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This territoriality only breaks down when there is a glut of food, for example when grizzly bears are attracted to migrating salmon. Food related territoriality is least likely with insectivorous birds, where the food supply is plentiful but unpredictably distributed. Swifts rarely defend an area larger than the nest.
In ecology, an ideal free distribution (IFD) is a theoretical way in which a population ' s individuals distribute themselves among several patches of resources within their environment, in order to minimize resource competition and maximize fitness.
Spatial ecology studies the ultimate distributional or spatial unit occupied by a species. In a particular habitat shared by several species, each of the species is usually confined to its own microhabitat or spatial niche because two species in the same general territory cannot usually occupy the same ecological niche for any significant ...
Arthur Tansley picked this definition up in 1939 and elaborated it. He stated that an ecotope is "the particular portion, [...], of the physical world that forms a home for the organisms which inhabit it". In 1945 Carl Troll first applied the term to landscape ecology "the smallest spatial object or component of a geographical landscape". Other ...
Examples include the giant panda, the Bengal tiger, and the blue whale. Compare flagship species. chemical ecology A branch of ecology which studies the use by organisms of naturally occurring chemical compounds for various purposes, e.g. in defense against predators. climate The long-term average weather patterns of a particular place. climate ...
An isodar, or habitat isodar, is a theory in evolutionary ecology developed in the late 1980s by Douglas W. Morris. [2] [3] Isodars model density-dependent habitat selection for one or two species in two habitats according to the ideal free and ideal despotic distributions.
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Examples include tundra, taiga, temperate deciduous forest, tropical rain forest, grassland, deserts. [ 1 ] Terrestrial ecosystems differ from aquatic ecosystems by the predominant presence of soil rather than water at the surface and by the extension of plants above this soil/water surface in terrestrial ecosystems.