Ocean Deoxygenation: Denise Breitburg

Lead author Denise Breitburg, a marine ecologist with the Smithsonian Environmental Research Center, is discovering how low oxygen can make life harder for fish and oysters in Chesapeake Bay. Besides making it more difficult for fish like silversides to avoid predators, falling oxygen levels can hamper oyster growth and reproduction, and make them more vulnerable to disease and death. (Photo: Tina Tennessen/Smithsonian)