Spatial aspect: diﬀusion as a paradigm
The analysis of the previous few chapters has largely ignored the spatial aspects of the population dynamics. The underlying assumptions are twofold. First, the results of the nonspatial analysis apply to the case of spatially homogeneous, “well-mixed” populations, which usually implies that the corresponding habitat is suﬃciently small. Alternatively, the impact of spatial dimension(s) can possibly be ignored in a somewhat more exotic case when the individuals of a given species remain ﬁxed in space at any time and in any generation.