1. Department of Zoology, University of Delhi, Delhi 110007, India
2. Department of Environmental Microbiology, Swiss Federal Institute of Aquatic Research and Technology (Eawag), CH 8600 Dübendorf, Switzerland
3. Agaroscope FAW Wädenswil, Swiss Federal Research Station, CH 8820 Wädenswil, Switzerland
4. EPFL, ENAC-ISTE, Laboratory of Environmental Biotechnology, CH 1015 Lausanne, Switzerland