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Dumack K, Lara E, Duckert C, Ermolaeva E, Siemensma F, Singer D, Krashevska V, Lamentowicz M, Mitchell EAD. It's time to consider the Arcellinida shell as a weapon. Eur J Protistol 2024; 92:126051. [PMID: 38194835 DOI: 10.1016/j.ejop.2024.126051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/29/2023] [Accepted: 01/01/2024] [Indexed: 01/11/2024]
Abstract
The shells of testate amoebae are morphologically diverse and persistent in the environment. Accordingly, the examination of the morphology and composition of shells became a standard tool in ecological, palaeoecological, and evolutionary studies. However, so far the function of the shell remains poorly understood and, although based on limited evidence, the shell was considered as a defense mechanism. Based on recent evidence, we propose that the shell of arcellinid testate amoebae is a crucial component facilitating the amoebae's attack of large prey. Accordingly, the shell is not purely protective, but must be considered also as a weapon. This change in perspective opens up numerous new avenues in protistology and will lead to a substantial change in ecological, palaeoecological, and evolutionary research.
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Affiliation(s)
- Kenneth Dumack
- Terrestrial Ecology, Zülpicher Straße 47b, University of Cologne, Germany.
| | - Enrique Lara
- Real Jardín Botánico-CSIC, C. Moyano 1 28014, Madrid, Spain
| | - Clément Duckert
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile Argand 11 2000, Neuchâtel, Switzerland
| | - Elizaveta Ermolaeva
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile Argand 11 2000, Neuchâtel, Switzerland
| | | | - David Singer
- Soil Science and Environment Group, Changins, HES-SO University of Applied Sciences and Arts Western Switzerland, Nyon, Switzerland
| | - Valentyna Krashevska
- Senckenberg Biodiversity and Climate Research Centre, Functional Environmental Genomics, Senckenberganlage 25 60325, Frankfurt, Germany
| | - Mariusz Lamentowicz
- Climate Change Ecology Research Unit, Faculty of Geographical and Geological Sciences Adam Mickiewicz University in Poznan, Bogumiła Krygowskiego 10 61-680, Poznan, Poland
| | - Edward A D Mitchell
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile Argand 11 2000, Neuchâtel, Switzerland
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González-Miguéns R, Todorov M, Blandenier Q, Duckert C, Porfirio-Sousa AL, Ribeiro GM, Ramos D, Lahr DJG, Buckley D, Lara E. Deconstructing Difflugia: The tangled evolution of lobose testate amoebae shells (Amoebozoa: Arcellinida) illustrates the importance of convergent evolution in protist phylogeny. Mol Phylogenet Evol 2022; 175:107557. [PMID: 35777650 DOI: 10.1016/j.ympev.2022.107557] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/25/2022] [Accepted: 05/31/2022] [Indexed: 10/17/2022]
Abstract
Protists, the micro-eukaryotes that are neither plants, animals nor fungi build up the greatest part of eukaryotic diversity on Earth. Yet, their evolutionary histories and patterns are still mostly ignored, and their complexity overlooked. Protists are often assumed to keep stable morphologies for long periods of time (morphological stasis). In this work, we test this paradigm taking Arcellinida testate amoebae as a model. We build a taxon-rich phylogeny based on two mitochondrial (COI and NADH) and one nuclear (SSU) gene, and reconstruct morphological evolution among clades. In addition, we prove the existence of mitochondrial mRNA editing for the COI gene. The trees show a lack of conservatism of shell outlines within the main clades, as well as a widespread occurrence of morphological convergences between far-related taxa. Our results refute, therefore, a widespread morphological stasis, which may be an artefact resulting from low taxon coverage. As a corollary, we also revise the groups systematics, notably by emending the large and highly polyphyletic genus Difflugia. These results lead, amongst others, to the erection of a new infraorder Cylindrothecina, as well as two new genera Cylindrifflugia and Golemanskia.
