Mammal diversity and primary production

Analysis of more than 14,000 Northern-hemisphere mammal fossils and estimates of prehistoric primary plant biomass production based on fossil plant communities reveal that high levels of primary production are associated with high mammal diversity throughout the Neogene, 23-1.8 million years ago; the study also finds that current mammal diversity and primary production values do not fit this 20 million-year-old pattern, suggesting that human activity and Pleistocene climate variability may have modified the relationship by reducing primary productivity and increasing mammal extinction. - Read at PNAS.org

Article #16-02145: “Twenty-million-year relationship between mammalian diversity and primary productivity,” by Susanne A. Fritz et al.