Ridleys Theory on Endemism
Ridleys Theory on Endemism:
RIDLEY (1922) theory:- According to the view of Ridley in 1922 endemic species and the genera are the survival of the larger group of the past which are now in course of gradual extinction. According to him, the survivals are epibiotic i.e; they do not spread but remain as relics of the past in an isolated area due to some reason, as not been cover whelmed by later invading flora, these survivals are not provided with suitable and enough means of dispersion. To reach another area for their establishment. Hence, they become confined to a limited area.
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