Roland Psenner

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  • D G Georgakopoulos, V Després, J Fröhlich-Nowoisky, R Psenner, P A Ariya, M Pósfai +3 others
  • 2009
The interest in bioaerosols has traditionally been linked to health hazards for humans, animals and plants. However, several components of bioaerosols exhibit physical properties of great significance for cloud processes, such as ice nucleation and cloud condensation. To gain a better understanding of their influence on climate, it is therefore important to(More)
For the past 200 years, the field of aerobiology has explored the abundance, diversity, survival and transport of microorganisms in the atmosphere. Microorganisms have been explored as passive and severely stressed riders of atmospheric transport systems. Recently, an interest in the active roles of these microorganisms has emerged along with proposals that(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)
  • T J Battin, A Wille, R Psenner, A Richter
  • 2004
Glaciers are highly responsive to global warming and important agents of landscape heterogeneity. While it is well established that glacial ablation and snowmelt regulate stream discharge, linkage among streams and streamwa-ter geochemistry, the controls of these factors on stream microbial biofilms remain insufficiently understood. We investigated glacial(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)
For the past 200 years, the field of aerobiology has explored the abundance, diversity , survival and transport of microorganisms in the atmosphere. Microorganisms have been explored as passive and severely stressed riders of atmospheric transport systems. Recently, an interest in the active roles of these microorganisms has 5 emerged along with proposals(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)
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)