My notebooks are often filled with doodled diagrams similar to this piece showing the movement of carbon through ecosystems and how it may change seasonally or under disturbance. Plant communities in alpine snowbeds often contain Sphagnum mosses and other bryophytes, and vascular plants such as Nardus stricta and Narthecium ossifragum.
Moving top down, the first two arrows represent carbon coming into the system via fixation by plants, and the release of carbon due to plant and microbial respiration. The two spiralled arrows represent the breakdown of carbon compounds by microbes. The horizontal arrow represents the movement of carbon downslope as leachate. The final arrow pointing down represents the formation of large stores of soil carbon.