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| 1 | Relationship between changes of biodiversity with oxygen content in atmosphere and mass of carbon-hydrogen stratum in the Phanerozoic is studied. Dynamics of biodiversity is represented by the cyclical changes of species diversity of sea animals in the Phanerozoic. Information about changes of sea animal biodiversity in the Phanerozoic was taken from Sepkosky database. The relationship between cyclical changes of oxygen content in atmosphere, mass of carbon-hydrogen stratum and changes of sea animal biodiversity in the Phanerozoic is revealed on base of temporal sets analysis of the above mentioned quantities. The revealed relationships were proved by correlation calculations. Keywords: Phanerozoic, biodiversity, number of sea animals species, oxygen in atmosphere, carbon-hydrogen stratum of lithosphere | 934 | ||||