By Sid Perkins
Over the past 90 years, rising water temperatures in Lake Tanganyika have dramatically reduced populations of the aquatic microorganisms at the base of the lake’s food chain, a new analysis shows.
More than 650 kilometers long and up to 50 km wide, Lake Tanganyika is by volume the world’s second-largest body of fresh water, surpassed only by Russia’s Lake Baikal. Lake Tanganyika winds through southeastern Africa’s Great Rift Valley and in spots is more than 1 km deep.