1. Department of Botany; University of Otago; P.O. Box 56 Dunedin 9054 New Zealand
2. The Scottish Association for Marine Science; Scottish Marine Institute; Oban Argyll PA37 1QA Scotland
3. Irish Seaweed Research Group; Ryan Institute for Environmental, Marine and Energy Research; National University of Ireland; Galway (NUIG) University Road Galway Ireland
4. Institute for Marine and Antarctic Studies; University of Tasmania; Hobart Tasmania 7001 Australia
5. Bioforsk Norwegian Institute for Agricultural and Environmental Research; Kudalsveien 6 8049 Bodø Norway