Authors
Trond Simensen
a) Geo-ecological research group, Department of Research and Collections, Natural History Museum, University of Oslo, b) Norwegian Institute for Nature Research—NINA Høgskoleringen 9, Oslo
Rune Halvorsen
Geo-ecological research group, Department of Research and Collections, Natural History Museum, University of Oslo, Oslo, Norway
Lars Erikstad
a) Norwegian Institute for Nature Research—NINA, Sognsveien 68, b) Geo-ecological research group, Department of Research and Collections, Natural History Museum, University of Oslo, Oslo