Global Estimates of Denitrification in Terrestrial Ecosystems Vary Widely but Are

Multiple Choice

Global estimates of denitrification in terrestrial ecosystems vary widely but are of the order 200 × 1012 g/yr,and more than half of that total occurs in wetland ecosystems.If restoration results in an increase in wetland area by approximately 25 percent,it would be expected that losses of nitrogen through denitrification would be closer to

A) 175 × 1012 g/yr.
B) 225 × 1012 g/yr.
C) 275 × 1012 g/yr.
D) 325 × 1012 g/yr.