During the 1960s,a group of scientists in the northeastern United States conducted an experiment at Hubbard Brook,New Hampshire.A 38-acre watershed was completely deforested and the runoff (water flow)monitored for several years.It was compared to an adjacent watershed that was left untouched.The scientists collected data during those years and found that
A)there was no difference in the amount of runoff from the two areas.
B)there was a difference but it was not significant,and there was less nitrogen in the runoff from Hubbard Brook than at the control site.
C)there was a tremendous increase in the total amount of runoff but the nitrogen levels were fairly constant in both areas.
D)there was a tremendous increase in the amount of runoff and the nitrogen levels in the runoff were huge compared with the control.
E)there was a tremendous increase in the amount of runoff but the vegetation was able to reestablish itself very quickly and the runoff soon returned to its normal level.

Question

Quizplus · Accepted Answer

The deforestation led to a significant increase in runoff and nitrogen levels because the removal of trees reduced water absorption and nutrient uptake, leading to more water and nutrients being washed away.

During the 1960s,a Group of Scientists in the Northeastern United