If anyone can help it would be greatly appreciated Why is the distinction between crude density and ecological density necessary?

Crude density includes all the land within the organism's range whereas Ecological density includes only that portion of land that can actually be colonized by the species.This variation in density is important to both the species in question and its predators.

Explanation:

This called crude density. ... Density measure in terms of the amount of area available as living space is ecological density. Crude density includes all the land within the organism's range whereas ecological density includes only that portion of land that can actually be colonized by the species.

Explanation:

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