Alexander Weigand

Musée National d'Histoire Naturelle

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Florian Leese

University of Duisburg-Essen

Agnès Bouchez

Centre Alpin sur les Réseaux Trophiques et Ecosystèmes Lacustre

Dieter Weber

Royal Perth Hospital

Adrienne Jochum

Natural History Museum of Bern

Markus Pfenninger

Senckenberg Biodiversity and Climate Research Centre

Daniel Hering

University of Duisburg-Essen

Jan‐Niklas Macher

Naturalis Biodiversity Center

Annette Klussmann‐Kolb

Senckenberg Biodiversity and Climate Research Centre

Hannah Weigand

University of Duisburg-Essen

Daniel Grabner

University of Duisburg-Essen

Cooperative Institutions

Centre National de la Recherche Scientifique

Musée National d'Histoire Naturelle

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

University of Duisburg-Essen

Swedish University of Agricultural Sciences

Goethe University Frankfurt

BOKU University

Centre for Ecological Research

University of Vienna

University of Novi Sad

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Updates to the checklist of the wild bee fauna of Luxembourg as inferred from revised natural history collection data and fieldwork

Biodiversity Data Journal (2021)

Fernanda Herrera‐Mesías Alexander Weigand

Museums and other institutions curating natural history collections (NHCs) are fundamental entities to many scientific disciplines, as they house data and reference material for varied research projects. As such, biological specimens preserved in NHCs represent accessible physical records of the living world's history. They provide useful information regarding the presence and distribution of different taxonomic groups through space and time. Despite the importance of biological museum specimens, their potential to answer scientific questions, pertinent to the necessities of our current historical context, is often under-explored.The currently-known wild bee fauna of Luxembourg comprises 341 registered species distributed amongst 38 different genera. However, specimens stored in the archives of local NHCs represent an untapped resource to update taxonomic lists, including potentially overlooked findings relevant to the development of national conservation strategies.We re-investigated the wild bee collection of the Zoology Department of the National Museum of Natural History Luxembourg by using morphotaxonomy and DNA barcoding. The collection revision led to the discovery of four species so far not described for the country: Andrena lagopus (Latreille, 1809), Nomada furva (Panzer, 1798), Hoplitis papaveris (Latreille, 1799) and Sphecodes majalis (Pérez, 1903). Additionally, the presence of Nomada sexfasciata (Panzer, 1799), which inexplicably had been omitted by the most current species list, can be re-confirmed. Altogether, our findings increase the number of recorded wild bee species in Luxembourg to 346. Moreover, the results highlight the crucial role of NHCs as repositories of our knowledge of the natural world.

10.3897/bdj.9.e64027

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Citations (56)

Additional file 1: of Positive selection on panpulmonate mitogenomes provide new clues on adaptations to terrestrial life

Pedro Romero Alexander Weigand Markus Pfenninger

Evolutionary rates for nucleotides (NT; blue line) and amino acids (AA; red line) in the euthyneuran mitogenomes. Rates are scaled such that the average evolutionary rate across all sites is 1 (red line). The x-axis shows amino acid positions in the final concatenated alignment. (PDF 481 kb)

Line (geometry)

Positive selection

10.6084/m9.figshare.c.3630209_d1

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Simultaneous mapping of the velocity and deformation field at a free surface

Experiments in Fluids (1996)

Alexander Weigand

Shadowgraph

10.1007/bf00191017

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Citations (9)

Quantitative monitoring of diverse fish communities on a large scale combining eDNA metabarcoding and qPCR

Molecular Ecology Resources (2022)

Didier Pont Paul Meulenbroek V. Bammer Tony Déjean Tibor Erős

Environmental DNA (eDNA) metabarcoding is an effective method for studying fish communities but allows only an estimation of relative species abundance (density/biomass). Here, we combine metabarcoding with an estimation of the total abundance of eDNA amplified by our universal marker (teleo) using a quantitative (q)PCR approach to infer the absolute abundance of fish species. We carried out a 2850-km eDNA survey within the Danube catchment using a spatial integrative sampling protocol coupled with traditional electrofishing for fish biomass and density estimation. Total fish eDNA concentrations and total fish abundance were highly correlated. The correlation between eDNA concentrations per taxon and absolute specific abundance was of comparable strength when all sites were pooled and remained significant when the sites were considered separately. Furthermore, a nonlinear mixed model showed that species richness was underestimated when the amount of teleo-DNA extracted from a sample was below a threshold of 0.65 × 10

