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On the other hand, the study of the ecological complexity has been related with stability. This way, complexity characterization has been supported in variables such as species richness (number of species), connectance (fraction of the possible interspecific interactions), interaction strength (effect of one species’ density on the growth rate of another specie) and evenness (abundance variance). Meanwhile, stability has been related with resilience (velocity to return to the equilibrium), resistance (variable’ grade of change) and variability (population density variance) (Pimm, 1984). The hypothesis about the relation of functional complexity and stability that defines a positively correlation between functional complexity and stability (Van Voris et al., 1980), were discussing for a long time with a variety of results and answers.