Original paper

The strength of limiting factors for duckweed during algal competition

Szabó, Sándor Roijackers; Scheffer, Marten; Borics, Gábor

Archiv für Hydrobiologie Volume 164 Number 1 (2005), p. 127 - 140

published: Sep 30, 2005

DOI: 10.1127/0003-9136/2005/0164-0127

BibTeX file

ArtNo. ESP141016471008, Price: 29.00 €

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Duckweed (Lemna gibba) growth was found to be strongly reduced by unicellular green algae (Scenedesmus conspicua, Chlorella sp., Chlamydomonas sp.) in indoor experiments. These algae reduced N, P, Fe and Mn concentrations of the medium drastically, moreover they increased the pH beyond 10. Subsequent additions of nutrients and pH neutralisation removed the growth inhibition of duckweed. This growth inhibition is, therefore, concluded to be due to pH increase and N, P and trace element (Fe, Mn) removal. Of the five factors significantly inhibiting duckweed growth, depletion of N was strongest, increase in pH was second, followed by reduction of P > Fe > Mn.


lemna alga competition phnitrogen phosphorusiron