Evolution of the ecosystems of lower Permian skeletal mounds of Northern Urals

The ecosystems of the Lower Permian skeletal mounds of the Northern Urals were examined. Three inner and nine outer factors, affected on their evolution, were extract. Indicate that the Lower Permian skeletal mounds were limited by a wave base. The ecologic succession of the mounds were defined as an allo-autogenous type. The recycling of the ecologic succession stage allow to take the Lower Permian reefogenic types sections to skeletal mounds rhytmits.