Both about spatial structure enabling persistence. Facilitation-competition balance creates threshold dynamics (Allee effect) vs heterogeneity threshold for coexistence. Related mechanisms but different flavors.
Plants facilitate neighboring growth through local resource modification. Facilitation competes with resource competition. When precipitation is intermittent, facilitation-competition balance creates spatial vegetation patterns. Below threshold density, vegetation collapses due to weakened facilitation (spatial Allee effect).
view paper→Spatial structure and dispersal networks jointly determine species persistence. Heterogeneous habitats support stable coexistence only above a critical heterogeneity threshold. Homogeneous environments allow coexistence only in a fine-tuned marginal state, creating instability. Network topology encodes dispersal effectiveness through an effective kernel.
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