The term is a modern English compound, primarily used in ecology and biology. The first element, "species," originates from Latin specere ("to look at, behold"), evolving through species to denote a particular sort or kind, especially of plants or animals. The second element, "rich," has Germanic origins, from Proto-Germanic rīkijaz ("powerful, noble"), which extended to mean possessing great resources or abundance. Combined in the mid-20th century, the compound "species-rich" logically constructs its meaning from its parts: "abundant in kinds," directly describing an environment with high biodiversity. This formation follows a common English pattern of noun+adjective compounding to create a descriptive technical term.

Structure: species (kind, type) + rich (abundant) - species: From Latin 'species' meaning "appearance, form, kind". In this compound, it functions as the head noun denoting the biological classification. - rich: From Old English 'rīċe' meaning "powerful, wealthy, abundant". In this compound, it functions as an adjective-forming element meaning "abounding in".