About the Authors

Borgný Katrínardóttir

borgny@ni.is

Affiliations Ecology Department, Icelandic Institute of Natural History, Gardabaer, Iceland, South Iceland Research Centre, University of Iceland, Selfoss/Gunnarsholt, Iceland

José A. Alves

Affiliations South Iceland Research Centre, University of Iceland, Selfoss/Gunnarsholt, Iceland, CESAM, University of Aveiro, Aveiro, Portugal

Hrefna Sigurjónsdóttir

Affiliation Department of Life- and Environmental Sciences, University of Iceland, Reykjavik, Iceland

Páll Hersteinsson

† Deceased.

Affiliation Department of Life- and Environmental Sciences, University of Iceland, Reykjavik, Iceland

Tómas G. Gunnarsson

Affiliation South Iceland Research Centre, University of Iceland, Selfoss/Gunnarsholt, Iceland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BK TGG PH HS JAA. Performed the experiments: BK. Analyzed the data: BK JAA TGG. Contributed reagents/materials/analysis tools: BK TGG PH. Wrote the paper: BK TGG JAA HS PH.