Figure 1
From: Contribution of plant-induced pressurized flow to CH4 emission from a Phragmites fen
Schematic overview of the humidity induced convection inside Phragmites plants. N2 and O2 are transported through stomata of the leaf sheath, following the diffusion gradient. A higher pressure inside the stem is created in living plants (ΔP), which creates an airflow towards the rhizome and goes back to the atmosphere via old or broken stems (red arrows). O2 is transported to the soil and CH4 that diffuses into the rhizome will be transported to the atmosphere. On the places where O2 and CH4 are present together, CH4 oxidation occurs.
