biodiversity gradient The gradual reduction in biomass and species numbers that occurs with increasing latitude. There are several theories to explain why life is more abundant in the tropics than in cooler regions. The simplest explanation is that the greater surface area of the planet at the equator, compared to the poles, provides more space in which species can evolve. Another theory suggests that the relative environmental stability of the tropics enables species to specialize to a greater extent, so that more can be packed into any given ecosystem. Further, the greater input of solar energy in the tropics increases available resources, resulting in greater biomass and population sizes compared to colder regions.
More From encyclopedia.com
Indifferent Species , indifferent species A species with no real affinity for any particular community, but which is not rare (as an accidental species would be). It is fi… Greater roadrunner , roadrunner, greater (Geococcyx californianus) See CUCULIDAE. Geococcyx californianus (greater roadrunner) See CUCULIDAE. greater roadrunner (Geococcy… preferential species , preferential species In phytosociology, a species that is present with varying abundance in several communities, but is especially abundant and vigor… Keystone Species , All ecosystems on Earth are formed of a delicate balance of species. When an ecosystem is at equilibrium , the relative numbers of organisms within e… Allopatry , allopatry The occurrence of species or other taxa in different geographical regions. Subspecies are allopatric by definition. Compare SYMPATRY. allop… Constant Species , constant species(constancy) In phytosociology, a species common to a particular association or community, but not necessarily confined to that commun…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like