N2-Fixing Cyanobacteria: Why They Do Not Become Dominant in Dutch, Hypertrophic Lakes

  • Wanda Zevenboom
  • Luuc R. Mur
Part of the Developments in Hydrobiology book series (DIHY, volume 2)

Abstract

Species shifts and succession phenomena in lakes of increasing trophic state were considered in detail, using the basic information on the growth kinetics of the species involved. Successively we dealt with the succession from green algae to cyanobacteria in eutrophic lakes and the competitive interactions between N2-fixing and non-N2-fixing cyanobacteria in eutrophic-hypertrophic lakes. The competing species could be placed along an irradiance gradient; their position being defined by their light-energy requirements. Further, when a N2-fixing organism was involved, the competitive interaction could be defined under different sets of irradiance values and nitrate concentrations. The growth kinetic data, obtained under laboratory conditions, provided the basic information to explain why hypertrophic lakes are less favourable to N2-fixers, even when a N-limitation prevails. The trophic state of the lake is of major importance and is decisive with regard to which species will dominate.

Keywords

Biomass Combustion Phosphorus Agar Carbohydrate 

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Copyright information

© Dr. W. Junk b.v. Publishers-The Hague, The Netherlands 1980

Authors and Affiliations

  • Wanda Zevenboom
    • 1
  • Luuc R. Mur
    • 1
  1. 1.Laboratorium voor MicrobiologieUniversiteit van AmsterdamAmsterdamThe Netherlands

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