Journal News: The oak and hickory trees at the edge of a Long Island Sound salt marsh stand silent but could serve as future markers of climate change. Surrounded by thorns, poison ivy and some mosquitoes on a recent day, the trees positions were measured relative to the marsh grass and other wetland plants. Scientists expect to return in a decade with their tape measure and GPS unit and again calculate the distance between the woods and the marsh. The goal of their research is to see if the marshes are keeping...