Controls on Biomass: Nutrient Ratios in Streams and Rivers

Project Staff: 

Principal Investigator: Robert Sterner, Professor, Professor, Department of Ecology and Evolutionary Behavior, University of Minnesota


USGS-WRRI 104G National Grants Competition

Project Duration: 

September 1998 - August 2000


Final Research Report

In this project, experiments and measurements were performed to assess how the balance of light and nutrients influences the ratio of biomass:nutrients in streams from several regions in Minnesota. Experiments manipulated levels of light and nutrients, and periphyton responses were recorded. In addition, light, nutrients, and periphyton stoichiometry were surveyed in several regions in the state, and statistical models were used to explore these couplings.