About This Chapter
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- Begin your assignment or other high school biology work.
- Identify the ecology and the environment concepts that you're stuck on.
- Find fun videos on the topics you need to understand.
- Press play, watch and learn!
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- Struggle with understanding ecosystems, interspecific competition, mutualism, ecological succession, biomes, conservation biology or any other ecology and the environment topic.
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- Name the levels of ecology and ecosystems that make up the environment.
- Discuss the habitats and ecological niches within ecosystems.
- Learn about the energy flow and trophic levels within food chains.
- Describe how interspecific completion and competitive exclusion lead to niche differentiation within an ecosystem.
- Understand how camouflage, warning coloration and mimicry can affect predator/prey interactions.
- Identify different types of symbiotic relationships, such as mutualism, parasitism and commensalism.
- Learn about the different factors that shape a population, including survivorship, life histories and density.
- Explain the significance of carrying capacity and describe how it is affected by migration and dispersion.
- Take a look at the field of island biogeography and understand how colonization and dispersion occur in an isolated area.
- Discuss conservation biology and understand how it aims to reduce habitat fragmentation.
- Describe the process of ecological succession.
- Learn how ecological balance can be affected by introduced and invasive species.
- Identify the different types of biomes.
- Understand the importance of biogeochemical cycling and describe the phosphorus cycle.
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. Ecosystems, Habitats and Ecological Niches
Check out this video lesson to understand the many complex aspects of an ecosystem. See how animals live in habitats and survive amongst their surroundings.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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?
13. Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More
Take a trip around the world and learn all about different biomes. Why can you only find certain plants and animals in specific places? What are the most fertile climates on Earth? Watch on to answer these and other questions.
14. Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines
Take a trip with us in this lesson, starting in the Pacific Ocean, traveling across California through the Central Valley and up to the peaks of the Sierra Nevada mountains. We'll learn how oceans, elevation, and people can determine which types of biomes are found in different areas and check out the Earth's most massive and oldest organisms.
15. 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.
16. Fundamental Niche: Definition & Example
Species compete with other species for the same resources. But what if there was no competition? How would a given species fare? Learn about the concept of the fundamental niche.
17. Native Species: Definition & Examples
What makes a species native? Are non-native species the same as invasive species? Native species are specially adapted to fit their environment and live in the same place where they originated.
18. Pioneer Community: Definition & Explanation
In this lesson, we'll be explaining what ecological succession is and the role that pioneer species play in it. We'll explain the pioneer community and look at an example of volcanic rock.
19. Warning Coloration in Animals: Examples, Overview
This lesson will explore a unique survival skill utilized by some prey known as warning colorations. Read about the different kinds of animals that use warning coloration and why they use it, then test your knowledge with a short quiz.
20. What is an Energy Pyramid? - Definition & Examples
When organisms eat other organisms, energy is transferred. An energy pyramid can be used to diagram this flow of metabolic energy. Here we will examine the definition of an energy pyramid, look at some examples, and finish with a brief quiz.
21. 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.
22. What is Marine Biology? - Definition & Facts
Marine biology is the fascinating study of plants and animals that live in oceans and other saltwater bodies. This lesson will give a sneak peek at some of the topics marine biologists study - you'll see why it's such a popular field!
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