Extinction and diversification in the devonian brachiopoda of New York State: No correlation with sea level?

Sea level highstand is generally considered to promote high species diversities among marine organisms through habitat expansion and global climatic amelioration, and marine regression to trigger elevated extinction rates among marine benthic organisms by habitat reduction (the species-area effect), and among both marine and terrestrial organisms by global climatic deterioration. The Devonian is unusual in that the Late Devonian mass extinction occurs during an interval of global sea level highstand. To further explore this anomaly, the potential relationship between relative sea level and evolutionary biology is analyzed here for the Brachiopoda of the Devonian Period. Successive linear modeling reveals a total lack of correlation between relative sea level and either origination rates, extinction rates, or standing diversity among the Devonian brachiopods.