Population distribution and abundance are interrelated aspects of the ecology of species and are fundamental parameters needed for their conservation. Distribution is given by the occurrence and spatial arrangement of individuals of a species within a geographic area, and it is primarily determined by the presence or absence of suitable habitat conditions. Abundance refers to the numbers of individuals of a species occurring within a geographic area at a given point in time. Population distribution and abundance can be examined over various spatial (e.g. local, regional, global) and temporal scales (e.g. daily, seasonal, annual), and often fluctuate over time and space. A variety of methods are used to estimate and assess population distribution and abundance, and results can vary depending on the method used. The information resources on King Rail in this web page reflect these various approaches.

SOURCE: Ricklefs, R.E. 1990. Ecology (3rd Edition). W.H. Freeman and Company, New York.