Henrik Hedenås,^* Håkan Olsson,^** Christer Jonasson,^*** Johan Bergstedt,^**** Ulrika Dahlberg,^***** Terry V. Callaghan<sup>******


*</sup>Henrik Hedenås () has a PhD in Ecology from the department of Ecology and Environmental Science (EMG), Umeå University. He has worked at different positions at EMG, and is currently a researcher at Abisko Scientific Research Station and temporary Forest Habitat Advisor at Species Information Centre, Swedish University of Agricultural Science. Address: Abisko Scientific Research Station, 981 07 Abisko, Sweden e-mail: henrik.hedenas@slu.se; henrik.hedenas@gmail.com
^**Håkan Olsson is since 1994 professor in forest remote sensing at the Swedish university of Agricultural Sciences. In 1997 he established the permanent field plots at Abisko as part of the Climate Impact Research Centre (CIRC) research program at the Abisko Research Station. He then initiated the re-survey of the plots in 2010. Address: Forest Resource Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden. e-mail: hakan.olsson@slu.se
^***Christer Jonasson has a PhD in Physical Geography from Uppsala University and is Associate professor at Stockholm University. He is Station Manager for the Abisko Scientific Research Station. Address: Abisko Scientific Research Station, 981 07 Abisko, Sweden e-mail: christer.jonasson@ans.polar.se
^****Johan Bergstedt has a PhD in Ecology from the department of IFM—Physics, Chemistry and Biology, Linköping University. He has worked as teacher and study counselor at the IFM. He has also a worked with the Swedish National Forest Inventory (NFI, performed by the department of Forest Resource Management at the Swedish University of Agricultural Sciences) for a number of years and is currently working for the NFI as well as IFM at Linköping University. Address: IFM-Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden. e-mail: johan.bergstedt@liu.se; johan.bergstedt@gmail.com
^*****Ulrika Dahlberg has licentiate exam from the department of Forest Resource Management, Swedish university of Agricultural sciences. She is currently working with geographical information products at Lantmäteriet. Address: Lantmäteriet, 801 82 Gävle, Sweden. e-mail: ulrika.dahlberg@lm.se
^******Terry V. Callaghan has a PhD from the University of Birmingham, UK, honorary PhDs from the Universities of Lund, Sweden, and Oulu, Finland, and a DSc from the University of Manchester, UK. He is a Royal Swedish Academy of Sciences' Distinguished Research Professor and Member and also Professor of Arctic Ecology at the University of Sheffield, UK. Address: Royal Swedish Academy of Sciences, Box 50005, 104 05 Stockholm, Sweden. Address: Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK. e-mail: terry_callaghan@btinternet.com