The Hidden Dilemma: Disrupted Nutrient Cycles in the World's Largest Lakes

o In the past two decades Lake Victoria and Lake Tanganyika in Africa and Lakes Michigan and Huron have undergone unexpected and rapid changes in their internal cycling of nutrients in response to climate variability in Africa and invasive species in North America. The internal nutrient cycling in lakes is obscure and difficult to study yet fundamental to understanding the water quality and productivity of these large lakes. New approaches to resolving internal loading are urgently required.