A wide range of ecological interactions separately or in concert, facilitate coexistence within populations and between species (for a summary see Table 1). Coexistence mechanisms can explain both the enormous species richness in some habitats and the dominance of a few taxa in others. Close coexistence of individuals within a species, or very similar species, is possible through a combination of biotic interactions and physical disturbances which may prevent 'equilibrium' conditions ever being reached.
See also: Adaptation; Death; Dispersal-Migration; Environmental Stress and Evolutionary Change; Fecundity; Growth Models; Metapopulation Models; Resilience; Resistance and Buffer Capacity.
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