A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis

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Acta Protozoologica, 2016, Volume 55, Issue 2, pp. 61-87

https://doi.org/10.4467/16890027AP.16.007.4942

Published at: 25.08.2016

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A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis

Publication date: 25.08.2016

Acta Protozoologica, 2016, Volume 55, Issue 2, pp. 61 - 87

https://doi.org/10.4467/16890027AP.16.007.4942

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A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis

Abstract

The colonies of Microcystis, one of the most common bloom-forming cyanobacteria worldwide, harbor a diverse community of microorganisms. Among these, naked amoebae feeding on Microcystis cells can strongly influence natural Microcystis population dynamics. In this study, we investigated the species diversity of these amoebae based on 26 Microcystis-associated amoebae (MAA) strains from eutrophied water bodies in Belgium and elsewhere in western Europe. A detailed morphological characterization in combination with 18S rDNA (SSU) phylogenies revealed the presence of no less than 10 species. Nine of these belonged to the known genera Vannella (2 species), Korotnevella (2), Copromyxa (2), Vexillifera (1), Cochliopodium (1) and the recently described Angulamoeba (1). Only two were previously described, the others were new to science. One taxon could not be assigned to a known genus and is here described as Schoutedamoeba gen. n., representing a new variosean lineage. The discovery of so many new species from only one very specific habitat (Microcystis colonies) from a rather restricted geographical area indicates that the diversity of planktonic naked amoebae is much higher than previously appreciated and that only a tiny fraction of the total diversity of naked amoebae is currently known.

Keywords

Naked amoebae, Microcystis, morphology, 18S rDNA, harmful algal blooms, grazing, Europe

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Information

Information: Acta Protozoologica, 2016, Volume 55, Issue 2, pp. 61 - 87

DOI: https://doi.org/10.4467/16890027AP.16.007.4942

Article type: Original article

Authors

Jeroen van Wichelen

Research Unit of Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium

Sofie d’Hondt

Research Unit of Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium

Research Unit of Nematology, Biology Department, Ghent University, K.L. Ledeganckstraat 35, 9000 Gent, Belgium

Research Unit of Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium

Groupe EPEP, UMR7144, CNRS / UPMC Paris 6, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France

Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom

Pieter Vanormelingen

Research Unit of Protistology and Aquatic Ecology, Biology Department, Ghent University, Krijgslaan 281 (S8), 9000 Gent, Belgium

Published at: 25.08.2016

Article status: Open

Licence: None

Percentage share of authors:

Jeroen van Wichelen (Author) - 14%

Sofie d’Hondt (Author) - 14%

Myriam Claeys (Author) - 14%

Wim Vyverman (Author) - 14%

Cédric Berney (Author) - 14%

David Bass (Author) - 14%

Pieter Vanormelingen (Author) - 16%

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<p> A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium <em>Microcystis</em></p>

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