Fig. 2From: 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 hybrid aspen (Populus tremula × tremuloides) grown at ambient humidity or increased humidity (FAHM). Data points show mean ± SE. n = 3Back to article page