Precession forcing of productivity in the Eastern Equatorial Pacific during the last glacial cycle

► Precession control of plankton assemblages and bioproductivity over the last glacial cycle. ► Atmospheric forcing of bioproductivity changes via the enlargement of Costa Rica Dome. ► Conspicuous changes in planktic assemblages over terminations. ► Amplification of precession forcing by the ocean tunnelling at terminations.