As sediment washed in from the sea slowly transforms the historic lagoon into a salt marsh, scientists working to restore habitat are catching onto a larger challenge presented by rising sea levels: the vanishing of intertidal habitat favored by migrating birds. David Briggs

On the portion of Highway 1 that hugs Bolinas Lagoon, a few yellow hazard signs alert oncoming drivers: “FLOODING.” They are leftover from the last rainfall, but to the members of the Bolinas Lagoon Advisory Council, the diamond-shaped warnings may as well be portents sent from a future plagued by sea-level rise and big coastal storms.

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