

...

Keyword(s):

Honey Bee ◽

Social System ◽

Bee Health ◽

Honey Bee Health

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Comparing Survival of Israeli Acute Paralysis Virus Infection among Stocks of U.S. Honey Bees

Insects ◽

10.3390/insects12010060 ◽

2021 ◽

Vol 12 (1) ◽

pp. 60

Author(s):

Shilpi Bhatia ◽

Saman S. Baral ◽

Carlos Vega Melendez ◽

Esmaeil Amiri ◽

Olav Rueppell

Keyword(s):

Honey Bee ◽

Honey Bees ◽

Virus Infections ◽

Israeli Acute Paralysis Virus ◽

Immune Genes ◽

Starting Point ◽

Bee Health ◽

Honey Bee Health ◽

Survival Differences ◽

Paralysis Virus

Among numerous viruses that infect honey bees (Apis mellifera), Israeli acute paralysis virus (IAPV) can be linked to severe honey bee health problems. Breeding for virus resistance may improve honey bee health. To evaluate the potential for this approach, we compared the survival of IAPV infection among stocks from the U.S. We complemented the survival analysis with a survey of existing viruses in these stocks and assessing constitutive and induced expression of immune genes. Worker offspring from selected queens in a common apiary were inoculated with IAPV by topical applications after emergence to assess subsequent survival. Differences among stocks were small compared to variation within stocks, indicating the potential for improving honey bee survival of virus infections in all stocks. A positive relation between worker survival and virus load among stocks further suggested that honey bees may be able to adapt to better cope with viruses, while our molecular studies indicate that toll-6 may be related to survival differences among virus-infected worker bees. Together, these findings highlight the importance of viruses in queen breeding operations and provide a promising starting point for the quest to improve honey bee health by selectively breeding stock to be better able to survive virus infections.

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