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Ch 13: Holt McDougal Biology Chapter 13: Principles of Ecology

About This Chapter

The Principles of Ecology chapter of this Holt McDougal Biology Companion Course helps students learn the essential lessons associated with ecology. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Principles of Ecology textbook chapter.

How It Works:

  • Identify the lessons in the Holt McDougal Principles of Ecology chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the ecological science topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • The definition of ecology and ecosystems
  • Methods used to research ecological phenomenon
  • How an ecosystem functions
  • The hydrologic cycle and its relationship with evaporation and transpiration
  • Basics of the phosphorous cycle, nitrogen cycle, and carbon cycle

Holt McDougal is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

11 Lessons in Chapter 13: Holt McDougal Biology Chapter 13: Principles of Ecology
Test your knowledge with a 30-question chapter practice test
What Is Ecology? - Definition & Explanation

1. What Is Ecology? - Definition & Explanation

From the largest animals to bacteria invisible to the human eye, the survival of any organism depends on its interaction with the environment. In this lesson you will learn the basics about ecology, the scientific study of these interactions.

The Environment, Levels of Ecology and Ecosystems

2. 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.

Ecological Research Methods: Observation, Modeling & Experimentation

3. Ecological Research Methods: Observation, Modeling & Experimentation

What is ecology? And how do ecologists research ecosystems? Learn about the three main research methods: observation (including direct and indirect surveying), modeling, and experimentation in or outside the lab.

Abiotic Factors of an Ecosystem: Definition & Examples

4. 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.

What Is Conservation Biology? - Definition & Principles

5. What Is Conservation Biology? - Definition & Principles

Conservation biology aims to reduce the human impact on the environment by looking for the causes and possible solutions to these problems. In this lesson, you'll learn about conservation biology and the different types of conservation.

Autotrophs and Heterotrophs

6. Autotrophs and Heterotrophs

Ever wonder where your energy comes from? What about a plant's energy? And where does it go? Learn about the flow of energy through the food chain in this lesson on autotrophs and heterotrophs.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

7. 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.

How Evaporation & Transpiration Contribute to the Hydrologic Cycle

8. How Evaporation & Transpiration Contribute to the Hydrologic Cycle

Evaporation and transpiration are important components of the water cycle, and while they are the same process they arise from different sources. In this video lesson you will learn about these two parts of the cycle and how they contribute to the overall movement of water on Earth.

Biogeochemical Cycling and the Phosphorus Cycle

9. Biogeochemical Cycling and the Phosphorus Cycle

In this video lesson, we'll take a look at how elements large and small use other elements to grow. This is achieved through cycles. We'll look at macronutrients, trace elements and the biogeochemical and phosphorous cycles.

Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

10. 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.

What Is Biomass? - Definition & Explanation

11. What Is Biomass? - Definition & Explanation

In this lesson, you'll learn what ecologists use to quantify the amount of matter in an ecological community. This often relates to the amount of energy being produced by various parts of that community.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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