If Rates of Nitrogen Fixation Increased Tenfold in Aquatic Ecosystems

question 23

Multiple Choice

If rates of nitrogen fixation increased tenfold in aquatic ecosystems, would you expect a tenfold increase in primary productivity?

• A)yes, because nitrogen is a limiting nutrient in aquatic ecosystems
• B)yes, because there is an abundance of dissolved carbon dioxide in aquatic ecosystems
• C)no, because there are other limiting nutrients in aquatic ecosystems besides nitrogen
• D)no, because there would be a higher increase in primary productivity

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