About the Authors

Ingunn M. Tombre

ingunn.tombre@nina.no

Affiliation Norwegian Institute for Nature Research, Arctic Ecology Department, The Fram Centre, Tromsø, Norway

Einar Eythórsson

Affiliation Norwegian Institute for Cultural Heritage Research, The Fram Centre, Tromsø, Norway

Jesper Madsen

Affiliation Aarhus University, Department of Bioscience, Arctic Research Centre, Aarhus, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: IMT EE JM. Performed the experiments: IMT EE JM. Analyzed the data: IMT EE JM. Contributed reagents/materials/analysis tools: IMT EE JM. Wrote the paper: IMT EE JM.