It can be defined as the study of distribution and pattern of variation in numbers and kinds of living organisms.
Biogeography is a synthetic science, related to geography, biology, geology, climatology, and ecology. It is usually not an experimental science, as the spatial and temporal scales makes experiments difficult, but rather a science of observation.
Some fundamentals in biogeography are
- evolution (change in genetic composition of a population)
- extinction (disappearance of a species)
- dispersal (movement of populations away from their point of origin)