Structure and seasonal dynamics of the protozoan community (heterotrophic flagellates, ciliates, amoeboid protozoa) in the plankton of a large river (River Danube, Hungary)

Áron Keve Kiss, E. Ács, K. Kiss, Júlia Katalin Török

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Seasonal dynamics of all major protozoan groups were investigated in the plankton of the River Danube, upstream of Budapest (Hungary), by bi-weekly sampling over a 1-year long period. Sixty-one heterotrophic flagellate, 14 naked amoeba, 50 testate amoeba, 4 heliozoan and 83 ciliate morphospecies were identified. The estimated abundance ranges of major groups throughout the year were as follows: heterotrophic flagellates, 0.27-7.8×106 ind. l-1; naked amoebae, max. 3300 ind. l-1; testaceans, max. 1600 ind. l-1; heliozoans, max. 8500 ind. l-1; ciliates, 132-34,000 ind. l-1. In terms of biovolume, heterotrophic flagellates dominated throughout the year (max. 0.58 mm3 l-1), and ciliates only exceeded their biovolume in summer (max. 0.76 mm3 l-1). Naked amoeba and heliozoan biovolume was about one, and testacean biovolume 1-3, orders of magnitude lower than that of ciliates. In winter, flagellates, mainly chrysomonads, had the highest biomass, whilst ciliates were dominated by peritrichs. In 2005 from April to July a long spring/summer peak occurred for all protozoan groups. Beside chrysomonads typical flagellates were choanoflagellates, bicosoecids and abundant microflagellates (large chrysomonads and Collodictyon). Most abundant ciliates were oligotrichs, while Phascolodon, Urotricha, Vorticella, haptorids, Suctoria, Climacostomum and Stokesia also contributed significantly to biovolume during rapid succession processes. In October and November a second high protozoan peak occurred, with flagellate dominance, and slightly different taxonomic composition.

Original languageEnglish
Pages (from-to)121-138
Number of pages18
JournalEuropean Journal of Protistology
Volume45
Issue number2
DOIs
Publication statusPublished - May 2009

Fingerprint

Plankton
Amoeba
Hungary
Rivers
Kinetofragminophorea
Choanoflagellata
Biomass

Keywords

  • Ciliates
  • Heterotrophic flagellates
  • Naked amoebae
  • River protozoa
  • Seasonal succession
  • Testate amoebae

ASJC Scopus subject areas

  • Microbiology

Cite this

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title = "Structure and seasonal dynamics of the protozoan community (heterotrophic flagellates, ciliates, amoeboid protozoa) in the plankton of a large river (River Danube, Hungary)",
abstract = "Seasonal dynamics of all major protozoan groups were investigated in the plankton of the River Danube, upstream of Budapest (Hungary), by bi-weekly sampling over a 1-year long period. Sixty-one heterotrophic flagellate, 14 naked amoeba, 50 testate amoeba, 4 heliozoan and 83 ciliate morphospecies were identified. The estimated abundance ranges of major groups throughout the year were as follows: heterotrophic flagellates, 0.27-7.8×106 ind. l-1; naked amoebae, max. 3300 ind. l-1; testaceans, max. 1600 ind. l-1; heliozoans, max. 8500 ind. l-1; ciliates, 132-34,000 ind. l-1. In terms of biovolume, heterotrophic flagellates dominated throughout the year (max. 0.58 mm3 l-1), and ciliates only exceeded their biovolume in summer (max. 0.76 mm3 l-1). Naked amoeba and heliozoan biovolume was about one, and testacean biovolume 1-3, orders of magnitude lower than that of ciliates. In winter, flagellates, mainly chrysomonads, had the highest biomass, whilst ciliates were dominated by peritrichs. In 2005 from April to July a long spring/summer peak occurred for all protozoan groups. Beside chrysomonads typical flagellates were choanoflagellates, bicosoecids and abundant microflagellates (large chrysomonads and Collodictyon). Most abundant ciliates were oligotrichs, while Phascolodon, Urotricha, Vorticella, haptorids, Suctoria, Climacostomum and Stokesia also contributed significantly to biovolume during rapid succession processes. In October and November a second high protozoan peak occurred, with flagellate dominance, and slightly different taxonomic composition.",
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T1 - Structure and seasonal dynamics of the protozoan community (heterotrophic flagellates, ciliates, amoeboid protozoa) in the plankton of a large river (River Danube, Hungary)

AU - Kiss, Áron Keve

AU - Ács, E.

