About the Authors

Anne Sverdrup-Thygeson

anne.sverdrup-thygeson@nmbu.no

Affiliations Norwegian University of Life Sciences, Department of Ecology and Natural Resource Management, Aas, Norway, Norwegian Institute for Nature Research (NINA), Oslo, Norway

Gunnhild Søgaard

Affiliation Norwegian Forest and Landscape Institute (NFLI), Ås, Norway

Graciela M. Rusch

Affiliation Norwegian Institute for Nature Research, Trondheim, Norway

David N. Barton

Affiliation Norwegian Institute for Nature Research (NINA), Oslo, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GS DNB AST GMR. Analyzed the data: AST GS. Contributed reagents/materials/analysis tools: GS. Wrote the paper: AST GS GMR DNB.