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"Realized Niche Width" is a phrase relating to ecology defining the actual space that an organism inhabits. Image File history File links This is a lossless scalable vector image. ... For the journal, see Ecology (journal). ... “Life on Earth†redirects here. ...
Niche Width vs Realized Niche Width
The Niche Width of an organism refers to the area which that species could physically inhabit. This area is defined by suitable climate and available food sources appropriate to that species as well as other factors such as temperature and air or water pressure levels. For other uses, see Species (disambiguation). ...
The Niche Width often differs from the area that a species actually inhabits, or its Realized Niche Width. This is due to competition with other species within their ecosystem and other variable limiting factors. A coral reef near the Hawaiian islands is an example of a complex marine ecosystem. ...
The physical area where a species lives, is its "habitat". The abstract hypercube that defines the limits of environmental features essential to that specie's survival, is its "niche". ( CIT : ECOLOGY , Begon,Harper,Townsend . ) - Willie
References
Paul A. Keddy (1983). "Shoreline Vegetation in Axe Lake, Ontario: Effects of Exposure on Zonation Patterns". Ecology64 (2): 331–344.
The niche of several species of woodpeckers, owls, chickadees and other birds, as well as flying squirrels, might entail using tree cavities for nesting or roosting.
Fundamental vs. realizedniche -- in the absence of competitors (that absence may not actually occur in the real world) a species will tend to have a characteristic nichewidth.
In the presence of competitors, however, it may be restricted to a narrower portion of its fundamental niche -- that is its realizedniche.
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