Figure 3 | Scientific Reports

Figure 3

From: Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation

Figure 3The alt text for this image may have been generated using AI.

Niche- versus Dispersal-assembly perspectives. (a) In a niche-assembly scenario, communities are closed and balanced, built by a limited number of species at equilibrium (similar assemblages at t + 1 and t + 2). Niche taxonomic composition is controlled by deterministic (i.e., non-random) biotic interactions between taxa and their environment. (b) Dispersal-assembly scenario in which communities are constantly changing (i.e., non-equilibrium; different assemblages between t + 1 and t + 2) owing to random processes such as migrations.

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