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Hydrobiologia

, Volume 267, Issue 1–3, pp 99–112 | Cite as

Effects of microbial activity on the hydrochemistry and sedimentology of Lake Logipi, Kenya

  • Sabine Castanier
  • Marie-Claire Bernet-Rollande
  • André Maurin
  • Jean-Pierre Perthuisot
Article

Abstract

Lake Logipi is a saline soda and alkaline lake which marks the northern termination of the Suguta River drainage system. It also receives waters from streams, possible seepage from Lake Turkana, and hot springs. Present hydrochemistry and sedimentology is controlled by numerous factors including seasonal variations, composition of incoming waters, water depth and, above all, bacterial activity. Given the scarcity of Ca2+ and Mg2+ in the lake waters, bacterial activity seems to intensify the alkalinization of the waters which inhibits the deposition of organic matter and leads to the genesis of a poorly organic, zeolitic mud that reaches 1.5 m in tickness in the deepest part of the lake. This black layer may be overlaid with thin crusts of trona and halite which prograde over the basin from its southern bank when the lake is drying out and which are dissolved in the lake waters during the rainy season.

Key words

soda lake bacteria sediment recent Kenya 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Sabine Castanier
    • 1
    • 2
  • Marie-Claire Bernet-Rollande
    • 3
  • André Maurin
    • 3
  • Jean-Pierre Perthuisot
    • 4
  1. 1.Faculté des SciencesUniversité d'AngersAngers cedex
  2. 2.Service of Microbiogeology of the Laboratory of BiogeologyUniversity of Nantes
  3. 3.TOTAL Compagnie Française des PétrolesParis la Défense
  4. 4.Laboratory of Biogeology, Faculté des SciencesUniversité de NantesNantes cedex 03

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