Biology
Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 58, Problem 6TY
Summary Introduction

Introduction: Ecologists MacArthur and Wilson proposed a comprehensive model for succession on new islands. This was called the equilibrium model of island biogeography. Succession occurs by slow and gradual development, starting from a sterile beginning.

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Why are species that live at the tops of mountains at increased risk of extinction due to climate change?   a. The colder temperatures at the tops of mountains gradually increase, and the species at the tops of the mountains are displaced by species at lower elevations moving up.    b. The species at the tops of the mountains are adapted to moving up and down the mountains and species at lower elevations are displacing them as they move down the mountains.    c. The species at the tops of the mountains are adapted to lower oxygen and climate change increases oxygen content in the air.    d. Species at the tops of mountains do not have the genetic diversity for adaptation that lower-elevational species do. Therefore species at the tops of the mountains are more likely to go extinct.
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