1. School of Environmental Science and Management, Southern Cross University, P.O. Box 157, Lismore, New South Wales 2480, Australia
2. Industry & Investment NSW, 1243 Bruxner Highway, Wollongbar NSW 2477, Australia
3. Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, P.O. Box 158, 2009 Neuchâtel, Switzerland