Robert Brodschneider

Robert Brodschneider
Karl-Franzens-Universität Graz | KFU Graz · Institute of Biology

Phd

About

121
Publications
84,695
Reads
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3,320
Citations
Citations since 2017
77 Research Items
2475 Citations
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Introduction
Robert Brodschneider works at the Institute of Biology, Karl-Franzens-Universität Graz. Robert does research in Zoology and Physiology, mainly on the honey bee (Apis mellifera). One of his current projects is 'COLOSS monitoring of honey bee colony losses.' Robert is also editor of the journal Bee World and editorial board member of the Journal of Apicultural Research.
Additional affiliations
January 2009 - present
Karl-Franzens-Universität Graz
Position
  • Researcher

Publications

Publications (121)
Article
Full-text available
In the “contributory” citizen science project INSIGNIA, beekeepers carried out non-invasive sampling of their own honey bee colonies for an environmental investigation of pesticide residues and pollen plant origin. We surveyed several traits and attitudes of 69 of the volunteering beekeepers from ten countries. We found that their motivation was si...
Article
Full-text available
Honeybees are of great importance because of their role in pollination as well as for hive products. The population of managed colonies fluctuates over time, and recent monitoring reports show different levels of colony losses in many regions and countries. The cause of this kind of loss is a combination of various factors, such as the parasitic mi...
Article
Full-text available
Honey is a functional food with health-promoting properties. Some types of honey are used in wound care for the treatment of acute and chronic infected wounds. Increased interest in using honey as a functional food and as a base for wound care products causes limited availability of raw honey. Numerous studies suggest that the protein content of ho...
Article
Full-text available
The western honey bee ( Apis mellifera ) is one of the most important insects kept by humans, but high colony losses are reported around the world. While the effects of general climatic conditions on colony winter mortality were already demonstrated, no study has investigated specific weather conditions linked to biophysical processes governing col...
Article
Full-text available
Beekeepers have various options to control the parasitic mite Varroa destructor in honey bee colonies, but no empirical data are available on the methods they apply in practice. We surveyed 28,409 beekeepers maintaining 507,641 colonies in 30 European countries concerning Varroa control methods. The set of 19 different Varroa diagnosis and control...
Article
There is an ongoing debate if and to what extend honey bees (Apis mellifera) might present competition against other pollinators, particularly other species of bees. In our comment we reanalyze data from Weekers et al. (2022) on bee pollinators of apple, collected in an impressive large-scale study in Western Europe. We challenge one of their findi...
Article
Full-text available
We investigated the effect of adult honey bee pollen nutrition on the flight performance of honey bees. Therefore, caged bees were allowed to perform 30 min of defecation/training flights every second day before flight performance of pollen-fed bees and pollen-deprived bees older than 16 days were compared in a flight mill. We first fed 10 µL of 1...
Article
Full-text available
This article presents managed honey bee colony loss rates over winter 2019/20 resulting from using the standardised COLOSS questionnaire in 37 countries. Six countries were from outside Europe, including, for the first time in this series of articles, New Zealand. The 30,491 beekeepers outside New Zealand reported 4.5% of colonies with unsolvable q...
Article
Full-text available
Pollen metabarcoding is emerging as a powerful tool for ecological research and offers unprecedented scale in citizen science projects for environmental monitoring via honey bees. Biases in metabarcoding can be introduced at any stage of sample processing and preservation is at the forefront of the pipeline. While in metabarcoding studies pollen ha...
Article
Full-text available
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, beekeep...
Article
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Precision beekeeping, or precision apiculture, focuses on individual beehive remote monitoring using different measurement systems and sensors. Sometimes, there are debates about the necessity for such systems and the real-life benefits of the substitution of bee colony manual inspection by automatic systems. Remote systems offer many advantages, b...
Article
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Homogenized or pooled samples of honey bees are used for monitoring of metal pollution in the environment already for a couple of decades. This is the first study that analyzed the elemental composition of individual honey bees. One apiary with 21 hives was used to test in-hive and between-hive differences at the same location. Highest in-hive vari...
Article
Full-text available
The honey bee is an important fruit and vegetable pollinator and a producer of honey and other hive products. Beekeeping is a sustainable and high-potential activity for local communities and especially for the rural poor to gain additional income through non-timber forest products, does not require much land or high starting costs, maintains biodi...
Article
