Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 57 - Dynamics of Ecosystems - Figure 57.20 - Inquiry Questions: a

Answer

This is true because at low levels of productivity, few species can obtain enough resources to survive, and at high levels of productivity, there are enough herbivores present to eliminate most species.

Work Step by Step

Think about income: lots of people have intermediate incomes, but few survive on very little and few can do what is needed to obtain and hold great wealth.
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