Schrutka, S. University of Vienna Dept. of Limnology, susanne@zoo.univie.ac.at
Holarek, C. University of Vienna Dept. of Limnology, holarek@zoo.univie.ac.at
Heiler, G. University of Vienna Dept. of Limnology,
Hein, T. University of Vienna Dept. of Limnology, thomas.hein@univie.ac.at
Queric, N. V. University of Vienna Dept. of Marine Biology, a8902172@unet.univie.ac.at
Schiemer, F. University of Vienna Dept. of Limnology, schiemer@zoo.univie.ac.at

 
HYDROLOGICAL CONNECTIVITY: MAIN FACTOR FOR METAZOOPLANKTON GRAZING IN FLOODPLAINS OF THE RIVER DANUBE, AUSTRIA
 
Floodplains are highly productive systems characterised by significant fluxes of energy and material. A pilot study of the plankton community, including bacterio-, phyto- and zooplankton, was conducted in 1997 at two different floodplain sections characterised by either low (Lobau) or high (Regelsbrunn) connectivity to the River Danube. In Regelsbrunn water level fluctuations of the river strongly affected the plankton assemblage. Based on these data we estimated metazooplankton community grazing and grazing of different categories (cladocerans, copepods and rotifers) applying clearance and filtration rates from the literature. The material flux into zooplankton (in terms of carbon) in Lobau was relatively constant during the study period. In Regelsbrunn the carbon flow fluctuated strongly and collapsed at flood pulses. However, in periods of low water some zooplankton species reached very high abundances, thus stimulating the material transfer to higher trophic levels considerably.
 
Day: Tuesday, Feb. 2
Time:
Location: Sweeney Center
 
Code: SS47TU0665S