Within the project „PowerStreams“ two master students finished their theses in the end of August under supervision of Thomas Hein and co-supervision of Gabi Weigelhofer. Felix Bauer investigated the production of greenhouse gases in context with the pollution of streams. In the focus of Katharina Leitners thesis was the context between background ammonium concentration, season and ammonium uptake/ retention ability of streams. For both theses nine streams in Lower Austria were sampled in spring and summer 2015.