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Paleoendemism
Paleoendemism along with neoendemism is a possible subcategory of endemism. Paleoendemism refers to species that were formerly widespread but are now restricted to a smaller area. Neoendemism refers to species that have recently arisen, such as through divergence and reproductive isolation or through hybridization and polyploidy in plants. Etymology The first part of the word, paleo, comes from the Greek language, Greek word ''palaiós, meaning "ancient".'' The second part of the word, ''endemism'' is from New Latin ''endēmicus'', from Greek ενδήμος, ''endēmos'', "native". ''Endēmos'' is formed of ''en'' meaning "in", and ''dēmos'' meaning "the people". Causes Changes in climate are thought to be the driving force in creating paleoendemic species, generally due to habitat loss. Regions where the climate has remained relatively stable form Refugium (population biology), refugia which are more likely to be endemic hotspots today. This applies to both neoendemism and pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoendemism
Neoendemism is one of two sub-categories of endemism, the ecological state of a species being unique to a defined geographic location. Specifically, neoendemic species are those that have recently arisen, through divergence and reproductive isolation or through hybridization and polyploidy in plants. Paleoendemism, the other sub-category, refers to species that were formerly widespread but are now restricted to a smaller area. Examples "Darwin's finches", residents of the Galápagos Islands, have been used since the 19th century as an example of how the descendants of one ancestor can evolve through adaptive radiation into several species as they adapt to different conditions on various islands. Charles Darwin wrote:...one might really fancy that from an original paucity of birds in this archipelago, one species had been taken and modified for different ends." The Galápagos archipelago is also the home of paleoendemic species. The Santa Cruz cypress (''Hesperocyparis abramsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |