By Vanessa K. Harper     Photos by Craig O’Neal Land as Old as Time At sunrise, Guana feels suspended in time. Light lifts slowly across the estuary, catching the edges of sawgrass and open water. A great blue heron moves through the shallows before lifting suddenly into the morning sky. Moments like this can feel timeless. But they are not. Places like Guana do not exist by accident. They exist because, over generations, people decided they should. Today, that decision can no longer remain passive. The Guana River estuary, one of Northeast Florida’s most important coastal ecosystems, is now part of...