The study of population dynamics involves investigating changes in features of populations such as numbers of individuals, individual weights and ages, and the biotic and abiotic conditions influencing those changes. The coexistence of the populations of different species simply refers to the persistence of two or more species' populations over time in a given area. Fluctuations in the dynamics of species' populations determine where, how, and when they will interact with individuals of the same species and individuals of other species. Those population interactions, and the ability to avoid interactions, are important properties determining the coexistence of large numbers of species. This article demonstrates the critical link between the dynamics of species' populations driving interactions among organisms and mechanisms promoting coexistence among species.
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