, Volume 523, Issue 1–3, pp 217–223 | Cite as

Factors Influencing Algae–Clay Aggregation

  • Mariana Guenther
  • Reinaldo Bozelli


The dumping of bauxite tailings on a clear-water Amazonian lake caused a significant decrease in phytoplankton densities. The influence of these suspended clay particles on algal sinking, through algae–clay aggregation, was investigated under laboratory conditions, by measuring fluctuations in algal population densities over time, with different suspended clay concentrations. The population densities of the four algal species tested, Phormidium amoenum, Mougeotia sp., Staurodesmus convergens and Chlorella sp., were decreased by the algae–clay aggregation. The extent of this process was dependent on algal morphological characteristics such as size and shape, as well as on the concentration of suspended clay particles.

algae clay kaolin aggregation turbidity Amazon 


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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Mariana Guenther
    • 1
  • Reinaldo Bozelli
    • 2
  1. 1.Laboratório de Zooplâncton, Departamento de Biologia Marinha, Instituto de BiologiaUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
  2. 2.Laboratório de Limnologia, Departmento de EcologiaInstituto de Biologia, Universidade Federal do Rio de Janeiro, Ilha do FundãoRio de JaneiroBrazil

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