Roland Psenner

Learn More
A proposed sequence of major events for the self-assembly of life on Earth is examined. This sequence starts with a construction kit of elements and simple compounds from which a primitive membrane and then a nanocell with a minimal genome is self-assembled. The genome and cell increase in size and complexity and become capable of cell division, similar to(More)
We investigated long-term succession of sedimentary cladoceran assemblages in two morphologically divergent mountain lakes by utilizing sediment traps and previously available sediment data. We aimed to detect lake-specific changes in pelagic communities potentially attributable to climate warming under the presumption that lakes and biotic communities may(More)
High Arctic lakes are among the most sensitive ecosystems and climate change strongly affects their physical properties, especially water temperature, and mixing processes. To study the effect of recent climate change on such a lake in the Arctic environment, we measured water chemistry and temperature from 2005 to 2010 in Kongressvatn, a crenogenic(More)
Piburger See, a dimictic mountain lake in Austria, experienced moderate cultural eutrophication in the 1950s. Lake restoration led to a re-oligotrophication in the 1990s with a decrease in seasonal phytoplankton biovolume until the late 1990s, but a reversed trend from the early 2000s onwards. We hypothesize that recent changes in phytoplankton biomass and(More)
The bacterial and archaeal diversity of deep groundwater systems was investigated based on 16S rRNA-SSCP (single strand conformation polymorphism) fingerprints. The study site included five boreholes along the projected Brenner Base Tunnel in the central Alps of Tyrol, Austria. To obtain representative samples, packer-sealed fractures were sampled at(More)
Abstact: Persistent Organic Pollutants (POPs) have been restricted and prohibited at national level for several decades now and since the 21st century at international level under the Stockholm Convention and the Convention of Long-Range Transboundary Air Pollution (LRTAP). A high mountain lake sediment core was sampled in the Alps (Gossenköllesee) in(More)
Despite the fact that rock glaciers are one of the most common geomorphological expressions of mountain permafrost, the impacts of their solute fluxes on lakes still remain largely obscure. We examined water and sediment chemistry, and biota of two neighboring water bodies with and without a rock glacier in their catchments in the European Alps.(More)