Sky Island
Sky islands are mountains that are isolated by surrounding lowlands of a dramatically different environment, a situation which, in combination with the altitudinal zonation of ecosystems, has significant implications for natural habitats. Endemism, vertical migration, and relict populations are some of the natural phenomena to be found on sky islands.
The complex dynamics of species richness on sky islands draws attention from the discipline of biogeography, and likewise the biodiversity is of concern to conservation biology. One of the key elements of a sky island is separation by sheer physical distance from the other mountain ranges, resulting in a habitat island, such as a forest surrounded by desert.
Some sky islands serve as refugia for boreal species stranded by warming climates since the last ice age. In other cases, localized populations of plants and animals tend towards speciation, the same process that happens on oceanic islands such as the Galápagos Islands.
Read more about Sky Island: Origin of The Term, Characteristics
Famous quotes containing the words sky and/or island:
“The stars are scattered all over the sky like shimmering tears, there must be great pain in the eye from which they trickled.”
—Georg Büchner (1813–1837)
“Know that, on the right hand of the Indies, there is an island called California, very near to the Terrestrial Paradise, which was peopled with black women.... Their arms were all of gold.”
—For the State of California, U.S. public relief program (1935-1943)