Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 57 - Dynamics of Ecosystems - Figure 57.7 - Data Analysis - Page 1215: 1

Answer

About 40 times.

Work Step by Step

From Fig. 57.7, the average for the deforested watershed after deforestation is about 40 (draw a straight line through the middle of the graph), while it is about 1 for the undisturbed watershed. From 1 to 40 is an increase of about 40 fold.
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