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Affiliation(s)
| | - Milcho Todorov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Science, 1113 Sofia, Bulgaria
| | - Quentin Blandenier
- Laboratory of Soil Biodiversity, University of Neuchâtel, Emile-Argand 11, 2000 Neuchâtel, Switzerland
| | - Clément Duckert
- Laboratory of Soil Biodiversity, University of Neuchâtel, Emile-Argand 11, 2000 Neuchâtel, Switzerland
| | | | - Giulia M Ribeiro
- Department of Zoology, Institute of Biosciences, University of São Paulo, Brazil
| | - Diana Ramos
- Real Jardín Botánico (RJB-CSIC), Plaza Murillo 2, 28014 Madrid, Spain
| | - Daniel J G Lahr
- Department of Zoology, Institute of Biosciences, University of São Paulo, Brazil
| | - David Buckley
- Department of Biology (Genetics), Universidad Autónoma de Madrid, Spain; Centro de Investigación en Biodiversidad y Cambio Global (CIBC-UAM), Universidad Autónoma de Madrid, Spain
| | - Enrique Lara
- Real Jardín Botánico (RJB-CSIC), Plaza Murillo 2, 28014 Madrid, Spain.
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Bobrov A, Duckert C, Mitchell EAD. Certesella larai (Amoebozoa: Arcellinida: Hyalospheniformes) a new soil testate amoeba species from the Dominican Republic and Chile challenges the definition of genera Certesella and Porosia. ACTA PROTOZOOL 2022. [DOI: 10.4467/16890027ap.21.007.15381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microbial diversity is known to be huge but remains only partly documented. Testate amoebae are a relatively well studied group or free-living protists that build morphologically characteristic shells on which the taxonomy of this group is mainly based. Among testate amoebae, the Hyalospheniformes are especially well documented and are a model group for microbial biogeography. Here we describe a new species of genus Certesella from Sphagnum mosses and forest litter samples collected in the Dominican Republic and Chile. We name this species Certesella larai to honour our esteemed colleague Enrique Lara. This species bears two large pores connected by tube, which are characteristic of the genera Porosia and Certesella. The new species fits best in the latter genus given the presence of a distinct, sometimes denticulated, neck with a bulge that is absent in genus Porosia but occurs in Certesella. Its elongated shape (length/breadth ratio 2.03–2.58) only overlaps with C. certesi, which is distinguishable by the presence of a distinct longitudinal groove in the neck region that is absent from the new species. Interestingly most specimens lacked the internal teeth which are usually present in members of genus Certesella. As such, while the morphology of C. larai strongly suggests a belonging to genus Certesella, molecular analyses are still required to confirm its phylogenetic position, clarify the relationships among all species in genera Porosia and Certesella and the definition and validity of these two genera. The presence of this new species in two rather distant regions – Caribbean and central Chile – suggests it is likely widespread, but possibly rare. However, this perception may be due to a sampling bias in favour of Sphagnum mosses and wet and organic-rich habitats. This illustrates the need for a more systematic sampling effort to document the full and mostly unknown taxonomic diversity of soil protists.
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Affiliation(s)
- Anatoly Bobrov
- Department of Soil Science, Lomonosov Moscow State University, Leninskiye gory, Moscow, Russia
| | - Clément Duckert
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland
| | - Edward A. D. Mitchell
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland
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McKeown MM, Mitchell EA, Amesbury MJ, Blandenier Q, Charman D, Duckert C, Roland TP, Swindles GT, Wood JR, Wilmshurst JM. The testate amoebae of New Zealand: A checklist, identification key and assessment of biogeographic patterns. Eur J Protistol 2021; 81:125789. [DOI: 10.1016/j.ejop.2021.125789] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 02/25/2021] [Accepted: 03/04/2021] [Indexed: 10/21/2022]
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Duckert C, Blandenier Q, McKeown M, Hohaia H, Luketa S, Wilmshurst J, Lara E, Mitchell EAD. Superficially described and ignored for 92 years, rediscovered and emended: Apodera angatakere (Amoebozoa: Arcellinida: Hyalospheniformes) is a new flagship testate amoeba taxon from Aotearoa (New Zealand). J Eukaryot Microbiol 2021; 68:e12867. [PMID: 34351666 PMCID: PMC9292727 DOI: 10.1111/jeu.12867] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 07/07/2021] [Indexed: 11/30/2022]
Abstract
Eukaryotic microbial diversity is known to be extensive but remains largely undescribed and uncharted. While much of this unknown diversity is composed of inconspicuous flagellates and parasites, larger and morphologically distinct protists are regularly discovered, most notably from poorly studied regions. Here we report a new flagship species of hyalospheniid (Amoebozoa; Arcellinida; Hyalospheniformes) testate amoeba from New Zealand and an unusual story of overlooked description under a preoccupied name and subsequent oversight for nearly one century. Through a process involving The Māori Language Commission, we named the species Apodera angatakere, meaning "a shell with a keel." This species resembles Apodera vas but differs by the presence of a distinctive hollow keel. Cytochrome Oxidase Subunit 1 (COI) sequence data show that this species forms a distinct clade nested within genus Apodera. This conspicuous species is so far known only from New Zealand and is restricted to peatlands. It is one of the few examples of endemic microorganisms from this biodiversity hotspot and biogeographer's paradise. As over 90% of New Zealand's peatlands have been lost since European colonization and much of the remaining surfaces are threatened, Apodera angatakere could be a flagship species not only for microbial biogeography but also for island biodiversity conservation.
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Affiliation(s)
- Clément Duckert
- Laboratory of Soil Biodiversity, University of Neuchâtel, Neuchâtel, Switzerland
| | - Quentin Blandenier
- Laboratory of Soil Biodiversity, University of Neuchâtel, Neuchâtel, Switzerland
| | - Michelle McKeown
- Manaaki Whenua - Landcare Research, Lincoln, New Zealand.,Wallbridge Gilbert Aztec, Christchurch, New Zealand
| | - Holden Hohaia
- Manaaki Whenua/Landcare Research, Wellington, New Zealand
| | - Stefan Luketa
- Laboratory of Soil Biodiversity, University of Neuchâtel, Neuchâtel, Switzerland.,Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Janet Wilmshurst
- Manaaki Whenua - Landcare Research, Lincoln, New Zealand.,School of Environment, The University of Auckland, Auckland, New Zealand
| | | | - Edward A D Mitchell
- Laboratory of Soil Biodiversity, University of Neuchâtel, Neuchâtel, Switzerland.,Jardin Botanique de Neuchâtel, Neuchâtel, Switzerland
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Singer D, Seppey CVW, Lentendu G, Dunthorn M, Bass D, Belbahri L, Blandenier Q, Debroas D, de Groot GA, de Vargas C, Domaizon I, Duckert C, Izaguirre I, Koenig I, Mataloni G, Schiaffino MR, Mitchell EAD, Geisen S, Lara E. Protist taxonomic and functional diversity in soil, freshwater and marine ecosystems. Environ Int 2021; 146:106262. [PMID: 33221595 DOI: 10.1016/j.envint.2020.106262] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 10/31/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
Protists dominate eukaryotic diversity and play key functional roles in all ecosystems, particularly by catalyzing carbon and nutrient cycling. To date, however, a comparative analysis of their taxonomic and functional diversity that compares the major ecosystems on Earth (soil, freshwater and marine systems) is missing. Here, we present a comparison of protist diversity based on standardized high throughput 18S rRNA gene sequencing of soil, freshwater and marine environmental DNA. Soil and freshwater protist communities were more similar to each other than to marine protist communities, with virtually no overlap of Operational Taxonomic Units (OTUs) between terrestrial and marine habitats. Soil protists showed higher γ diversity than aquatic samples. Differences in taxonomic composition of the communities led to changes in a functional diversity among ecosystems, as expressed in relative abundance of consumers, phototrophs and parasites. Phototrophs (eukaryotic algae) dominated freshwater systems (49% of the sequences) and consumers soil and marine ecosystems (59% and 48%, respectively). The individual functional groups were composed of ecosystem- specific taxonomic groups. Parasites were equally common in all ecosystems, yet, terrestrial systems hosted more OTUs assigned to parasites of macro-organisms while aquatic systems contained mostly microbial parasitoids. Together, we show biogeographic patterns of protist diversity across major ecosystems on Earth, preparing the way for more focused studies that will help understanding the multiple roles of protists in the biosphere.
