Thursday, 29 September 2016

Hypervolume niche

Hypervolume Niche- The limits, for all important environmental conditions, within which individuals of a species can survive, grow and reproduce is termed as niche . If each condition, resource or other species is seen as a dimension, the niche is a n-dimensional hypervolume. 

Types of hypervolume niches-

 a. Fundamental niche 
 b. Realized. niche

 Fundamental niche is the the actual entire niche that an oraganism/ species occupy ,when species is not competing with others for its resources. But individual or a species normally remains in competition (either interspecific or intraspecific or both) and under such conditions, only a part of the niche is realized by the species. This smaller hypervolume occupied by the species is called realized niche.

Thus,each species has both fundamental niche within a community to which it is adapted in the evolutionary process, but because of competition it occupies a smaller niche, namely realized niche.
 In  competing zone due to competition, the reproductive success of each species and hence chances of survival reduced.

Individuals, who remain outside the overlapping competitive zone, are likely to have a greater survival rate and reproductive success.Natural selection favors individuals lying in the non-competing zone.

The fundamental niche is larger then the realized niche. The realized niche can be called a subset of the fundamental niche. 


Image result for fundamental niche

                                 Imge source credit -https://quizlet.com/75558972/bio-lecture-17-flash-cards/

When all of the boundaries of tolerance of diverse environmental influences are assembled into a single, multivariate factor. This is known as  the multidimensional zone (also known as a hypervolume) of environmental tolerance, in which an individual can potentially survive or in which a species can maintain viable populations. We can quantify in this the niche breadth and niche overlap .



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