Distributions and Biomass of Benthic Ciliates, Foraminifera and Amoeboid Protists in Marine, Brackish, and Freshwater Sediments

Titel in Übersetzung: Distributions and Biomass of Benthic Ciliates, Foraminifera and Amoeboid Protists in Marine, Brackish, and Freshwater Sediments

Yan-Li Lei, Karen Stumm, Stephen A. Wickham, Ulrike- G. Berninger

    Publikation: Beitrag in FachzeitschriftArtikel

    Abstract

    The quantitative importance of ciliates, foraminifers, and amoebae was investigated in marine, brackish, and freshwater sediments from 15 littoral stations. Total protozoan communities were usually dominated by ciliates in term of abundance, while amoebae often dominated in terms of biomass. Applying the biomass-metabolic rate equation, ciliates, amoebae, and foraminifera were estimated to contribute 66% of the total abundance and 33% of the biomass, but up to 55% of the combined metabolic rate to the micro- and meiobenthos in the 15 sediments. Statistical analyses using ciliate data demonstrated: (1) species composition and community structures represented significant differences between freshwater and marine/brackish sediments, and subsequently between temperate and arctic sampling sites; (2) the occurrence of dominant ciliates and their allocation to feeding types indicated that herbivory was the most common feeding strategy in these sediments; (3) multivariate analyses showed all of the tested environmental factors (temperature, salinity, silt/clay, carbon, nitrogen, and chlorophyll a) to be important to varying degrees, but especially the combination of salinity, temperature, and silt/clay. Multiple factor effects or comprehensive influences might be important in regulating the distribution of protozoa in sediments. The importance of protozoa in sediment systems and the potential ecological significance of cysts are discussed.
    Titel in ÜbersetzungDistributions and Biomass of Benthic Ciliates, Foraminifera and Amoeboid Protists in Marine, Brackish, and Freshwater Sediments
    OriginalspracheEnglisch
    Seiten (von - bis)493-508
    Seitenumfang16
    FachzeitschriftJournal of Eukaryotic Microbiology
    Jahrgang61
    Ausgabenummer5
    DOIs
    PublikationsstatusVeröffentlicht - 2014

    Systematik der Wissenschaftszweige 2012

    • 106 Biologie

    Schlagwörter

    • Amoebae benthic microbial food web diversity field ecology

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