Answer Happy

The Hubbard Brook forest is an experimental forest used for a variety of ecosystem studies. The graph below shows the nitrate concentration in the runoff water entering watersheds in the area before and after tree cutting resulted in deforestation of the area. Deforested 80 60 40 20 Nitrate concentration in runoff (mg/L) Completion of tree cutting Control ONWA 3 2 1 - M 1965 1968 1966 1967 Nitrogen in runoff from watersheds Created for Albert.io. Retrieved from https://www.albert./o/learn/ap-biology/question hubbard-brook-experiment. Used under the fair dealings provision of the Canadian Copyright Act. a) Describe the trend shown by the red line on the graph. Explain the effect of deforestation on the amount of nitrate retained in the soil. (2 marks) b) Predict how large-scale deforestation around the world might affect the nitrogen cycle. (2 marks)