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  Effects of UV-B irradiated algae on zooplankton grazing

De Lange, H. J., & Lürling, M. (2003). Effects of UV-B irradiated algae on zooplankton grazing. Recent Developments in Fundamental and Applied Plankton Research, 133-144.

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deLange_2003.pdf (Verlagsversion), 612KB
 
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 Urheber:
De Lange, Hendrika J., Autor
Lürling, Miquel1, Autor           
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Schlagwörter: ultraviolet-B radiation; grazing; phytoplankton; zooplankton; trophic interactions
 Zusammenfassung: We tested the effects of UV-B stressed algae on grazing rates of zooplankton. Four algal species ( Chlamydomonas reinhardtii, Cryptomonas sp., Scenedesmus obliquus and Microcystis aeruginosa) were used as food and fed to three zooplankton species ( Daphnia galeata, Bosmina longirostris and Brachionus calyciflorus), representing different taxonomic groups. The phytoplankton species were cultured under PAR conditions, and under PAR supplemented with UV-B radiation at two intensities (0.3 W m(-2) and 0.7 W m(-2), 6 hours per day). Ingestion and incorporation experiments were performed at two food levels (0.1 and 1.0 mg C l(-1)) using radiotracer techniques. The effect of food concentration on ingestion and incorporation rate was significant for all three zooplankton species, but the effect of UV-B radiation was more complex. The reactions of the zooplankton species to UV-B stressed algae were different. UV-B stressed algae did not affect Daphnia grazing rates. For Bosmina the rates increased when feeding on UV-B stressed Microcystis and decreased when feeding on UV-B stressed Chlamydomonas, compared with non-stressed algae. Brachionus grazing rates were increased when feeding on UV-B stressed Cryptomonas and UV-B stressed Scenedesmus, and decreased when feeding on UV-B stressed Microcystis, compared with non- stressed algae. These results suggest that on a short time scale UV-B radiation may result in increased grazing rates of zooplankton, but also in decreased grazing rates. Long term effects of UV-B radiation on phytoplankton and zooplankton communities are therefore difficult to predict.

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Sprache(n): eng - English
 Datum: 2003-01
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 35362
ISI: 000183771600012
Anderer: 2206/S 37940
 Art des Abschluß: -

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Quelle 1

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Titel: Recent Developments in Fundamental and Applied Plankton Research
Genre der Quelle: Heft
 Urheber:
van Donk, E., Herausgeber
Boersma, M.1, Herausgeber           
Spaak, P.1, Herausgeber           
Affiliations:
1 Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547            
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Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 133 - 144 Identifikator: -

Quelle 2

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Titel: Hydrobiologia
  Alternativer Titel : Hydrobiologia
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 491 (1-3) Artikelnummer: - Start- / Endseite: - Identifikator: ISSN: 0018-8158