OAKLAND, Calif. -- When it blooms, red algae emits toxic byproducts, including aerosols, that kill shellfish and other marine life. People who eat shellfish that have been exposed can be at risk too.
Northeastern University graduate student Amelia Langan's research helped a Bay Area startup develop a device that could prevent toxic algae from forming dead zones in ocean waters.
During her third and final co-op, Langan worked on a small team researching the use of different light wavelengths to detect algae blooms before they can do harm.
Ocean algae can develop into harmful "red tides" when water loaded with excess nutrients from fertilizer and sunlight combine to lead photosynthesis to go out of control, killing off animals and plants.
"I hadn't known about the impacts of harmful algal blooms or aerosols," Langan says. "I have gained an extra appreciation for how interconnected everything is and how I get to contribute in whatever way I can to something that is really existentially overwhelming."
Langdon graduated from Northeastern University in 2023 with a degree in biochemistry and went straight into a plus-one master's program in biotechnology, which she completed in December. Working at LineSpect, an industrial camera company based in Mill Valley, California, she co-authored a proof of concept proposal for federal funds to develop the device and researched its potential commercial applications.
Current technology to detect developing algae blooms is cumbersome and expensive, Langan says. LineSpect's devices are smaller and function as a monitoring system submerged across the ocean, like a group of weather stations, to send images and data to the National Oceanographic and Atmospheric Administration. NOAA then coordinates with the Environmental Protection Agency to eliminate developing blooms, which are common off the coasts of Florida and California.
"When they bloom, they suck up all the oxygen out of the ocean," she says. "Aerobic organisms like bacteria and bigger organisms like fish who need the dissolved oxygen in the water to survive will die."
When Langdon started as a behavioral neuroscience and biochemistry major at Northeastern, she was sure she wanted to do clinical research working on human samples. But in spite of her plans to grow out of it, Langdon continued to be squeamish about human blood.