Occupancy-abundance relationship

The occupancy-abundance relationship is a pattern in ecology describing how a species' local population density relates to the size of the geographic range it occupies. The relationship is predominantly positive: species that are more widespread also tend to be more locally abundant, with observed changes in a species' range associated with disproportionately larger changes in its abundance. Although the pattern has been documented across many species and carries real implications for conservation, the biological mechanisms that produce it remain unclear, and it holds both within a single species' population over time and across many species at once, making it one of the most consistent patterns in macroecology. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/