Biodiversity or biological diversity is one of the key terms in conservation, encompassing the richness of life and the diverse patterns it forms. The Convention on Biological Diversity (CBD) defines biological diversity as "the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems". Landscape diversity means the variability of a group of geological formations and of vegetation types with different space use. Therefore, a group of different ecosystems can be referred to as a landscape. Genetic diversity, the level of biodiversity, refers to the total number of genetic characteristics in the genetic makeup of a species. It serves as a way for populations to adapt to changing environments.
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