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Salvarina, I., Limnological Insitute, University of Konstanz, Konstanz, Germany, Ioanna.Salvarina@uni-konstanz.de
Yohannes, E., Limnological Institute, University of Konstanz, Konstanz, Germany, Elizabeth.Yohannes@uni-konstanz.de
Gravier, D., Limnological Institute, University of Konstanz, Konstanz, Germany, dorian.gravier@gmail.com
Rothhaupt, K. O., Limnological Institute, University of Konstanz, Konstanz, Germany, Karl.Rothhaupt@uni-konstanz.de

AQUATIC SUBSIDIES (EMERGING INSECTS) TO TERRESTRIAL CONSUMERS (BATS)

Reciprocal subsidies may have significant effects to both the recipient and the donor habitat and their food webs. Emerging aquatic insects can be critical for some bat populations, especially when other food resources are scarce. The aim of this study was to investigate the importance of lakes from the terrestrial perspective by quantifying the contribution of aquatic subsidies to terrestrial consumers. The abundances of emerging insects- from three lakes of different trophic status in the area of Konstanz, Germany, are correlated and discussed with the feeding activity of bat species near the lakes as it was recorded using a passive ultrasound recorder. The dependence of some bat species on aquatic insects as a food source was also proved using stable isotope analyses of carbon and nitrogen on fecal samples of the species found in the study areas. As we have shown in a previous study, stable isotopes in bat feces can be used as tracers of aquatic sources in their diet and provide general information about the significance of the freshwater ecosystems for bat species.

https://depot.uni-konstanz.de/cgi-bin/exchange.pl?g=bdppqbdbq6

Oral presentation

Session #:SS35
Date: 7/13/2012
Time: 09:30