An approach to conservation that emphasizes smallness itself as an ultimate cause of a population's extinction through processes such as the extinction vortex.

A downward population spiral in which inbreeding and genetic drift combine to cause a small population to shrink and, unless the spiral is reversed, become extinct.

An approach to conservation that focuses on threatened and endangered populations that show a downward trend, even if the population is above minimum viable population

A relatively small area with numerous endemic species and a large number of endangered and threatened species.

Development that meets the needs of people today without limiting the ability of future generations to meet their needs.