In this episode of From the Field, guest Abbie Gascho Landis, Author of a book entitled “Immersion: The Science and Mystery of Freshwater Mussels,” explains how Freshwater Mussels perform ecosystem services by cleaning rivers and streams that eventually make their way into our water supply. One catch, 70% of Freshwater Mussels are gravely imperiled and endangered due to pollution, man made dams and a warming climate.