A5065773262- Insect and Pesticide Research
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Bee Products Chemical Analysis
- Insect Resistance and Genetics
- Ecology and Vegetation Dynamics Studies
- Genetically Modified Organisms Research
- Rangeland and Wildlife Management
- Plant Parasitism and Resistance
Iowa State University
2019-2024
Wageningen University & Research
2023
University of California, San Diego
2019-2023
Julius Kühn-Institut
2020
Hebrew University of Jerusalem
2012-2019
University of Würzburg
2011-2013
University of Bayreuth
2010
Bees are the most important group of insect pollinators, but their populations declining. To gain a better understanding wild bee responses to different stressors (e.g. land-use change) and conservation measures, regional national monitoring schemes currently being established in Germany, which is used here as model region, many other countries. We offer perspectives on how best design future programs with focus evaluating implementation measures. discuss traditional novel sampling methods,...
Foraging decisions of social animals occur in the context groups, and thus may be subject to considerations not only an individual's nutritional state nutrient input, but those group which they live. In eusocial insects, live colonies containing workers that forage for food is mostly consumed by others, foraging reflect colony needs also considered at both individual level. If energy balance perturbed, counteracting response occurring on level (a change division labor) or choices)? To...
Summary 1. To sustain the vital ecosystem service of pollination, new methodical developments are needed for research on underlying factors globally observed bee losses. In particular, robust laboratory methods assessing adverse effects honey brood required. addition, from a statistical point view, shared origin test individuals must be considered when analysing ecotoxicological data. 2. improve in vitro rearing, we adopted nongrafting method to collect larvae without direct manipulation....
The ecologically and economic important honey bee (Apis mellifera) is a key non-target arthropod species in environmental risk assessment (ERA) of genetically modified (GM) crops. Honey larvae are directly exposed to transgenic products by the consumption GM pollen. But most ERA studies only consider responses adult bees, although Bt-proteins primarily affect larval phases target organisms. We adopted an vitro rearing system, assess lethal sublethal effects Bt-pollen standardized...
Honey bee pollination is a key ecosystem service to nature and agriculture. However, biosafety research on genetically modified crops rarely considers effects nurse bees from intact colonies, even though they receive primarily process the largest amount of pollen. The objective this study was analyze response their gut bacteria pollen Bt maize expressing three different insecticidal Cry proteins (Cry1A.105, Cry2Ab2, Cry3Bb1). Naturally are produced by (Bacillus thuringiensis). Colonies Apis...
Abstract Populations of wild and managed pollinators are declining in North America, causes include increases disease pressure decreases flowering resources. Tallgrass prairies can provide floral resources for honey bees (Hymenoptera: Apidae, Apis mellifera Linnaeus) bees. Honey kept near may compete with resources, potentially transfer viral pathogens to Measurements these potential interactions lacking, especially the context native habitat conservation. To address this, we assessed...
This study examined the adaptive association between seed germination ecology and specialization to either forest or open habitats across a range of evolutionary lineages plants, in order test hypotheses that (1) species' vs. shaded is consistently accompanied by their regeneration niche; (2) species are thereby adapted utilize different windows opportunity time (season) space (habitat). Seed response temperature, light stratification was tested for 17 congeneric pairs, each consisting one...
*Graphical Abstract (for review) *Highlights Honey bee colonies in Israel collect a mean 7 kg protein and 0.7 fat per year At maximal colony development, honey queens lay up to 3,300 eggs day Amount content of collected pollen differ between sites seasons Pollen linoleic acid levels best describe production cost Colonies seem limited first by climate, then finally specific nutrients ABSTRACT is the main lipid source for bees ( Apis mellifera ), nutritionally impoverished landscapes pose...
Click to increase image sizeClick decrease sizeKeywords: honey beedead bee trapmortalityecotoxicologyrisk assessmentpesticide testingtoxicity tests
Abstract Honey bees are important pollinators, requiring floral pollen and nectar for nutrition. Nectar is rich in sugars, but contains additional nutrients, including amino acids (AAs). We tested the preferences of free-flying foragers between 20 AAs at 0.1% w/w sucrose solutions an artificial meadow. found consistent amongst AAs, with essential preferred over nonessential AAs. The preference correlated negatively AA induced deviations pH values, as compared to control. Next, we quantified...
Bienen sind essentielle Bestauber und daher ist ihr Schutz von zentraler Bedeutung fur die Sicherung der biologischen Vielfalt landwirtschaftlichen Produktion. Innerhalb des Projekts MonViA werden viele Partner zusammenarbeiten, um wirksame Strategien zur Forderung zu entwickeln. Wir prasentieren eine Langzeit-Fallstudie wie sich Klima auf Leistungsfahigkeit Honigbienenvolkern auswirkt. Veranderungen mitteleuropaischen Honigertrags haben wir in Bezug Anderung Temperatur Niederschlag...
Honey bee defensive behaviors are crucial for countering new predators such as invasive German yellowjackets (Vespula germanica). We provide the first data on ability of scutellata-hybrids (Africanized bees) to defend their colonies against V. germanica wasps, compared European honey bees. The scutellata-hybrid recruited twice many defender bees in defense, and killed three times more often than managed colonies. hybrids threats is intriguing suggests that research should be conducted into...
Beekeepers use organic acids to control the invasive parasitic mite Varroa destructor (Varroa mite) in honey bee colonies (Apis mellifera), as an alternative synthetic acaricides, which mites can develop resistance. Here, we tested efficacy of two formic acid treatments for control: a solid matrix product (Formic Pro; n = 10 colonies) and liquid (Formivar 60; colonies), relative that were not treated with (n 10). Both killed >95% mites, however, also resulted 1.6 times more brood loss 30%...