About This Chapter
Relationships in an Ecosystem - Chapter Summary
The lessons in this chapter provide an overview of relationships in an ecosystem. You can review details about land conservation and sustainable development within environmental limits. These lessons will also take the angst out of understanding population ecology. After completing the chapter, you should be prepared to:
- List components of an ecosystem
- Discuss how animals survive in their surroundings
- Explain how energy is transferred through a food web
- Recall what causes habitat destruction
- Detail how ecosystems are preserved and restored
- Discuss how future generations can benefit from environmental resources
- Recount what causes a population to grow or decline
- Use simple methods of estimating the population size of organisms
Each lesson comes with a brief quiz to ascertain how much of the content you can recall. Video timelines let you study only the topics you need to review. Optimize this learning tool by printing the quiz in worksheet form to study offline.
1. What Is an Ecosystem? - Definition & Explanation
Similar to a car engine that is made up of multiple parts working together, an ecosystem has interacting parts that support a whole. But how do we define an ecosystem and what are the components they consist of?
2. Ecosystems, Habitats and Ecological Niches
Check out this video lesson to understand the many complex aspects of an ecosystem. See how animals live in habitats and survive amongst their surroundings.
3. What is a Food Web? - Definition & Explanation
This lesson will provide a definition of a food web, as well as describe its parts and discuss examples of different types. It will also explain the transfer of energy through a food web.
4. What is Habitat Destruction? - Effects, Definition & Causes
There are many types of habitat destruction that can change entire ecosystems. Habitat destruction can even wipe out an entire species instantly. This lesson covers what habitat destruction is, its effects, and what causes it to happen.
5. Land Conservation: Preserving and Restoring Ecosystems
Humans have degraded a large portion of natural land. The field of land conservation has become popular as a way to fix this problem. Land conservation attempts to combat land degradation through preservation, restoration, remediation, and mitigation.
6. Sustainable Development within Environmental Limits
Sustainable development is a way of meeting the needs of both present and future generations. Learn how sustainable development must work within the environmental limits so future generations can benefit from the rich resources of the environment.
7. Population Ecology: Environmental Effects on Population Size
Populations can range from the very small to the very large, but the size and prosperity of all populations are influenced by a few basic things. In this lesson we'll discuss the important factors that cause a population to grow or decline in size.
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Other chapters within the ISEB Common Entrance Exam at 13+ Science: Study Guide & Test Prep course
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- Energy Resources & Conservation
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- Light Waves & Properties
- Basics of Circuits
- Magnetism & Electromagnets
- Physics of Space
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