Algal communities associated with aquatic macrophytes in some artificial ponds in Nyando District, Kenya

  • Balthazar Mpawenayo Département de Biologie,Université du Burundi, BP 2700 Bujumbura, Burundi
  • Christine Cocquyt Department of Biology, Section Protistology and Aquatic Ecology, Ghent University, Krijgslaan 281-S8, B-9000 Gent, Belgium
Keywords: algae, diatoms, ecological groups, physico-chemical characteristics, wetlands

Abstract

This study describes the algal communities of six ponds colonised by aquatic macrophytes in Nyanza Province, Kenya. Plankton samples were collected from the water column and epiphytic samples from macrophytes such as Azolla, Pistia, Nymphaea, Ipomoea and Ludwigia. Pond pH, temperature, conductivity, concentration and dissolved oxygen saturation were also measured. The algal flora of the ponds comprised 139 species and varieties from 58 genera. Diatoms and green algae, mostly desmids, were the dominant groups. About 50 of the algal taxa were indicators of low mineral content of the water. Four distinct diatom communities were identified, using Canonical Correspondence Analysis. The constant dominant taxa were Achnanthes sp., Gomphonema gracile and Pinnularia gibba. The analysis showed that all samples from the same pond were grouped together, irrespective of the aquatic plants sampled.

African Journal of Aquatic Science 2007, 32(1): 201–208
Published
2007-08-28
Section
Articles

Journal Identifiers


eISSN: 1727-9364
print ISSN: 1608-5914