A5047462659- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Insect and Pesticide Research
- Plant Parasitism and Resistance
- Ecology and Vegetation Dynamics Studies
- Plant Diversity and Evolution
- Hymenoptera taxonomy and phylogeny
- Botany, Ecology, and Taxonomy Studies
- Lepidoptera: Biology and Taxonomy
- Fossil Insects in Amber
- Species Distribution and Climate Change
- Botanical Research and Chemistry
- Forest Insect Ecology and Management
- Plant Toxicity and Pharmacological Properties
- Forest Ecology and Biodiversity Studies
- Mycorrhizal Fungi and Plant Interactions
- Horticultural and Viticultural Research
- Fern and Epiphyte Biology
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Mediterranean and Iberian flora and fauna
- Bee Products Chemical Analysis
- Genetic diversity and population structure
- Environmental DNA in Biodiversity Studies
- Insect behavior and control techniques
University of Neuchâtel
2016-2025
Centre Suisse de Cartographie de la Faune
2021-2024
ETH Zurich
2006-2023
Biocom
2023
Instituto de Ciencias Agrarias
2023
École Polytechnique Fédérale de Lausanne
2017-2018
Cornell University
2009-2012
University of Bern
2006-2010
Bees require large amounts of pollen for their own reproduction. While several morphological flower traits are known to have evolved protect plants against excessive harvesting by bees, little is on how selection minimize loss acts the chemical composition pollen. In this study, we traced larval development four solitary bee species, each specialized a different source, when reared non-host transferring unhatched eggs one species onto provisions another species. Pollen diets Asteraceae and...
The subgenus Pseudomegachile Friese of the large genus Megachile Latreille is revised for Western Palaearctic region, Iran, and Arabian Peninsula. Twenty species are recognized, which five new: blepharis Dorchin Praz from Israel, M. plumigera Oman United Arab Emirates, syriaca Syria Turkey, yezidica Turkey maxschwarzi Iran Central Asia. following new synonymies proposed: inermis Radoszkowski 1893 (as well as replacement name mitis Cockerell 1899), albifasciata Rebmann 1970 transgrediens...
Stark contrasts in clade species diversity are reported across the tree of life and especially conspicuous when observed closely related lineages. The explanation for such disparity has often been attributed to evolution key innovations that facilitate colonization new ecological niches. factors underlying diversification bees remain poorly explored. Bees thought have originated from apoid wasps during Mid-Cretaceous, a period coincides with appearance angiosperm eudicot pollen grains fossil...
As increasingly large molecular data sets are collected for phylogenomics, the conflicting phylogenetic signal among gene trees poses challenges to resolve some difficult nodes of Tree Life. Among these nodes, position honey bees (Apini) within corbiculate bee group remains controversial, despite its considerable importance understanding emergence and maintenance eusociality. Here, we show that this controversy stems in part from pervasive conflicts GC-rich trees. genes typically have a high...
Morocco is a well known hot-spot of biodiversity in the Mediterranean basin. While some taxa like vascular plants are relatively recorded, important groups pollinators bees still understudied. This article presents an updated checklist bee species and includes summary global regional distribution each species. A total 961 belonging to six families 68 genera recorded: Andrenidae (8 genera, 217 species); Apidae (15 241 Colletidae (2 74 species), Halictidae (12 144 Megachilidae (28 271 species)...
Iberia has one of the richest bee faunas in world, and genus Andrena is no exception with around 200 species known from Peninsula. The fauna was largely revised 1970s, but since then, it received little attention. Molecular investigation taxonomically challenging subgenus Taeniandrena revealed that situation more complicated than previously thought several cryptic overlooked species. From allied to (T. ) gelriae van der Vecht, 1927, gredana Warncke, 1975 stat. nov. Spain Portugal raised...
We revise the Alpine bee taxa related to Andrenabicolor (Fabricius, 1775), including A.montana Warncke, 1973 and A.allosa 1975, status of which has remained contentious. Phylogenetic analyses one mitochondrial gene nuclear gene, as well morphological examination reveal presence four species in this complex, is new science, A.amieti sp. n. This widely distributed Alps from southern France throughout Switzerland, northern Italy Germany Austria; a single record known Apennines. The type...
At a time when nature conservation has become essential to ensure the long-term sustainability of our environment, it is widely acknowledged that actions must be implemented within solid taxonomic framework. In preparation for upcoming update IUCN Red List, we here European checklist wild bees (sensu geographical framework). The original checklist, published in 2014, was revised first 2017. present revision, add one genus, four subgenera and 67 species recently described, 40 newly recorded...
