After a long battle with The National Parks Service, the Drakes Bay Oyster Company in Point Reyes, California shut down for good.

The oyster farm had been there for 80 years, but lost its lease with the federal government after the Park Service decided the land should be returned to nature.

Writer Summer Brennan has captured the dispute over Drakes Bay in a new book called "The Oyster War: The True Story of a small farm, big politics, and the future of Wilderness in America."

But as Brennan explained, there has always been a debate around the scientific basis for the decision to close down the farm.