The March issue covers the Estuary north, south, east and west. It details lessons being learned from a rock barrier on the False River designed to prevent salt water intrusion into the Delta, and says farewell to the grande dame of Bay research, a yacht called the Polaris now being replaced with a catamaran. The issue also explores the buzz on “resilience” in climate change planning and then gives the low down on two recent restorations at opposite ends of the Bay: one on Sonoma Creek and the other at Bair Island. An opinion piece urges support for Measure AA and science news tracks El Niño effects on the movement of mercury and sediment.