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Most importante Ecological factors of the Hypogeon life.

(Hypogeon means the habitat of the organisms living under the suface of the ground, Epigeon is the habitat of organisms living up the surface of the ground.)

Environmental limits for life. This means that species live in places that are not usual for life and that they are most influenced by the climatic factors.
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It can be compared to life in deserts, high mountins and deep sea. In deserts life is hard due to the absence of water and very hot conditions. In highj mountins there is a lot of snow during the year, it is cold and freezes. Under deep see the pressure is high and there is no light. All factors that makes it hard to live. 
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Poor Biodiversity. Number of Faunistic and Floristic species, very low. In these habitats the number of species is very low.  Much less than life of normal places. The higher you go in the mountins less species you find. It is the same thing if you go more north from the equator to the pole. 
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Species are most specilized in there invironment. The specialization is very important. Only specialized animals can survive and live in such difficult climets. For example in deep sea it is totaly dark and many species have organs that make light in order to make it easy for finding food or mate. 

 
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