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Ch 25: Population Dynamics & Ecology

About This Chapter

Get lessons on population dynamics and ecology by watching the online videos found within this chapter. These videos will help you better understand the major topics related to animal populations and ecosystems.

Population Dynamics & Ecology - Chapter Summary

If you are interested in learning more about population dynamics and ecosystems in biology, you can go through this chapter and watch our interactive, online video lessons. Each lesson is dedicated to a different topic on animal populations and the relationships between organisms in ecosystems.

Watch these lessons to explore the basic definitions and concepts necessary for a proper understanding of biological ecosystems. You will learn about specific types of ecosystems and the ways in which different aspects of an ecosystem interrelate with one another. Some specific topics you will learn about are:

  • The definition and concept of population dynamics
  • Mating systems and social behaviors of animals
  • Species dispersion and migration
  • The definition and types of community ecology
  • The definition and importance of ecological niches
  • Natural habitats and prey/predator relationships
  • Symbiotic relationships, cycles of matter and food chains
  • The definition and examples of ecosystem homeostasis
  • The water and rock cycles
  • Minerals, erosion, weathering and soil
  • Porosity and an ecosystem's abiotic factors

Each video in this chapter contains helpful tags that will allow you to locate key moments from the lessons without having to scroll through the video in its entirety. You can also use the chapter's transcripts to study these topics away from your computer. Finally, be sure to take the lesson quizzes and final chapter exam to ensure that you have understood the main points from the chapter.

14 Lessons in Chapter 25: Population Dynamics & Ecology
Test your knowledge with a 30-question chapter practice test
Population Dynamics in Ecology: Definition & Concepts

1. Population Dynamics in Ecology: Definition & Concepts

In this lesson, we look at how population is an ecological concept just as it is a sociological one. We will look at wildlife populations by comparing them to human social actions and define key concepts for understanding population from an ecological perspective.

Carrying Capacity, Migration & Dispersion

2. 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.

Animal Mating Systems, Mate Choice, Sexual Selection & Male Competition

3. Animal Mating Systems, Mate Choice, Sexual Selection & Male Competition

Choosing a mate is the single most important thing that most animals will do for the continuation of their species. In this lesson, we look at what goes into mate selection, as well as how that biology may influence who we fall for.

Social Behavior of Animals

4. Social Behavior of Animals

Why does that squirrel flap its tail when your dog gets close to the tree? Or why are you more willing to donate a kidney to a sibling than a stranger? Learn about these and other behaviors that come along with living in a social group.

Community Ecology: Definition & Types

5. Community Ecology: Definition & Types

Community ecology looks at the interactions between populations of organisms. Here we explore a polar ecosystem in Greenland to describe what community ecology entails and what it really means to be at the top of the food chain.

Ecological Niche: Definition & Importance

6. 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 a Natural Habitat? - Definition & Habitat Destruction

7. 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.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

8. 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

9. 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.

Ecosystem Homeostasis: Definition & Examples

10. Ecosystem Homeostasis: Definition & Examples

What is ecosystem homeostasis? In this lesson, we'll talk about how ecosystems maintain their balance as populations cycle up and down, what it looks like when they do, and what it looks like when they don't.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

11. Food Chains, Trophic Levels and Energy Flow in an Ecosystem

In this lesson, you'll learn about food chains, food webs, and the different roles that organisms play in an ecosystem. You'll also learn about how energy flows through an ecosystem.

Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

12. Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and nitrogen fixation allow the carbon and nitrogen cycles to regenerate needed substances by recycling Earth's atoms.

The Water Cycle: Precipitation, Condensation, and Evaporation

13. The Water Cycle: Precipitation, Condensation, and Evaporation

This lesson discusses the processes water takes as it moves around the Earth in the water cycle. You'll get an in-depth look at condensation, precipitation, and evaporation.

Abiotic Factors of an Ecosystem: Definition & Examples

14. Abiotic Factors of an Ecosystem: Definition & Examples

When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.

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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