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Affiliation(s)
- David Singer
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland; Department of Zoology, Institute of Biosciences, University of São Paulo, 05508-090, Brazil; UMR CNRS 6112 LPG-BIAF, Université d'Angers, Angers Cedex 1, France.
| | - Christophe V W Seppey
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland; Department of Arctic and Marine Biology, University of Tromsø, Framstredet 39, 9019 Tromsø, Norway.
| | - Guillaume Lentendu
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Micah Dunthorn
- Department of Eukaryotic Microbiology, University of Duisburg-Essen, D-45141 Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, D-45141 Essen, Germany
| | - David Bass
- Department of Life Sciences, The Natural History Museum, London, UK
| | - Lassâad Belbahri
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Quentin Blandenier
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland; Real Jardín Botánico de Madrid, CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - Didier Debroas
- Université Clermont Auvergne, CNRS, Laboratoire Microorganismes: Genome et Environnement, F-63000 Clermont-Ferrand, France
| | - G Arjen de Groot
- Wageningen Environmental Research, Wageningen UR, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Colomban de Vargas
- Sorbonne Université, CNRS, Station Biologique de Roscoff, UMR 7144, ECOMAP, 29680 Roscoff, France; Research Federation for the study of Global Ocean Systems Ecology and Evolution, FR2022/GOSEE, 3 rue Michel-Ange, 75016 Paris, France
| | - Isabelle Domaizon
- Université Savoie Mont Blanc, INRAE, CARRTEL, 74200 Thonon-les-Bains, France
| | - Clément Duckert
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Irina Izaguirre
- Departamento de Ecología, Genética y Evolución, IEGEBA (UBA-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Isabelle Koenig
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Gabriela Mataloni
- Instituto de Investigación e Ingeniería Ambiental (IIIA), CONICET, Universidad Nacional de San Martín, Provincia de Buenos Aires 1650, Argentina
| | - M Romina Schiaffino
- Universidad Nacional del Noroeste de la Provincia de Buenos Aires, Centro de Investigaciones y transferencia del Noroeste de la Provincia de Buenos Aires (CITNOBA) - UNNOBA-UNSAdA-CONICET, Junín 6000, Argentina
| | - Edward A D Mitchell
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland; Jardin Botanique de Neuchâtel, Chemin du Perthuis-du-Sault 58, CH-2000 Neuchâtel, Switzerland
| | - Stefan Geisen
- Laboratory of Nematology, Wageningen University and Research, Droevendaalsesteeg 1, 6708PB Wageningen, the Netherlands.
| | - Enrique Lara
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland; Real Jardín Botánico de Madrid, CSIC, Plaza de Murillo 2, 28014 Madrid, Spain.
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7
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Dumack K, Duckert C, Meinhardt R, Lara E, Bonkowski M. Description of Phaeobola aeris gen. nov., sp. nov (Rhizaria, Cercozoa, Euglyphida) Sheds Light on Euglyphida's Dark Matter. J Eukaryot Microbiol 2020; 68:e12835. [PMID: 33222324 DOI: 10.1111/jeu.12835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 10/06/2020] [Accepted: 10/26/2020] [Indexed: 11/30/2022]
Abstract
The majority of Euglyphida species are characterised by shells with imbricated silica scales. Environmental surveys indicate a large unexplored diversity and recent efforts hinted at a certain diversity of yet undescribed, inconspicuous, scale-lacking Euglyphida. Here we describe Phaeobola aeris gen. nov., sp. nov. that shows a variety of morphological characters typical for the Euglyphida but lacks silica scales-instead, this species bears an agglutinated test. Neither its morphology nor phylogenetic placement allows its assignment to any currently described family. We erected the yet monospecific genus Phaeobola gen. nov., which with yet available data remain Euglyphida incertae sedis.
