Ch 20: Populations & Relationships in Ecology

About This Chapter

11 Lessons in Chapter 20: Populations & Relationships in Ecology
Test your knowledge with a 30-question chapter practice test
What is a Natural Habitat? - Definition & Habitat Destruction

1. What is a Natural Habitat? - Definition & Habitat Destruction

There are many places that animals, plants, and other organisms call home - their natural habitats. In this lesson, you will go over a few natural habitats and discover ways in which some are being destroyed.

What Is Ecological Balance? - Definition & Importance

2. What Is Ecological Balance? - Definition & Importance

In this lesson, we'll discuss what ecological balance is and how it's important for the function of an ecosystem. We'll also explore some examples of ecological balance.

What is an Ecological Imbalance? - Definition & Explanation

3. What is an Ecological Imbalance? - Definition & Explanation

In this lesson, you will learn the definition of ecological imbalance and explore some examples of ecosystems that have shifted to a state of imbalance. Test your new knowledge at the end with a quiz.

What Is Biotic Potential? - Definition & Examples

4. What Is Biotic Potential? - Definition & Examples

What does the term 'biotic potential' mean? What are the factors that contribute to calculating and comparing the biotic potential of one organism to that of another? In this lesson you will learn the definition of this term as well as some of the ecological phenomena that surround it.

Ecological Niche: Definition & Importance

5. Ecological Niche: Definition & Importance

Most people want to feel like they belong and have an important role in society. This is also true in a biological aspect. In this lesson, we will learn about ecological niches as well as the roles of organisms and the various aspects of their lives.

What Is Secondary Succession? - Definition, Examples & Stages

6. What Is Secondary Succession? - Definition, Examples & Stages

In this lesson, we will investigate the process of secondary succession. Learn about where secondary succession happens, why it happens, how it happens, and what it looks like.

K-Selected Species: Definition & Examples

7. K-Selected Species: Definition & Examples

In this lesson, we'll examine one category of life history strategy, K-selection. Learn about the major characteristics of K-selection and some species that employ this strategy.

Predator in Ecosystems: Definition & Explanation

8. Predator in Ecosystems: Definition & Explanation

This lesson will define what predators are, explain how they behave, and discuss their role in an ecosystem. Examples of predators will also be given.

Dispersal in Ecology: Definition & Explanation

9. Dispersal in Ecology: Definition & Explanation

When you see a bunch of seeds floating through the air, they are dispersing in order to move to a new home. Both plants and animals disperse actively or passively. We'll discuss both ways in this lesson.

How Birth, Immigration, Emigration & Death Affect Populations

10. How Birth, Immigration, Emigration & Death Affect Populations

Populations change based on the births, deaths, immigrations, and emigrations that occur within the group. These additions and subtractions all affect population size, but do so in different ways.

Symbiotic Relationships List & Flashcards

Symbiotic Relationships List & Flashcards

With this set of flashcards, you will learn all about interactions between different lifeforms on Earth--some that are awesome and some that are pretty scary! Read this flashcard set to learn about concepts such as symbiosis, commensalism, mutualism and parasitism.

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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