Fig. 4From: Elevated atmospheric CO2 and humidity delay leaf fall in Betula pendula, but not in Alnus glutinosa or Populus tremula × tremuloides Percentage leaf mass remaining in the canopy of birch (Betula pendula) and alder (Alnus glutinosa) grown at ambient or elevated atmospheric CO2 (FACE). Data points show mean ± SE. n = 4Back to article page