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 61037
Title Effects of artificial ultraviolet-B radiation on experimental aquatic microcosms
Author(s) Lange, H.J. de; Verschoor, A.M.; Gylstra, R.; Cuppen, J.M.; Donk, E. van
Source Freshwater Biology 42 (1999). - ISSN 0046-5070 - p. 545 - 560.
DOI https://doi.org/10.1046/j.1365-2427.1999.00478.x
Department(s) Aquatic Ecology and Water Quality Management
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract 1. The effects of prolonged ultraviolet-B (UVB) radiation on freshwater communities were studied in indoor microcosms (600 L) with artificial light sources, simulating a clear, shallow, mesotrophic aquatic ecosystem. A range of six intensities (in duplicate) of UVB radiation, ranging from 0 (control) to 9.56 kJ m2 day1 at the water surface, was applied for 8 weeks. The UVB radiation levels, attenuation, shading and scattering were comparable to those in Dutch shallow freshwater systems. Physical, chemical and biological variables were monitored weekly. 2. The UVB treatment did not affect the abundance, species composition or biovolume of the phytoplankton or zooplankton communities, nor did it affect the periphyton or the macroinvertebrate community. A few species showed a significant response on some of the sampling dates, but there was no negative UVB effect at the community level. Overall, the ecosystems in the microcosms were not affected by the UVB treatment. 3. In a bio-assay, a laboratory clone of Daphnia pulex, not subjected to UVB radiation, was fed with seston from the microcosms. Daphnia pulex feeding on seston from the control microcosms grew faster, had better survival and better reproduction than D. pulex feeding on seston from the UVB treated microcosms. The phytoplankton-zooplankton interaction may have been influenced by the UVB treatment. 4. The dissolved oxygen content (DOC) concentrations in the microcosms were around 5 mg L1. The DOC levels in Dutch systems rarely fall below 10 mg L1. This might provide sufficient protection against the detrimental effects of increased UVB radiation.
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