Problem
A species of algae that lives in river A has a nutrient stoichiometry of 106:16:1. River A is generally deficient in nitrogen and phosphorous. As River A flows towards the ocean River B enters. In the watershed of River B there is a source of nitrogen that ends up in River B.
• Will this addition of nitrogen cause any changes in the algal population? (why or why not)
River AB then meets with River C. River C has a large input of phosphorous from the watershed.
• Will the second nutrient addition from River C cause any changes in the algal population? (why or why not)
River ABC enters the ocean.
• What may happen next in the costal waters where the river meets the ocean? Why?