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The European Union funded project SAMS (Smart Apiculture Management Services) enhances international cooperation of ICT (Information and Communication Technologies) and sustainable agriculture between EU and developing countries in pursuit of the EU commitment to the UN Sustainable Development Goal “End hunger, achieve food security and improved nu...
Article
Full-text available
The wilderness area Dürrenstein-a habitat for feral honey bee colonies? This is an initial study on wild (or feral) honey bee colonies (Apis mellif-era) in the Dürrenstein wilderness area in Austria, using the method of "Beelining", as described by T.D. Seeley. The wilderness area is free of managed bee colonies and surrounding apiaries are known....
Article
Full-text available
The socio-economic impacts of COVID-19 on society have yet to be truly revealed; there is no doubt that the pandemic has severely affected the daily lives of most of humanity. It is to be expected that the research activities of scientists could be impacted to varying degrees, but no data exist on how COVID-19 has affected research specifically. He...
Article
Full-text available
This article presents managed honey bee colony loss rates over winter 2018/19 resulting from using the standardised COLOSS questionnaire in 35 countries (31 in Europe). In total, 28,629 beekeepers supplying valid loss data wintered 738,233 colonies, and reported 29,912 (4.1%, 95% confidence interval (CI) 4.0–4.1%) colonies with unsolvable queen pro...
Article
Full-text available
We conducted a citizen science survey on overwinter honey bee colony losses in Austria. A total of 1534 beekeepers with 33,651 colonies reported valid loss rates. The total winter loss rate for Austria was 15.2% (95% confidence interval: 14.4–16.1%). Young queens showed a positive effect on colony survival and queen-related losses. Observed queen p...
Article
Full-text available
Leonard et al. (Science 367, 573-576, 2020) presented an interesting approach to limit the impact of pathogens on honeybees by stimulating immunity via engineered symbionts. The urgency to safeguard pollinator services is undoubted. Massive declines in bees, insects in general, pose major concerns for ecosystem stability and food production. Howev...
Article
Full-text available
Austrian beekeepers participated in the “C.S.I. Pollen” study as citizen scientists and collected pollen from honey bee colonies in hive mounted traps every three weeks from April to September in 2014 and 2015 to uncover the seasonal availability of pollen sources for bees. 1622 pollen samples were collected and analysed using palynological light m...
Poster
Full-text available
This poster was presented at the Apimondia 2019 in Montreal. Opinions and discussions are welcome, but the poster won't be changed anymore as it was already presented. To those of you who wanted the file of the chapter on the same topic: we're not allowed to share it, I'm sorry. By some reason, I can't send messages with the decline.
Article
Full-text available
Austrian beekeepers frequently suffered severe colony losses during the last decade similar to trends all over Europe. This first surveillance study aimed to describe the health status of Austrian bee colonies and to analyze the reasons for losses for both the summer and winter season in Austria. In this study 189 apiaries all over Austria were sel...
Article
Full-text available
This short article presents loss rates of honey bee colonies over winter 2017/18 from 36 countries, including 33 in Europe, from data collected using the standardized COLOSS questionnaire. The 25,363 beekeepers supplying data passing consistency checks in total wintered 544,879 colonies, and reported 26,379 (4.8%, 95% CI 4.7–5.0%) colonies with uns...
Article
Full-text available
Honey bees are the most important managed pollinators and provide income because of bee products. In Austria and Czechia, we monitored winter losses of honey bee colonies and also collected information on the apicultural sector, hive management, population dynamics and treatment against the mite Varroa destructor from 2013-14 to 2016-17. Numbers of...
Article
Full-text available
Citizen science (CS) terms the active participation of the general public in scientific research activities. With increasing amounts of information generated by citizen scientists, best practices to go beyond science communication and publish these findings to the scientific community are needed. This letter is a synopsis of authors' personal exper...
Article
Full-text available
The health of honey bee colonies is, amongst others, affected by the amount, quality and diversity of available melliferous plants. Since landscape is highly diverse throughout Austria regarding the availability of nutritional resources, we used data from annual surveys on honey bee colony losses ranging over six years to analyse a possible relatio...
Article
Full-text available
We investigated the importance of protein nutrition for honey bee immunity. Different protein diets (monofloral pollen of Helianthus spp., Sinapis spp., Asparagus spp., Castanea spp., a mixture of the four different pollen and the pollen substitute FeedbeeTM) were fed to honey bees in cages ad libitum. After 18 days of feeding, apidaecin 1 isoforms...
Article
Full-text available
In endothermic wasps, foraging is an expensive activity. To maximise the benefit for the colony, wasps can optimise either the intake rate or energetic efficiency of a foraging trip. We investigated the foraging behaviour of Vespine wasps under variable environmental and reward conditions. We trained them to forage for 0.5 molar sucrose solution fr...
Article
Full-text available
