Hippo waste causes fish kills in Africa’s Mara River

Ecologists have long known that agricultural and sewage pollution can cause low oxygen conditions and fish kills in rivers. A new study reports that hippo waste can have a similar effect in Africa’s Mara River, which passes through the world renowned Maasai Mara National Reserve of Kenya, home to more than 4,000 hippos. https://www.sciencedaily.com/releases/2018/05/180516085640.htm