Nunatak hypothesis

Hypothesis regarding ecology in formerly glaciated regions

In biogeography, particularly phytogeography, the nunatak hypothesis about the origin of a biota in formerly glaciated areas is the idea that some or many species have survived the inhospitable period on icefree land such as nunataks. Its antithesis is the tabula rasa hypothesis, which posits that all species have immigrated into completely denuded land after the retreat of glaciers.

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