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Fig. 1.Environmental data from the moist acidic tundra experimental plotsat the Arctic Long-term Ecological Research field site at Toolik Lake, Alaska,including (a) growing season maximum and minimum air temperature,(b) daily total PAR, (c) relative humidit
Table 1.Results from three-way repeated-measures ANOVA analysing the carbon (% C) and nitrogen (%N) concentrations and their ratio (C : N)of dry leaf material and specific leaf area (SLA) in Betula nana and Eriophorum vaginatum*, 0.05; **, 0.01; ***, 0.001; S, species; R, round; W, warming round; df, degrees of freedom
Table 2.Results from three-way repeated-measures ANOVA analysing foliar gas exchange variables, including light-saturating photosynthesis (the ratio of photosynthetic carbon assimilation to respiratory carbon release (dark respiration (and the electron transport rate (Asat),Rdark) and respiration in the light (Rlight) expressed on an area, mass and nitrogen basis; the ratio of Rlight to Rdark (Rlight : RDark);Rlight : Agross); and the maximum carboxylation rate of Rubisco (Vcmax)J), both measured at ambient leaf temperature and corrected for a constant temperature of 258C in Betula nana andEriophorum vaginatum
Fig. 2.(warmed (a, b)Saturating photosynthesis (Asat; measured at PAR = 1500 mmol m–2 s–1 and 400 parts per million (ppm)CO2), (c, d) foliar dark respiration (Rdark; measured at PAR = 0 mmol m–2 s–1 and 400 ppm CO2) and (e, f) respiration inthe light (Rlig
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