Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 327598
Title A simple method for analysing the effects of algae on the growth of Lemna and preventing algal growth in duckweed bioassays
Author(s) Szabo, S.; Roijackers, R.M.M.; Scheffer, M.
Source Archiv für Hydrobiologie 157 (2003)4. - ISSN 0003-9136 - p. 567 - 575.
DOI https://doi.org/10.1127/0003-9136/2003/0157-0567
Department(s) Aquatic Ecology and Water Quality Management
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) schadelijke waterplanten - toxicologie - biotesten - ecotoxicologie - aquatic weeds - toxicology - bioassays - ecotoxicology - fresh-water macrophytes - common duckweed - waste-water - toxicity - ph
Categories Environmental Toxicology, Ecotoxicology
Abstract A simple novel method for indoor culture experiments with small floating water plants, such as Lemnaceae, is described. Experiments demonstrate that the method allows for longer lasting culture experiments with Lemna, avoiding algal growth and self-shading of fronds by overcrowding. This is achieved by enclosing the Lemna fronds in tubes, which are replaced during growth by tubes of increasing diameter. The RGR of Lemna reached optimal values (RGR > 0.3 day-1) when not hampered by algal growth. In competition experiments with algae growing outside the tubes and Lemna inside the tubes, the growth of the fronds decreased dramatically; chlorophyll content of the fronds was 91-97% less and RGR 29-55 % less. This method allows for multifactorial experiments, handling up to 100 experimental units per researcher. This paves the road to competition experiments among and between water plants for light, nutrients and space
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