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André Piuz

Natural History Museum of Geneva

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Christian Meister

Natural History Museum of Geneva

Lionel Cavin

Natural History Museum of Geneva

Madani Benyoucef

Université Mustapha Stambouli de Mascara

Djamila Zaoui

University of Abou Bekr Belkaïd

Mustapha Bensalah

University of Abou Bekr Belkaïd

Mohammed Adaci

University of Abou Bekr Belkaïd

Vicent Vicedo

Natural Science Museum of Barcelona

Bruno Ferré

Scientific Centre of Monaco

Soumia Tchenar

University of Abou Bekr Belkaïd

Christophe Ferrante

Natural History Museum of Geneva

Cooperative Institutions

Centre National de la Recherche Scientifique

Natural History Museum of Geneva

University of Abou Bekr Belkaïd

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

Université Savoie Mont Blanc

University of Geneva

Muséum national d'Histoire naturelle

Centre Alpin sur les Réseaux Trophiques et Ecosystèmes Lacustre

Cyprus University of Technology

American Museum of Natural History

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The potential of High-Throughput Sequencing (HTS) of natural samples as a source of primary taxonomic information for reference libraries of diatom barcodes

Frédéric Rimet Nélida Abarca Agnès Bouchez Wolf‐Henning Kusber Regine Jahn

Diatoms are used routinely to assess pollution level in rivers and lakes.Current methods are based on identification by light microscopy, which is laborious.An alternative is to identify species based on short DNA fragments and High-Throughput Sequencing (HTS).However a potential limitation is the incomplete coverage of species in reference barcode libraries.Usually these libraries are compiled by isolating cells, before culturing and sequencing them, which is tedious and often unsuccessful.Here we propose the use of rbcL sequences from environmental samples analysed by HTS.We set several criteria to ensure good sequence quality and correspondence with the target species observed in microscopy: the sequence needed to be abundant in the sample, and with no insertions nor deletions or stop codon, phylogenetic neighbour taxa had to correspond to neighbour taxonomic taxa expected from morphological observations.Four species from tropical rivers are given as examples, including one that is new to science.

DNA Barcoding

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10.5507/fot.2017.013

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Citations (49)

Achnanthidium druartii sp. nov. (Achnanthales, Bacillariophyta), a new species invading European rivers.

HAL (Le Centre pour la Communication Scientifique Directe) (2010)

Frédéric Rimet Alain Couté André Piuz Vincent Berthon J.C. Druart

Since 2004, an unknown diatom taxon has been spreading through an increasing number of French watercourses. Our findings led us to describe it as a new species, Achnanthidium druartii sp. nov. This taxon can easily be differentiated from other morphologically closely related species like A. convergens, A. deflexum, A. japonicum, A. latecephalum, A. pyrenaicum and A. rivulare with both light and electron microscopy since its valve is longer, its stria density is lower and it has a lanceolate shape with subrostrated apices (never capitated). The assessment of its ecology was made through physicochemical analyses carried out on sites that are part of the river monitoring quality networks. The new taxon is an epilithic taxon, often observed in well mineralized waters running through sedimentary rock and of quite low trophic and saprobic levels. Many of the sites are large rivers and navigation channels. Considering the increasing number of stations where it was recorded and since it is only recently recorded in rivers, this taxon can be considered as invasive.

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Human induced harmful algal blooms

André Piuz Stéphane Kluser Pascal Peduzzi

The occurrence of coastal harmful algal blooms (HABs) over the last several decades has become a worldwide environmental concern. Some of these HABs are caused by anthropo- genic nutritient pollution and can harm whole marine ecosystems which, in the worst cases, may become devoid of life. Aside from biodiversity impacts, they can also menace coastal economies.

Marine life

Marine ecosystem

Marine Pollution

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Microcrystals coating the wing membranes of a living insect (Psocoptera: Psyllipsocidae) from a Brazilian cave

Scientific Reports (2012)

Charles Lienhard Rodrigo Lopes Ferreira Edwin Gnos John Hollier Urs Eggenberger

Two specimens of Psyllipsocus yucatan with black wings were found with normal individuals of this species on guano piles produced by the common vampire bat Desmodus rotundus. These specimens have both pairs of wings dorsally and ventrally covered by a black crystalline layer. They did not exhibit any signs of reduced vitality in the field and their morphology is completely normal. This ultrathin (1.5 µm) crystalline layer, naturally deposited on a biological membrane, is documented by photographs, SEM micrographs, energy dispersive spectroscopy (EDS) and X-ray diffractometry (XRD). The crystalline deposit contains iron, carbon and oxygen, but the mineral species could not be identified. Guano probably played a role in its formation; the presence of iron may be a consequence of the excretion of iron by the common vampire bat. This enigmatic phenomenon lacks obvious biological significance but may inspire bionic applications. Nothing similar has ever been observed in terrestrial arthropods.

Guano

Desmodus rotundus

Psocoptera

Morphology

Cuticle (hair)

10.1038/srep00408

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Citations (7)

Late Cretaceous (Cenomanian-Turonian) ammonites from southern Morocco and south western Algeria

Arabian Journal of Geosciences (2016)

Christian Meister André Piuz Lionel Cavin Larbi Boudad Flavio Bacchia

Cenomanian

Nautilus

Trough (economics)

10.1007/s12517-016-2714-1

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Citations (52)

Stratigraphic and sedimentological framework of the Tinrhert Plateau (Cenomanian–Turonian, SE Algeria)

Cretaceous Research (2019)

Madani Benyoucef Djamila Zaoui Mohammed Adaci Bruno Ferré Christian Meister

Cenomanian

Marl

Ammonite

Biozone

Lithostratigraphy

Red beds

10.1016/j.cretres.2019.01.006

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Citations (17)

Alveolinoid (Foraminifera) species from the Cenomanian of Oman: biostratigraphical markers for the Natih Formation

Vicent Vicedo André Piuz

Cenomanian

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Citations (1)

Vertebrate assemblages from the early Late Cretaceous of southeastern Morocco: An overview

Journal of African Earth Sciences (2009)

Lionel Cavin Haiyan Tong Larbi Boudad Christian Meister André Piuz

10.1016/j.jafrearsci.2009.12.007

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Citations (198)

Lithostratigraphie, biostratigraphie, cartographie et géologie structurale du Mont Salève, entre l'Arve et les Usses (Haute Savoie, France)

Zenodo (CERN European Organization for Nuclear Research) (2023)

Jean Charollais Bruno Mastrangelo André Strasser André Piuz Bruno Granier

10.5281/zenodo.7446048

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Cenomanian rotaliids (Foraminiferida) from Oman and Morocco

Swiss Journal of Palaeontology (2013)

André Piuz Christian Meister

Cenomanian

Subspecies

10.1007/s13358-013-0054-2

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Citations (15)