1. Fossil Fuels and Environmental Geochemistry Postgraduate Institute (NRG) and Centre for Molecular Ecology, Drummond Building, University of Newcastle upon Tyne, Newcastle uponTyneNE1 7RU, UK
2. Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA16802, USA
3. Biotechnology Research Centre, La Trobe University, Bendigo, Victoria 3550, Australia
4. Advanced Wastewater Management Centre, Department of Microbiology and Parasitology, University of Queensland, Brisbane 4072, Queensland, Australia
5. Institute of Freshwater Ecology, Windermere Laboratories, Far Sawrey, Ambleside, Cumbria LA22 OLP, UK
6. Freshwater Biological Association, Windermere Laboratories, Far Sawrey, Ambleside, Cumbria LA22 OLP, UK
7. Nishihara Environmental Sanitation Research Corp. Ltd, Minato-Ku, Tokyo 108, Japan