Discussion
.................. of species is the number of individuals or biomass per unit area of total area.
Answer: D
This is crude density.
Crude density is the number (or biomass) of individuals per unit of the total area. Ecological (specific) density is the number per unit of the area actually available as habitat, which is usually higher.
Ecological mortality and natality are death and birth rates under real conditions, not densities. Specific density refers to the habitable space, not the total area.
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