Data from: Historical climatic instability predicts the inverse latitudinal pattern in speciation rate of modern mammalian biota ...

• Main Authors: Morales-Barbero, Jennifer, Gouveia, Sidney F., Martinez, Pablo A.
• Format: Dataset
• Language: English
• Published: Dryad 2020
• Subjects: FOS Earth and related environmental sciences; Antarctic; Antarctic Ocean; Antarc*
• Online Access: https://dx.doi.org/10.5061/dryad.866t1g1pc; https://datadryad.org/stash/dataset/doi:10.5061/dryad.866t1g1pc

Evolutionary rate explanations for latitudinal diversity gradients predict faster speciation and diversification rates in richer, older, and more stable tropical regions (climatic stability hypothesis). Numerous modern lineages have emerged in high latitudes, however, suggesting that climatic oscillations can drive population divergence, at least among extratropical species (glacial refugia hypothesis). This conflicting evidence suggests that geographical patterns of evolutionary rates are more complicated than previously thought. Here, we reconstructed the complex evolutionary dynamics of a comprehensive dataset of modern mammals, both terrestrial and marine. We performed global and regional regression analyses to investigate how climatic instability could have indirectly influenced contemporary diversity gradients through its effects on evolutionary rates. In particular, we explored global and regional patterns of the relationships between species richness and assemblage-level evolutionary rates and ... : After computing evolutionary rates for each species using BAMM, we calculated the mean speciation rate (MS) and mean net diversification rate (MDN) of all species of mammals per grid cell (Table_MS_MDN.csv). Grid cells at a 1° × 1° resolution We estimated historical climatic instability (CI) as the difference between the mean annual temperature of the last glacial maximum and the present mean annual temperature in each cell, for both landmasses and the sea surface (Table_CI.csv). This dataset excluded Antarctic Ocean information (above latitude 70°S). Grid cells at a 1° × 1° resolution. ...