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          Institute: MPI für Evolutionsbiologie     Collection: Ecophysiology     Display Documents



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ID: 478129.0, MPI für Evolutionsbiologie / Ecophysiology
Upward phosphorus transport by Daphnia diel vertical migration
Authors:Haupt, Florian; Stockenreiter, Maria; Reichwaldt, Elke S.; Baumgartner, Michaela; Lampert, Winfried; Boersma, Maarten; Stibor, Herwig
Language:English
Date of Publication (YYYY-MM-DD):2010-03
Title of Journal:Limnology and Oceanography
Journal Abbrev.:Limnol. Oceanogr.
Volume:55
Issue / Number:2
Start Page:529
End Page:534
Review Status:not specified
Audience:Not Specified
Abstract / Description:In many lakes, zooplankton show a distinct diel vertical migration (DVM) behavior, especially during periods of stratification. Excretion products of these zooplankton could potentially cause an upward nutrient transport and consequent nutrient enrichment for phytoplankton in the epilimnion. We quantified the upward transport of phosphorus by the cladoceran Daphnia DVM experimentally by adding a radioactive tracer (33P) to the hypolimnion of large indoor mesocosms and measuring tracer accumulation in the epilimnion over time. During the daytime, when all Daphnia were found in the hypolimnion, no phosphorus transport from the hypolimnion into the epilimnion took place. As soon as the Daphnia started their upward migration, around dusk, we observed a continuous increase in phosphorus concentration in the epilimnion. The amount of phosphorus transported was in a biologically meaningful range. Our results strongly suggest that Daphnia vertical migration presents a continuous nutrient supply for the epilimnion.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Ökophysiologie
External Affiliations:Univ Munich, Dept Biol 2, Planegg Martinsried, Germany;
Univ Western Australia, Sch Environm Syst Engn, Crawley, Australia; Biol Anstalt Helgoland, Alfred Wegener Inst Polar & Meeresforsch, Helgoland, Germany; European Inst Marine Studies, Plouzane, Franc
Identifiers:ISSN:0024-3590 [ID-No:1]
LOCALID:2758/S 39090 [Listen-Nummer/S-Nummer]
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