A stand of aspen trees dies and decays, leaving a clearing in the forest could be considered a micro-effect. Biodiversity depends on genetic variation.
The term biodiversity makes reference to both genetic and phenotypic variation of populations and species living in a given area.
Biodiversity is fundamental for the homeostasis (internal equilibrium) of a particular ecosystem.
Biodiversity is also fundamental for a population in order to face different environmental conditions.
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