Using a combination of DNA barcodes and morphology, we examine species boundaries in bees the genus Andrena subgenus Taeniandrena Europe. First, solve long controversy surrounding status ovatula (Kirby, 1802) A. albofasciata Thomson, 1870, proposed to represent distinct nearly 100 years ago, but mostly treated as conspecific recent studies. Our results unambiguously support presence two taxa that are often found sympatry: first taxon, referred , is present Northern Europe also Southern along...
Abstract Pollinators play a crucial role in ecosystems globally, ensuring the seed production of most flowering plants. They are threatened by global changes and knowledge their distribution at national continental levels is needed to implement efficient conservation actions, but this still fragmented and/or difficult access. As step forward, we provide an updated list around 3000 European bee hoverfly species, reflecting current distributional status level (in form present, absent,...
Updated checklist of bees mainland France (Hymenoptera: Apocrita: Apoidea). - The from metropolitan is presented here, with an update the previous published in 1995 which included 865 species. A total 150 species have been added to this checklist, 114 thanks new distributional records and 36 due their taxonomic status. In addition, 32 removed list, along 12 recently reported French territory whose presence has either refuted, deemed doubtful, or requires confirmation. This work results a...
Abstract The Palaearctic complex of anthidiine bees closely related to Pseudoanthidium scapulare has long been a source unresolved taxonomic and systematic issues. Until now, the number species in their geographical distributions were largely unclear, thus complicating compilation accurate checklists hindering conservation efforts. In order address these issues, we use morphology mitochondrial cytochrome c oxidase subunit I (COI) sequences, combined with thorough examination relevant...
Bumble bees (Bombus) are a group of eusocial with strongly generalised feeding pattern, collecting pollen from many different botanical families. Though predominantly generalists, some bumble bee species seem to have restricted dietary choices. It is unclear whether diets in inherent or function local conditions due lack data for across regions. The objective this study was determine displayed specific patterns collection, and were influenced by phylogenetic relatedness tongue length, trait...
To trace the evolution of host-plant choice in bees genus Chelostoma (Megachilidae), we assessed host plants 35 Palearctic, North American and Indomalayan species by microscopically analyzing pollen loads 634 females reconstructed their phylogenetic history based on four genes a morphological dataset, applying both parsimony Bayesian methods. All except two were found to be strict specialists at level plant family or genus. These oligolectic together exploit flowers eight different orders...
Phylogenetic relationships within the bee family Megachilidae are poorly understood. The monophyly of subfamily Fideliinae is questionable, among tribes and subtribes in Megachilinae unknown, some extant genera cannot be placed with certainty at tribal level. Using a cladistic analysis adult external morphological characters, we explore eight two currently recognised Megachilidae. Our dataset included 80% generic‐level diversity, representatives all fossil taxa, was analysed using parsimony....
Pyrrolizidine alkaloids (PAs) in honey can be a potential human health risk. So far, it has remained unclear whether PAs originate from pollen or floral nectar. We obtained honey, nectar, and plant two observation sites where Echium vulgare L. was naturally abundant. The PA concentration of determined by targeted analysis using high pressure liquid chromatography-mass spectrometry system (HPLC-MS/MS), allowing the quantification six different PA-N-oxides present E. vulgare. Echium-type were...
The purpose of this study is to describe the mature larvae all taxa tribe Osmiini (Megachilidae) whose postdefecating have been collected and are available. hope that data uncovered will eventually lead a better understanding interrelationships included their anatomies, behaviors, ecologies (i.e., natural histories). species representatives following taxa: Ashmeadiella, Atoposmia, Chelostoma, Heriades, Hoplitis, Osmia (Hoplosmia). We also include recently described larval Haetosmia...
The pollen of many plants contains toxic secondary compounds, sometimes in concentrations higher than those found the flowers or leaves. ecological significance these compounds remains unclear, and their impact on bees is largely unexplored. Here, we studied pyrrolizidine alkaloids (PAs) Echium vulgare honeybee adults larvae. Echimidine, a PA present E. pollen, was isolated added to diets order perform toxicity bioassays. While adult showed relatively high tolerance PAs, larvae were much...
Abstract Accurate and testable species hypotheses are essential for measuring, surveying managing biodiversity. Taxonomists often rely on mitochondrial DNA barcoding to complement morphological delimitations. Although COI‐barcoding has largely proven successful in assisting identifications most animal taxa, there nevertheless numerous cases where barcodes do not reflect hypotheses. For instance, what is regarded as a single can be associated with two distinct barcodes, which point either...
The evolution of parasitic behavior may catalyze the exploitation new ecological niches yet also binds fate a parasite to that its host. It is thus not clear whether evolutionary transitions from free-living organism lead increased or decreased rates diversification. We explore brood parasitism in long-tongued bees and find diversification eight 10 clades. propose pathway for strategy which closed host nest cell parasitized offspring killed by adult represents an obligate first step...