Ch 30: OAE - Biology: Populations & Communities

About This Chapter

Employ these short, helpful video lessons in order to learn more about ecological populations and communities so you won't face any problems on the OAE Biology test.

OAE - Biology: Populations & Communities - Chapter Summary

The subject of ecological communities covers a large area and might seem daunting to have to learn about. With these vibrant, fun video lessons, we will teach you all about populations and communities in an easily understandable way. Draw on what you've learned when you take the OAE Biology test. When you're done with this chapter, you'll be able to:

  • Measure density, survivorship and life histories of a population
  • Discuss how different species compete for resources in the same environment
  • List the methods utilized by prey to defend from predators, including camouflage and warning coloration
  • Differentiate between types of symbiotic relationships
  • Analyze the carrying capacity of a habitat and how it affects migration and dispersion
  • Describe why species disperse from one area and migrate to another
  • Explain common terms in conservation biology
  • Track the ecological succession of a community
  • Understand how introducing a new species alters ecological balance

Each of our videos walks you through a different aspect of ecological communities and populations. Our lesson instructors have organized these videos in order to make complex subjects like habitat fragmentation and interspecific competitions seem less intimidating. Once you're done studying, try out our sample OAE Biology test questions in the self-assessment section.

Objectives of the Populations & Communities Chapter

The Ohio Assessments for Educators (OAE) is the Ohio state licensure exam that one must pass in order teach. Educators who wish to teach life sciences to 7th graders and older need to score a 220 on an adjusted range of 100-300 on the OAE Biology test. Questions are based on a pre-established standard of pedagogical knowledge decided on by the state of Ohio.

There are five domains on the test. These lessons will prepare you to answer questions about populations and communities that will appear in the ecology and environment domain of the OAE Biology test. This section constitutes 20%, or 30 questions, of the overall test. You will have three hours to complete the 150 multiple-choice questions.

9 Lessons in Chapter 30: OAE - Biology: Populations & Communities
Test your knowledge with a 30-question chapter practice test
Populations: Density, Survivorship and Life Histories

1. Populations: Density, Survivorship and Life Histories

Have you ever wondered how biologists determine the populations of animals in a particular geographic area? Watch this video lesson to find out, and discover how scientists look at the survivorship and life histories of many different species.

Interspecific Competition, Competitive Exclusion & Niche Differentiation

2. 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.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

3. 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.

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.

Carrying Capacity, Migration & Dispersion

5. Carrying Capacity, Migration & Dispersion

Have you ever wondered why some types of birds fly south in the winter or why some animals form territories? Watch this video to learn about a species' maximum growth capabilities, the way its members group themselves and why they might migrate to new locations every year.

Dispersal, Colonization, and Island Biogeography

6. Dispersal, Colonization, and Island Biogeography

Have you ever gone in your backyard and discovered a wild raspberry bush that has never been there before? How did it get there? Why is there only one bush year after year? In this lesson, you'll study how plant and animal species colonize in new areas through dispersal and immigration and how some species thrive in a new area while others fail.

Conservation Biology, Habitat Fragmentation, and Metapopulations

7. Conservation Biology, Habitat Fragmentation, and Metapopulations

It's becoming harder to conserve large, unbroken tracts of wilderness. Is there another way for conservation biologists to ensure the survival of a species? In this lesson, you'll learn about habitat fragmentation and metapopulations.

Ecological Succession: From Pioneer to Climax Communities

8. 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.

How Introduced and Invasive Species Alter Ecological Balance

9. How Introduced and Invasive Species Alter Ecological Balance

What happens to your block when a new neighbor moves in? Something changes, right? Now think about that on an ecological scale: what happens to an environment when a new SPECIES moves in?

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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