Institution: | Icelandic Institute of Natural History, PO Box 5320, IS-125 Reykjavík, Iceland;;The Wildfowl &Wetlands Trust, Slimbridge, Gloucestershire GL2 7BT, UK;;14 St Vincent Road, Tain, Ross-shire IV19 1JR, UK;and;National Environmental Research Institute, Department of Coastal Zone Ecology, Kalø, Grenåvej 12, DK-8410 Rønde, Denmark |