Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 44, Problem 3DAA
Iguana Decline In 1987, Martin Wikelski began a long-term study of marine iguanas in the Calapágos Islands. He marked iguanas on two islands—Genovesa and Santa Fe—and collected data on how their body size, survival, and reproductive rates varied over time. He found that because iguanas eat algae and have no predators, deaths usually result from food shortages, disease, or old age. In January 2001, an oil tanker ran aground and leaked a small amount of oil into the waters near Santa Fe. FIGURE 44.17 shows the number of marked iguanas that Wikelski and his team counted in their study populations just before the spill and about a year later.
FIGURE 44.17 Shifting numbers of marked marine iguanas on two Galápagos islands. An oil spill occurred near Santa Fe just after the January 2001 census (orange bars). A second census was carried out in December 2001 (green bars).
3. Wikelski concluded that changes on Santa He were the result of the oil spill, rather than sea temperature or other climate factors common to both islands. How would the census numbers be different from those he observed if an adverse event had affected both Islands?
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Chapter 44 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 44 - Most commonly, individuals of a population show a...Ch. 44 - Prob. 2SQCh. 44 - Suppose 200 fish are marked and released in a...Ch. 44 - Prob. 1DAACh. 44 - Prob. 2DAACh. 44 - Iguana Decline In 1987, Martin Wikelski began a...Ch. 44 - Prob. 4SQCh. 44 - For a given species, the maximum rate of increase...Ch. 44 - Prob. 6SQCh. 44 - A life history pattern is a set of adaptations...
Ch. 44 - The human population is now about 7 billion. It...Ch. 44 - Prob. 9SQCh. 44 - Prob. 10SQCh. 44 - Prob. 11SQCh. 44 - Prob. 12SQCh. 44 - Match each term with its most suitable...Ch. 44 - Think back to Section 44.6. When researchers moved...Ch. 44 - The age structure diagrams for two hypothetical...
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