About This Chapter
Ecology & Biodiversity - Chapter Summary
This chapter helps you review ecology and biodiversity. You'll look at what makes up the environment and explore the difference between the environment and an ecosystem. You'll also take a look at the definition of a habitat, the interactions between populations of organisms, the importance of abiotic factors in nature and how biotic factors affect organisms. By the end of the chapter, you should be able to:
- Describe what happens when organisms are forced to deal with changes
- Explain various plant adaptations
- Detail how organisms survive in extreme environments
- Identify why diversity of organisms is important for maintaining healthy ecosystems
- Analyze the factors that influence species richness
- Determine what may influence population size of a species
- Relate what field studies look like and how they differ from lab studies
You can review lessons any time and in any order that works best for you. If at any point you find yourself stuck on any information, you can ask our knowledgeable instructors for help and they can answer any questions you might have. You can access these resources at any time on a home computer or a mobile device.
1. 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.
2. What Is Habitat? - Definition & Explanation
Most people would agree that there's no place like home. In this lesson, we'll examine the biological version of a home, known as a habitat. It's important for us to know what makes up our habitat as well as other organisms' habitats.
3. 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.
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.
5. What is Biotic? - Definition, Factors & Examples
In this lesson you will learn about the biotic components in an ecosystem and the biotic factors that affect organisms. You will also have a better understanding about why planet Earth is a pretty special place.
6. Environmental Changes & Adaptation in Organisms
In this lesson, we will discuss what happens when an organism is forced to deal with environmental changes. You will learn what adaptation is and how organisms benefit from it.
7. Plant Adaptations: Types & Examples
View this lesson and you will see how many unique plants we have in the world. Learn how aquatic plants survive underwater and how desert plants survive in dry conditions.
8. Extremophiles: Definition & Examples
Extremophiles live in conditions outside the moderate environments that most life requires. From high-temperature, deep sea vents to freezing, polar oceans, we'll explore life in some of the most extreme environments on Earth.
9. What is Biodiversity? - Definition and Relation to Ecosystem Stability
Imagine making a list of all of the species you have ever heard of; it would be an enormous list! There are many different species on this planet. This lesson will explore the diversity of species, as well as the different types of diversity and how diversity of life is essential for maintaining healthy ecosystems.
10. Species Richness: Definition & Determining Factors
In this lesson, you'll learn what species richness is and what factors can influence the index of species richness. You'll also discover why it is an important index to measure in terms of conservation.
11. Factors that Affect Animal Population Size
In this lesson, you will learn about the many factors that may influence animal population size, such as nutrition, competition, and even things like parasitism.
12. Techniques for Field Studies
Not all science can be done in labs. Especially in the field of biology, research often requires leaving the lab. In this lesson we check out basic techniques for field studies and see what science looks like outside the lab.
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Other chapters within the GCSE Biology: Practice & Study Guide course
- The Process of Scientific Thinking
- Steps of the Scientific Method
- Analyzing & Evaluating Scientific Data
- Mathematics in Science
- Scientific Vocabulary & Measurement
- Cell Structure & Differentiation
- Understanding Cell Division
- Understanding Cell Transportation
- Basic Components of Living Things
- Structure & Function of the Digestive System
- The Human Circulatory System
- Non-Communicable Diseases Overview
- Communicable Disease Overview
- Disease Defense, Prevention & Treatment
- Plant Tissues & Organs
- Plant Disease & Defenses
- Homeostasis & the Human Body
- Human Nervous System Overview
- Hormones in the Endocrine & Urinary Systems
- Hormones & Reproduction
- Plant Hormones
- Sexual & Asexual Reproduction
- DNA Structure & Genomes
- Genetic Inheritance
- Genetics Disorders
- Genetic Variation & Evolution
- Genetic Engineering & Cloning
- Theories of Biology
- Evidence Supporting Evolution
- Classification of Living Organisms
- Trophic Levels & Biomass Energy
- Nutrient Cycles in an Ecosystem
- Human Impacts on Biodiversity & Ecosystems
- Food Production & Sustainability
- GCSE Biology Flashcards