What approach did NAWQA use to study effects of nutrient enrichment on algal biomass?
In 2001, NAWQA began a study to address the effects of nutrient enrichment on stream ecosystems in five agricultural areas across the U.S. In each study area, 20 to 30 independent, wadeable stream sites distributed along a gradient of nutrient concentrations were selected. Data collected during the growing season included nitrogen and phosphorus, algal chlorophyll a, and stream habitat. More information on study design can be found at Effects of Nutrient Enrichment on Stream Ecosystems web site.
