WMAO / OWRC Water Luncheon Seminar : Macro- and Micro-nutrient Control of Algal Growth in Great Lakes Aquatic Ecosystems
Byrd Polar and Climate Research Center
Byrd Polar and Climate Research Center
1090 Carmack Road
Columbus, OH 43201
United States
Registration: -
The increased frequency and extent of harmful algal blooms (HABs) has sparked the need for greater knowledge about the physical factors that control algal growth. Although primary producers require at least 20 different elements, the vast majority of what is known about nutrient limitation in aquatic ecosystems focuses on just two elements: N and P. Macronutrients (N and P) provide the fuel for algae but micronutrients (e.g., Fe, Mo, Zn) form the enzymatic engines that promote rapid and efficient growth. Using the theories of nutrient limitation and ecological stoichiometry, I can make predictions about the mechanisms of macro- and micro-nutrient limitation under different ambient water quality conditions. I will present data from nutrient manipulation experiments completed in the Great Lakes and neighboring tributaries that demonstrate micro-nutrient limitation in both pristine and human-dominated basins and watersheds. These data demonstrate that a more holistic view of elemental requirements is needed to understand the physical drivers of algal growth in the Great Lakes.