by Kristen Minogue

A scientist tests water quality and seagrass biomass on the Susquehanna Flats, in upper Chesapeake Bay. (Cassie Gurbisz)

For a long time, it seemed the odds were never in their favor. With seagrass wasting disease, hurricanes and chronic pollution, tens of thousands of acres of Chesapeake Bay underwater plants vanished between the 1950s and 1970s, marking the largest decline in over four centuries. But now, thanks to concerted efforts to rein in harmful nutrients like nitrogen and phosphorus, underwater flora can celebrate a new victory: the largest underwater grass resurgence ever recorded.

A team of 14 Chesapeake scientists came out with the discovery on Monday, in a new study published in Proceedings of the National Academy of Sciences. The scientists found that since 1984, average nitrogen levels in the Bay have dropped 23 percent, and phosphorus has dropped 8 percent. As a result, underwater plants in Chesapeake Bay have shot up more than four-fold. Click to continue »

by Cosette Larash and Claire Mueller

For the last three years, a team of biologists from the Smithsonian Environmental Research Center has been tracking stingrays, sharks and other species along the East coast of the United States. Matt Ogburn and Charles Bangley are leading the project, in an effort to learn more about these charismatic yet often misunderstood animals. It’s part of the Movement of Life Initiative, a developing program in animal tracking research conducted by Smithsonian Institution researchers and their colleagues.

Ogburn and Bangley are focusing on five species: Cownose Rays and four major species of sharks (Bull Sharks, Blacktip Sharks, Dusky Sharks, and Smooth Dogfish). They began tagging cownose rays in 2014, and added on sharks in 2016. By understanding the movement patterns of these animals, the Smithsonian biologists and their colleagues hope to unlock some of the mystery that surrounds them. For example, scientists know Cownose Rays are born in the Chesapeake Bay and return when they’re about four years old, but no one knows where they go in the meantime. The sharks they are studying all occupy similar areas, but use underwater habitats differently. By learning how and where these organisms move, they can understand their environment as well.

In the future, the scientists hope to use the data to uncover when and why these species occupy different areas, and determine the potential impact of human activities such as fisheries and offshore wind farms. Check out the videos above and below to learn more about these projects.

Learn more about the Smithsonian’s Movement of Life Initiative

Learn more about Ogburn and Bangley’s Movement of Life work tracking aquatic migrations