About This Chapter
Who's it for?
Anyone who needs help learning or mastering college environmental science material will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:
- Have fallen behind in understanding conservation biology or interactions among organisms in the ecosystem.
- Need an efficient way to learn about interactions among organisms in the ecosystem.
- Learn best with engaging auditory and visual tools.
- Struggle with learning disabilities or learning differences, including autism and ADHD.
- Experience difficulty understanding your teachers.
- Missed class time and need to catch up.
- Can't access extra science learning resources at school.
How it works:
- Start at the beginning, or identify the topics that you need help with.
- Watch and learn from fun videos, reviewing as needed.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Submit questions to one of our instructors for personalized support if you need extra help.
- Verify you're ready by completing the Interactions among Organisms in the Ecosystems chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Interactions among Organisms in the Ecosystem chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
In this chapter, you'll learn the answers to questions including:
- How does interspecific competition between similar species work?
- What roles do camouflage, coloration and mimicry play during predator/prey interactions?
- How do mutualism, parasitism and other symbiotic relationships work?
- What does carrying capacity mean?
- How can conservation scientists help endangered species survive?
- In what ways do invasive and introduced species affect ecological balance?
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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?
9. Ecology Consumer: Definition & Explanation
This lesson will discuss the role of consumers in an ecosystem. It will describe their place in a food chain and how they interact with other organisms. Specific types of consumers will be presented.
10. Ecology Producer: Definition & Explanation
This lesson will define what a producer is and what its role is in an ecosystem. It will also discuss the different kinds of producers and give some specific examples of them.
11. Difference Between a Community and an Ecosystem
This lesson is about the difference between a community and an ecosystem. In this lesson, we'll go over the definition for each and some key differences. We'll also look at what makes up communities and ecosystems and some examples of each.
12. Nematoda Digestive System
Animals of the phylum Nematoda are also known as roundworms. In this lesson you'll learn about the digestive system of nematodes and what makes them unique.
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Other chapters within the Introduction to Environmental Science: Help and Review course
- Environmental Science Basics: Help and Review
- Ecosystems: Help and Review
- Evolving Ecosystems: Help and Review
- Atmospheric Science and the Environment: Help and Review
- Geological Science: Help and Review
- Biological Science: Help and Review
- Pollution of Freshwater Resources: Help and Review
- Bioremediation: Help and Review
- Land Resources: Help and Review
- Population and the Environment: Help and Review
- Food and Agricultural Resources: Help and Review
- Solid and Hazardous Waste: Help and Review
- Human Impact on the Environment: Help and Review
- Renewable Resources: Help and Review
- Nonrenewable Resources: Help and Review
- Environmental Sustainability: Help and Review
- Environmental Risk Analysis: Help and Review
- Ethical and Political Processes of the Environment: Help and Review
- Environmental Implications of Population Growth
- Types of Biomes