Fig. 4
From: General principles in the community ecology of ectomycorrhizal fungi
A graphical representation of the hierarchical community structure model. Each combination of shape and color represents a unique taxon. Variation in shape represents variation in host compatibility. Taxa forming the realized community must tolerate filtering of traits by host species, filtering of traits by the abiotic environment, and the effects of some level of competitive interaction. Competitive hierarchies due to trait variation in a homogeneous community may ultimately lead to exclusion, but competition may be ameliorated to varying degrees by disturbance or habitat partitioning, leading to varying degrees of coexistence. Habitat partitioning depends on trait variation in a heterogeneous habitat