Zooplankton, phytoplankton and the microbial food web in two turbid and two clearwater shallow lakes in Belgium

K. Muylaert, S. Declerck, V. Geenens, J. Van Wichelen, H. Degans, J. Vandekerkhove, K. van der Gucht, N. Vloemans, W. Rommens, D. Rejas, R. Urrutia, K. Sabbe, M. Gillis, K. Decleer, Luc De Meester, W. Vyverman

    Research output: Contribution to journal/periodicalArticleScientificpeer-review

    Abstract

    Components of the pelagic food web in four eutrophic shallow lakes in two wetland reserves in Belgium ('Blankaart' and 'De Maten') were monitored during the course of 1998-1999. In each wetland reserve, a clearwater and a turbid lake were sampled. The two lakes in each wetland reserve had similar nutrient loadings and occurred in close proximity of each other. In accordance with the alternative stable states theory, food web structure differed strongly between the clearwater and turbid lakes. Phytoplankton biomass was higher in the turbid than the clearwater lakes. Whereas chlorophytes dominated the phytoplankton in the turbid lakes, cryptophytes were the most important phytoplankton group in the clearwater lakes. The biomass of microheterotrophs (bacteria, heterotrophic nanoflagellates and ciliates) was higher in the turbid than the clearwater lakes. Biomass and community composition of micro- and macrozooplankton was not clearly related to water clarity. The ratio of macrozooplankton to phytoplankton biomass - an indicator of zooplankton grazing pressure on phytoplankton was higher in the clearwater when compared to the turbid lakes. The factors potentially regulating water clarity, phytoplankton, microheterotrophs and macrozooplankton are discussed. Implications for the management of these lakes are discussed.
    Original languageEnglish
    Pages (from-to)137-150
    Number of pages14
    JournalAquatic Ecology
    Volume37
    Issue number2
    DOIs
    Publication statusPublished - 2003

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    Keywords

    • alternative stable states biomanipulation eutrophic shallow lakes macrophytes phytoplankton zooplankton eutrophic lake hypertrophic conditions community structure temperate lakes size-efficiency biomanipulation fish water restoration predation Environmental Sciences & Ecology Marine & Freshwater Biology

    Cite this

    Muylaert, K., Declerck, S., Geenens, V., Van Wichelen, J., Degans, H., Vandekerkhove, J., van der Gucht, K., Vloemans, N., Rommens, W., Rejas, D., Urrutia, R., Sabbe, K., Gillis, M., Decleer, K., De Meester, L., & Vyverman, W. (2003). Zooplankton, phytoplankton and the microbial food web in two turbid and two clearwater shallow lakes in Belgium. Aquatic Ecology, 37(2), 137-150. https://doi.org/10.1023/a:1023988702926