Plant material
Peat mesocosms from hummocks dominated by Sphagnum fuscum(Schimp.) Klinggr. and lawns dominated by Sphagnum majus (Russ.)
Jens. were collected in May and August of 2016, and July 2017, from the
same site located at the northern end of the Degerö-Stormyr peatland.
Degerö-Stormyr is a nutrient-poor minerogenic mire in northern Sweden
(64˚11’N, 19˚33’E, 270 m asl) near Vindeln municipality that is included
in the ICOS (Integrated Carbon Observation System; Franz et al .,
2018) Swedish national and European research infrastructure. Mesocosms
of 20 x 20 x 25 cm were collected using a sharp knife and transferred to
11 L square plastic containers for subsequent incubation in
climate-controlled growth chambers. Vascular plants (Andromeda
polifolia , Rubus chamaemorus , Vaccinium oxycoccus ,Drosera rotundifolia , Empetrum nigrum , Scheuchzeria
palustris, Eriophorum vaginatum and Carex spp. ) andPolytrichum spp. mosses were removed before incubation.