AU - Kiss, K.

AU - Török, Júlia Katalin

PY - 2009/5

Y1 - 2009/5

N2 - Seasonal dynamics of all major protozoan groups were investigated in the plankton of the River Danube, upstream of Budapest (Hungary), by bi-weekly sampling over a 1-year long period. Sixty-one heterotrophic flagellate, 14 naked amoeba, 50 testate amoeba, 4 heliozoan and 83 ciliate morphospecies were identified. The estimated abundance ranges of major groups throughout the year were as follows: heterotrophic flagellates, 0.27-7.8×106 ind. l-1; naked amoebae, max. 3300 ind. l-1; testaceans, max. 1600 ind. l-1; heliozoans, max. 8500 ind. l-1; ciliates, 132-34,000 ind. l-1. In terms of biovolume, heterotrophic flagellates dominated throughout the year (max. 0.58 mm3 l-1), and ciliates only exceeded their biovolume in summer (max. 0.76 mm3 l-1). Naked amoeba and heliozoan biovolume was about one, and testacean biovolume 1-3, orders of magnitude lower than that of ciliates. In winter, flagellates, mainly chrysomonads, had the highest biomass, whilst ciliates were dominated by peritrichs. In 2005 from April to July a long spring/summer peak occurred for all protozoan groups. Beside chrysomonads typical flagellates were choanoflagellates, bicosoecids and abundant microflagellates (large chrysomonads and Collodictyon). Most abundant ciliates were oligotrichs, while Phascolodon, Urotricha, Vorticella, haptorids, Suctoria, Climacostomum and Stokesia also contributed significantly to biovolume during rapid succession processes. In October and November a second high protozoan peak occurred, with flagellate dominance, and slightly different taxonomic composition.

AB - Seasonal dynamics of all major protozoan groups were investigated in the plankton of the River Danube, upstream of Budapest (Hungary), by bi-weekly sampling over a 1-year long period. Sixty-one heterotrophic flagellate, 14 naked amoeba, 50 testate amoeba, 4 heliozoan and 83 ciliate morphospecies were identified. The estimated abundance ranges of major groups throughout the year were as follows: heterotrophic flagellates, 0.27-7.8×106 ind. l-1; naked amoebae, max. 3300 ind. l-1; testaceans, max. 1600 ind. l-1; heliozoans, max. 8500 ind. l-1; ciliates, 132-34,000 ind. l-1. In terms of biovolume, heterotrophic flagellates dominated throughout the year (max. 0.58 mm3 l-1), and ciliates only exceeded their biovolume in summer (max. 0.76 mm3 l-1). Naked amoeba and heliozoan biovolume was about one, and testacean biovolume 1-3, orders of magnitude lower than that of ciliates. In winter, flagellates, mainly chrysomonads, had the highest biomass, whilst ciliates were dominated by peritrichs. In 2005 from April to July a long spring/summer peak occurred for all protozoan groups. Beside chrysomonads typical flagellates were choanoflagellates, bicosoecids and abundant microflagellates (large chrysomonads and Collodictyon). Most abundant ciliates were oligotrichs, while Phascolodon, Urotricha, Vorticella, haptorids, Suctoria, Climacostomum and Stokesia also contributed significantly to biovolume during rapid succession processes. In October and November a second high protozoan peak occurred, with flagellate dominance, and slightly different taxonomic composition.

KW - Ciliates

KW - Heterotrophic flagellates

KW - Naked amoebae

KW - River protozoa

KW - Seasonal succession

KW - Testate amoebae

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