The scenario that is best described here is a change in the region's BIODIVERSITY. This measure (biodiversity) indicates the genetic/phenotypic variability found in a region.
Biodiversity refers to the genetic and phenotypic variability of the organisms found in a particular geographic region or the variety of life on the Earth's planet.
Biodiversity can be used to indicate the amount of variation at different levels (i.e., genetic, species, and ecosystem levels).
The different types of animals, plants and microorganisms that live in a forest represent an example of biodiversity.
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