Published

The Integrated Pacific Decadal Oscillation index (PDO, red) nicely predicts the variation in an important species of krill (Nyctiphanes simplex, blue) in the CCE site.
Credit: Di Lorenzo & Ohman, 2013

More than 60 years of zooplankton census data revealed that some populations respond indirectly to climate changes in two stages: first, ocean circulation responds to wind, then the zooplankton population level responds to ocean circulation. This broadly applicable principle of ‘double integration’ implies that direct correlations with climate variables should be replaced by metrics that reflect the biological time scale (e.g., life span) of the organisms concerned.

 

Learn more

  1. Di Lorenzo E, Ohman MD. 2013. A double-integration hypothesis to explain ocean ecosystem response to climate forcing. PNAS. doi 10.1073/pnas.1218022110

Contact

Mark Ohman
mohman@ucsd.edu

Posted:  July 15, 2020