•What is Biogeography?–Geographic distribution of organisms.–Describe and understand patterns.–Interprets aspects of both ecology andevolutionary biology.
•Why is it important?–Need to understand a species’ ecologicalrequirements.•Biotic•Abiotic
•Questions explored in this chapter:–How did a species come to occupy its presentrange?–How have geological events shapedistribution?–Why are some closely related speciesconfined and others widely separated?
•Ecological Factors Affecting Distributionsof Marine Mammals–Water temperature–Patterns of food distribution–Other factors discussed in later chapters:•Buoyancy•Resistance•Osmotic challenges•Heat loss
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•Sea ice forms in polar and subpolar zonesand reaches maximum extent in winter.•