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Affiliation(s)
- Kenneth Dumack
- Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, Köln, 50674, Germany
| | - Clément Duckert
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, Neuchâtel, CH-2000, Switzerland
| | - Raphaela Meinhardt
- Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, Köln, 50674, Germany
| | - Enrique Lara
- Real Jardín Botánico, CSIC, Plaza de Murillo 2, Madrid, 28014, Spain
| | - Michael Bonkowski
- Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, Köln, 50674, Germany
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Duckert C, Blandenier Q, Kupferschmid FA, Kosakyan A, Mitchell EAD, Lara E, Singer D. Case 3782 – Nebela militaris Penard, 1890 (Arcellinida, Hyalospheniidae): proposed conservation of the specific name by giving it precedence over Nebela bursella Taranek, 1881. ACTA ACUST UNITED AC 2020. [DOI: 10.21805/bzn.v77.a007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Clément Duckert
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Émile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Quentin Blandenier
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Émile-Argand 11, CH-2000 Neuchâtel, Switzerland / Real Jardín Botánico, CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - Fanny A.L. Kupferschmid
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Émile-Argand 11, CH-2000 Neuchâtel, Switzerland
| | - Anush Kosakyan
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, České Budějovice 37005 Czech Republic
| | - Edward A. D. Mitchell
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Émile-Argand 11, CH-2000 Neuchâtel, Switzerland / Jardin Botanique de Neuchâtel, Chemin du Perthuis-du-Sault 58, CH-2000 Neuchâtel, Switzerland
| | - Enrique Lara
- Real Jardín Botánico, CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - David Singer
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Émile-Argand 11, CH-2000 Neuchâtel, Switzerland / Department of Zoology, Institute of Biosciences, University of São Paulo, Brazil
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Duckert C. Comment on "Amoebae Assemble Synthetic Spherical Particles To Form Reproducible Constructs". Langmuir 2020; 36:4563. [PMID: 32223164 DOI: 10.1021/acs.langmuir.0c00139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Clément Duckert
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland
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10
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Macumber AL, Blandenier Q, Todorov M, Duckert C, Lara E, Lahr DJ, Mitchell EA, Roe HM. Phylogenetic divergence within the Arcellinida (Amoebozoa) is congruent with test size and metabolism type. Eur J Protistol 2020; 72:125645. [DOI: 10.1016/j.ejop.2019.125645] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 10/01/2019] [Accepted: 10/14/2019] [Indexed: 12/21/2022]
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Singer D, Mitchell EAD, Payne RJ, Blandenier Q, Duckert C, Fernández LD, Fournier B, Hernández CE, Granath G, Rydin H, Bragazza L, Koronatova NG, Goia I, Harris LI, Kajukało K, Kosakyan A, Lamentowicz M, Kosykh NP, Vellak K, Lara E. Dispersal limitations and historical factors determine the biogeography of specialized terrestrial protists. Mol Ecol 2019; 28:3089-3100. [DOI: 10.1111/mec.15117] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 12/26/2022]
Affiliation(s)
- David Singer
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
- Department of Zoology, Institute of Biosciences University of São Paulo São Paulo Brazil
| | - Edward A. D. Mitchell
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
- Jardin Botanique de Neuchâtel Neuchâtel Switzerland
| | | | - Quentin Blandenier
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
- Real Jardín Botánico CSIC Madrid Spain
| | - Clément Duckert
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
| | - Leonardo D. Fernández
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
- Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS) Universidad Bernardo O'Higgins Santiago Chile
| | - Bertrand Fournier
- Community and Quantitative Ecology Laboratory, Department of Biology Concordia University Montreal QC Canada
| | - Cristián E. Hernández
- Facultad de Ciencias Naturales y Oceanográficas, Departamento de Zoología Universidad de Concepción Barrio Universitario de Concepción Chile
| | - Gustaf Granath
- Department of Ecology and Genetics Evolutionary Biology Centre Uppsala University Uppsala Sweden
| | - Håkan Rydin
- Department of Ecology and Genetics Evolutionary Biology Centre Uppsala University Uppsala Sweden
| | - Luca Bragazza
- WSL Swiss Federal Institute for Forest, Snow and Landscape Research Lausanne Switzerland
