1. Polar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
2. Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany
3. Institute of Natural Sciences, North-Eastern Federal University of Yakutsk, Yakutsk, Russia
4. Institute for Biological Problems of the Cryolithozone, Russian Academy of Sciences, Siberian branch, Yakutsk, Russia
5. Institute of Environmental Sciences and Geography, University of Potsdam, Potsdam, Germany