Environmental DNA

Electrofishing

10.1111/1755-0998.13715

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Citations (46)

Fungus gnat species new to Luxembourg (Diptera: Keroplatidae, Mycetophilidae)

Bulletin de la Société des naturalistes luxembourgeois (2024)

Olavi Kurina Alexander Weigand Dieter Weber

Four fungus gnat species – Macrocera crassicornis Winnertz, 1864, Macrorrhyncha flava Winnertz, 1846, Exechiopsis (E.) pseudindecisa Lastovka & Matile, 1974, and Mycetophila rudis Winnertz, 1864 – are recorded from Luxembourg for the first time. The number of fungus gnat species in Luxembourg has risen to 80. Mycetophila rudis is documented for the first time from a subterranean environment.

10.59513/snl.2024.126.083

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Double-blind validation of alternative wild bee identification techniques: DNA metabarcoding and in vivo determination in the field

Journal of Hymenoptera Research (2022)

Fernanda Herrera‐Mesías Christopher Bause Sophie Ogan Hannah Burger Manfred Ayasse

Over the past few decades, several investigations around the globe have reported alarming declines in the abundance and diversity of bee species. The success of effective conservation strategies targeting these important pollinators relies heavily on accurate biodiversity assessments. The shortage of taxonomic experts and the escalation of the ongoing biodiversity crisis call for the development of alternative identification tools to implement efficient monitoring programs. The validation of such techniques is crucial to ensure that they provide results comparable to those of traditional morphotaxonomy. Here we performed two double-blind experiments to evaluate the accuracy of a pair of new techniques used for wild bee identification: DNA metabarcoding and in vivo identification in the field. The methods were tested on sets of wild bees from Germany and their results compared against evaluations done by panels of bee experts using traditional morphotaxonomy. On average the congruency of species identification between metabarcoding and morphotaxonomy was 88.98% across samples (N = 10), while in vivo identification and morphotaxonomy were 91.81% congruent (N = 7) for bees considered feasible for in vivo identification in the field. Traditional morphotaxonomy showed similar congruencies when compared to itself: 93.65% in the metabarcoding study and 92.96% in the in vivo study. Overall, these results support both new methods as viable alternatives to traditional microscopy-based assessment, with neither method being error-free. Metabarcoding provides a suitable option to analyze large numbers of specimens in the absence of highly trained taxonomic experts, while in vivo identification is recommended for repeated long-term monitoring, and when working in areas where the sampling of individuals could threaten local populations of endangered wild bee species. Further research is still needed to explore the potential of both techniques for conservation management and wildlife monitoring, as well as to overcome their current limitations as taxonomic tools.

Identification

Economic shortage

10.3897/jhr.93.86723

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Citations (9)

Rare migrants suffice to maintain high genetic diversity in an introduced island population of roe deer (Capreolus capreolus): Evidence from molecular data and simulations

Mammalian Biology (2017)

Peter Steinbach Mike Heddergott Hannah Weigand Alexander Weigand Elodie Wilwert

Capreolus

Mainland

Founder effect

Effective population size

10.1016/j.mambio.2017.11.009

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Symptoms caused by the invasive American buffalo treehopper Stictocephala bisonia Kopp & Yonke 1977 (Insecta, Hemiptera) in Luxembourgish viticulture

Bulletin de la Société des naturalistes luxembourgeois (2024)

Kristina Heilemann Mareike Schultz Alexander Weigand Daniel Molitor Lukas Egarter Vigl

This study provides the first documented discovery of symptoms caused by the cicada Stictocephala bisonia (buffalo treehopper) in Luxembourgish viticulture. Symptoms were found in 2022 in red grapevine cultivars, also in 2023 symptoms on vine plants occurred and two adults of the buffalo treehopper were caught. A characterisation of the resulting symptoms and a discussion on the species’ potential pest status depending on annual meteorological conditions are provided.

Vine

10.59513/snl.2024.126.011

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Shared microsporidian profiles between an obligate (Niphargus) and facultative subterranean amphipod population (Gammarus) at sympatry provide indications for underground transmission pathways

Limnologica (2016)

Alexander Weigand Jenia Kremers Daniel Grabner

Obligate

Gammarus

Facultative

Obligate parasite

10.1016/j.limno.2016.01.005