- Laboratory of Ecological Systems (ECOS), Ecole Polytechnique Féderale de Lausanne (EPFL) School of Architecture, Civil and Environmental Engineering (ENAC) Lausanne Switzerland
- Department of Life Science and Biotechnologies University of Ferrara Ferrara Italy
| | - Natalia G. Koronatova
- Laboratory of Biogeocenology, Institute of Soil Science and Agrochemistry Siberian Branch of Russian Academy of Sciences Novosibirsk Russia
| | - Irina Goia
- Department of Taxonomy and Ecology, Faculty of Biology and Geology Babeș‐Bolyai University Cluj‐Napoca Romania
| | - Lorna I. Harris
- School of Geography and Earth Sciences McMaster University Hamilton ON Canada
| | - Katarzyna Kajukało
- Laboratory of Wetland Ecology and Monitoring, Faculty of Geographical and Geological Sciences and Department of Biogeography and Paleoecology Adam Mickiewicz University Poznań Poland
| | - Anush Kosakyan
- Institute of Parasitology, Biology Center Czech Academy of Sciences České Budĕjovice Czech Republic
| | - Mariusz Lamentowicz
- Laboratory of Wetland Ecology and Monitoring, Faculty of Geographical and Geological Sciences and Department of Biogeography and Paleoecology Adam Mickiewicz University Poznań Poland
| | - Natalia P. Kosykh
- Laboratory of Biogeocenology, Institute of Soil Science and Agrochemistry Siberian Branch of Russian Academy of Sciences Novosibirsk Russia
| | - Kai Vellak
- Institute of Ecology and Earth Sciences, Natural History Museum University of Tartu Tartu Estonia
| | - Enrique Lara
- Laboratory of Soil Biodiversity, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
- Real Jardín Botánico CSIC Madrid Spain
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12
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McKeown MM, Wilmshurst JM, Duckert C, Wood JR, Mitchell EA. Assessing the ecological value of small testate amoebae (<45 μm) in New Zealand peatlands. Eur J Protistol 2019; 68:1-16. [DOI: 10.1016/j.ejop.2018.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/11/2018] [Accepted: 12/12/2018] [Indexed: 11/16/2022]
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Blandenier Q, Seppey CVW, Singer D, Vlimant M, Simon A, Duckert C, Lara E. Mycamoeba gemmipara nov. gen., nov. sp., the First Cultured Member of the Environmental Dermamoebidae Clade LKM74 and its Unusual Life Cycle. J Eukaryot Microbiol 2016; 64:257-265. [PMID: 27543384 DOI: 10.1111/jeu.12357] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/04/2016] [Accepted: 08/08/2016] [Indexed: 11/30/2022]
Abstract
Since the first environmental DNA surveys, entire groups of sequences called "environmental clades" did not have any cultured representative. LKM74 is an amoebozoan clade affiliated to Dermamoebidae, whose presence is pervasively reported in soil and freshwater. We obtained an isolate from soil that we assigned to LKM74 by molecular phylogeny, close related to freshwater clones. We described Mycamoeba gemmipara based on observations made with light- and transmission electron microscopy. It is an extremely small amoeba with typical lingulate shape. Unlike other Dermamoebidae, it lacked ornamentation on its cell membrane, and condensed chromatin formed characteristic patterns in the nucleus. M. gemmipara displayed a unique life cycle: trophozoites formed walled coccoid stages which grew through successive buddings and developed into branched structures holding cysts. These structures, measuring hundreds of micrometres, are built as the exclusive product of osmotrophic feeding. To demonstrate that M. gemmipara is a genuine soil inhabitant, we screened its presence in an environmental soil DNA diversity survey performed on an experimental setup where pig cadavers were left to decompose in soils to follow changes in eukaryotic communities. Mycamoeba gemmipara was present in all samples, although related reads were uncommon underneath the cadaver.
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Affiliation(s)
- Quentin Blandenier
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - Christophe V W Seppey
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - David Singer
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - Michèle Vlimant
- Laboratory of Ecology and Evolution of Parasites, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - Anaële Simon
- Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - Clément Duckert
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
| | - Enrique Lara
- Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Emile Argand 11, Neuchâtel, 2000, Switzerland
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Duckert C, Jespers C. [Caring for a patient at home at the end of his life. "I have to catch a train..."]. Krankenpfl Soins Infirm 1998; 91:66-70. [PMID: 10076296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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