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The habitat patches refer to small areas of population with high external force reaching the inner partsand small individuals having high exchanges with the external medium.

The larger patches of habitat are connected to one another to allow organisms to move from one area to the next, such as stepping stones. On the other hand, isolated patches have less movement of organisms.

Local populations can be found in discrete patches that can vary in size and quality. Such patches can be isolated from other patches in terms of factors influencing the movement of individuals.

When habitat fragmentation increases, the population density decreases.Thus, high patches may arise from habitat fragmentation, allowing organisms within the patches to confront habitat-to-matrix borders, which results in a high rate of emigration.

When a population is extinct, the local population occupying the patch may be recolonized by immigrants moving from other populations. Thus, emigration and immigration offsetting each other will expand the population when the birth rate exceeds the death rate and decline when the death rate exceeds the birth rate.