Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

Exercise 6

Consider the graph on the right that shows loss of calcium from the experimental cutover site of the Hubbard Brook Experimental Forest ( Core Case Study ) compared with that of the control site. Note that this figure is very similar to Figure 2-5, which compares loss of nitrates from the two sites. After studying this graph, answer the questions below.

In what year did the calcium loss from the experimental site begin a sharp increase In what year did it peak In what year did it again level off