If rates of nitrogen fixation increased tenfold in terrestrial ecosystems, would you expect a tenfold increase in primary productivity?
A)Yes, because nitrogen is a limiting nutrient in terrestrial ecosystems.
B)Yes, because there is an abundance of carbon dioxide in terrestrial ecosystems.
C)No, because there are other limiting nutrients in terrestrial ecosystems besides nitrogen.
D)No, because there would be a higher increase in primary productivity.

Question

Quizplus · Accepted Answer

While nitrogen is a limiting nutrient in terrestrial ecosystems, there are other nutrients such as phosphorus and potassium that may also limit primary productivity. Thus, increasing nitrogen fixation alone may not result in a proportional increase in primary productivity.

If Rates of Nitrogen Fixation Increased Tenfold in Terrestrial Ecosystems