Biogeographic refers to the study of the distribution of living organisms. There are several synonyms for the term biogeographic, including biogeographical, bioregional, and biotic. Biogeographical primarily refers to the geographic distribution of plant and animal species. Bioregional refers to the occurrence, distribution, and influences of the environment on the life of organisms within a particular region. Biotic, on the other hand, refers to the living components of an ecosystem and the interactions they have with their environment. These synonyms are often used interchangeably depending on the context and field of study related to the distribution and diversity of life on earth.