Ch 18: Ecology, Ecosystems & the Environment

About This Chapter

Improve your understanding of ecology, ecosystems and the environment, including topics like decomposers in ecosystems and symbiotic relationships. If you are preparing for an exam or class discussion, these lessons and quizzes will help boost your confidence by testing your knowledge of the topics in advance.

Ecology, Ecosystems & the Environment - Chapter Summary

In these lessons on ecology, ecosystems and the environment, you will learn about levels of ecology and ecosystems. There is also a discussion about niche differentiation and predator/prey interactions. By the end of the chapter, you should feel confident and prepared to:

  • Distinguish the difference between an environment and an ecosystem
  • Explain the actions and appearance of some animals
  • Describe how producers, consumers, and decomposers interact with one another in ecosystems
  • Recall the positive and negative effects of symbiosis on species
  • Describe the outcomes of interspecific competition
  • Explain how resources are shared by members of the same species
  • Discuss the stages and climax of ecological succession

The clear and easy-to-follow teaching style used by our educators will help you get up to speed on the topics covered in a short amount of time. A concise quiz is available for each lesson to test your understanding of what you review in the lessons. You can also print the lesson quizzes and use them as worksheets.

7 Lessons in Chapter 18: Ecology, Ecosystems & the Environment
Test your knowledge with a 30-question chapter practice test
The Environment, Levels of Ecology and Ecosystems

1. The Environment, Levels of Ecology and Ecosystems

Do you know the difference between an environment and an ecosystem? In this lesson, you'll find out what makes an environment, and what makes an ecosystem. You'll also learn what ecology is and some of the ways that scientists study ecology using organisms, populations, communities, ecosystems and even the entire biosphere.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

2. Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

You probably know that skunks can be quite stinky, bees sting and monarch butterflies are pretty, but do you know why? This lesson will introduce you to the reasons why some animals look or act the way they do and how these things relate to the predator/prey relationship.

Producers, Consumers & Decomposers in Ecosystems

3. Producers, Consumers & Decomposers in Ecosystems

In this lesson we will learn about producers, consumers, and decomposers. Find out what they are and how they interact with one another in the ecosystem.

Symbiotic Relationships: Mutualism, Commensalism & Parasitism

4. Symbiotic Relationships: Mutualism, Commensalism & Parasitism

If your cat or dog has ever had fleas, you've witnessed symbiosis in action. In this lesson, learn the many types of symbiosis in biology, and how these relationships can have a positive, negative, or neutral effect on the individual species.

Interspecific Competition, Competitive Exclusion & Niche Differentiation

5. Interspecific Competition, Competitive Exclusion & Niche Differentiation

What happens when two similar species that consume the same resources occupy the same space? Interspecific competition, that's what! Watch our video lesson to learn about the outcomes of this ecological battle.

Intraspecific Competition: Example & Definition

6. Intraspecific Competition: Example & Definition

How do members of the same species share resources? There's an ongoing struggle among individuals of the same species called intraspecific competition, and this competition is one way that nature controls how large a population gets.

Ecological Succession: From Pioneer to Climax Communities

7. Ecological Succession: From Pioneer to Climax Communities

Just as people grow and change so, too, do ecosystems. Watch this lesson to learn about ecological succession from the beginning stages of development to a community's ultimate destination, or climax.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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