Question

In the Hubbard Brook, NH watershed deforestation experiment, which of the following happened soon after the forest was clear-cut: Select one:

a. detritus and debris in the stream outflow decreased

b. runoff decreased

c. nitrate ions increased in the runoff up to 60X

d. transpiration increased e. phosphate ion concentration in runoff stayed about the same

Answer 1

Correct option C

NH watershed deforestation experiment , there is nitrate ions increased in the runoff upto 60X than in the undisturbed forest

The nitrate concentration in the water increased from < 1 -2 mg/L to more than > 50-60 mg/ L in the deforested area

-----> Detritus and debris in the stream outflow are increased due to deforestation

--------> runoff increased

---------> transpiration decreased

-----------> phosphate ion concentration decreased