In this short note we present comparable loss rates of honey bee colonies during winter 2016/2017 from 27 European countries plus Algeria, Israel and Mexico, obtained with the COLOSS questionnaire. The 14,813 beekeepers providing valid loss data collectively wintered 425,762 colonies, and reported 21,887 (5.1%, 95% confidence interval 5.0–5.3%) colo...
Article
Full-text available
In this short note we present comparable loss rates of honey bee colonies during winter 2016/2017 from 27 European countries plus Algeria, Israel and Mexico, obtained with the COLOSS questionnaire. The 14,813 beekeepers providing valid loss data collectively wintered 425,762 colonies, and reported 21,887 (5.1%, 95% confidence interval 5.0–5.3%) col...
Preprint
Full-text available
Die Plattform Österreich forscht (www.citizen-science.at) wurde 2014 mit den Zielen gegründet, (1) Citizen Science Akteurinnen und Akteure in Österreich zu vernetzen, (2) einen möglichst umfassenden Überblick über Citizen Science Projekte in Österreich zu geben und (3) allgemein die Methodik Citizen Science wissenschaftlich weiter zu entwickeln.Vie...
Preprint
Full-text available
The platform Österreich forscht (www.citizen-science.at) was founded in 2014 with the objectives of (1) connecting citizen science actors in Austria, (2) providing the broadest possible overview of citizen science projects in Austria, and (3) scientifically advancing citizen science as a method.Following the initiative of the platform Österreich fo...
Conference Paper
Full-text available
Honey bees (Apis mellifera) are of great importance because of their role in pollination as well as for production of bee products such as honey, wax, pollen, propolis, royal jelly and bee venom. The colony population fluctuates over time, and recent monitoring reports show different levels of colony losses in many regions and countries all over th...
Article
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Article
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We measured the distribution of sugar solution within groups of caged honey bees (Apis mellifera) under standard in vitro laboratory conditions using 14 C polyethylene glycol as a radioactive marker to analyze ingestion by individual bees after group feeding. We studied the impact of different experimental setups by varying the number of bees, age...
Data
Conversion of dpm to consumed volume. This includes text and one reference about 1. the standard curve, created for each experiment to convert the measured dpm into consumed μL of the applied sugar solution diet, 2. correction of the data with recovery factors, 3. correction of results for temporary and acute experiments and 4. correction of result...
Data
Correlations (Spearman rs) between raw data (dpm), uncorrected intake (μL) and corrected intake (μL) in temporary1, acute2, permanent3 and chronic4 experiments. Spearman’s rho (ρ) = correlation coefficient. * p≤0.01. (DOCX)
Data
Composition of applied feeding solutions diets for temporary1, acute2, permanent3 and chronic4 feeding regimes. Feeding regime, experiment, the amount of applied sugar solution diet (μL), PEG (μL) and imidacloprid (μL) dose are shown. PEG (Perkin Elmer): 18.5 Bq/μL, Imidacloprid: LD50: 4.5 ng/bee, LC50:1760 μg/L, 1/50 LD50: 0.09 ng/bee, 1/50 LC50:...
Article
Full-text available
Preference of different species of Bombus (Hymeno ptera: Apidae) and other flower visiting pollinators for flowers of Styrian Oil Pumpkin. Much of our crops are pollinated by insects. In this study we investigated, if bumblebees (Bombus) visit the flowers of the Styrian Oil Pumpkin (Cucurbita pepo var. styriaca), because they are potentially more e...
Article
Full-text available
We examined the consumption rate of protein diets in caged and free-flying honey bees, amino acid composition of diets, and diet effects on gland development. The effect of seven different diets (sugar solution only, Feedbee®, Helianthus pollen, Sinapis pollen, Asparagus pollen, Castanea pollen, and mixed pollen diet) on the development of the hypo...
Article
Full-text available
In this short note we present comparable loss rates of honey bee colonies during winter 2015/16 from 29 countries, obtained with the COLOSS questionnaire. Altogether, we received valid answers from 19,952 beekeepers. These beekeepers collectively wintered 421,238 colonies, and reported 18,587 colonies with unsolvable queen problems and 32,048 dead...
Article
Full-text available
Insect pollinators are essential to global food production. For this reason, it is alarming that honey bee (Apis mellifera) populations across the world have recently seen increased rates of mortality. These changes in colony mortality are often ascribed to one or more factors including parasites, diseases, pesticides, nutrition, habitat dynamics,...
Article
Full-text available
Hydroxymethylfurfural (HMF) is a heat-formed, acid-catalyzed contaminant of sugar syrups, which find their way into honey bee feeding. As HMF was noted to be toxic to adult honey bees, we investigated the toxicity of HMF towards larvae. Therefore we exposed artificially reared larvae to a chronic HMF intoxication over 6 days using 6 different conce...
Article
Full-text available
Vespine wasps (Vespula sp.) are endowed with a pronounced ability of endothermic heat production. To show how they balance energetics and thermoregulation under variable environmental conditions, we measured the body temperature and respiration of sucrose foragers (1.5 M, unlimited flow) under variable ambient temperature (Ta = 20–35 °C) and solar...
Article
Full-text available
“C.S.I. Pollen” aims to be the largest investigation on pollen diversity available to honey bee colonies in Europe. This should be accomplished by an international approach involving beekeepers to participate as citizen scientists.