1. Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, Anavissos Attikis, Greece
2. International Atomic Energy Agency, Isotope Hydrology Section, Vienna International Centre, Vienna, Austria
3. WasserCluster Lunz Biological Station, Lunz am See, Austria
4. Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN – Cidade Universitária, São Paulo, Brazil
5. Division of Environmental Geosciences (EDGE), Center for Microbiology and Environmental Systems Science (CMESS), University of Vienna, Vienna, Austria