Essentials of Ecology

ACADEMIC.CENGAGE.COM/BIOLOGY/MILLER 121

LEARNING ONLINE

ing and research. These include flash cards, practice quiz-

zing, Weblinks, information on Green Careers, and InfoTrac®

College Edition articles.

1. What was the approximate carrying capacity of the
   penguin population on the island from 1960 to 1975?
   (Hint: See Figure 5-11, p. 111.) What was the approxi-
   mate carrying capacity of the penguin population on the
   island from 1980 to 1999?

Log on to the Student Companion Site for this book at

academic.cengage.com/biology/miller, and choose

Chapter 5 for many study aids and ideas for further read-

DATA ANALYSIS

The graph below shows the changes in size of an Emperor

Penguin population in terms of breeding pairs on Terre

Year

Breeding pairs

1955 1960 1965 1970 1975 1980 1985 1990 1995 2000

2,000

3,000

4,000

5,000

6,000

2. What is the percentage decline in the penguin population
   from 1975 to 1999?

Source: Data from Nature, May 10, 2001.

Adelie in the Antarctic. Use the graph to answer the questions

below.