sd.jpeg (IMAGE)

Harvard University, Department of Organismic and Evolutionary Biology

sd.jpeg

Caption

The left panel illustrates the shift of the latitudinal region where all groups were equally abundant and were present in the highest diversity (in blue). The bands shifted from high to mid-latitudes (8 million years ago) to low latitudes today due to increased particulate organic carbon and oxygen availability with depth as well as the presence of bipolar ice sheets, which increased the gradient of temperature between high and low latitudes. (SML in the right panel refers to the surface mixed layer, where the turbulence is generated by winds, and processes such as evaporation or sea ice formation cause an increase in salinity).

Credit

Anshuman Swain

Usage Restrictions

Permission to use with proper citation

License

Original content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.