Effects of climate treatments and soil types on soil respiration, foliage biomass and coarse root biomass.

Air-warming (AW) and drought (D) treatment effects on soil respiration on 20.8.09 at the maximum of a drought period (µmol CO2 m−2 s−1), with the foliage biomass and coarse root biomass in 2007 (kg m−2, means ± SE) in the two soils (“A” acidic, “B” calcareous). Different letters indicate significant differences between the respective treatments in the same soil. DW indicates dry weight. An asterisk (*) indicates a significant difference between acidic and calcareous soil for the respective treatment.