About This Chapter
NJBCT: Understanding Ecosystems - Chapter Summary
The lessons in this chapter are brief, and they can be used to help you review the characteristics of ecosystems. Videos have been made to help you cover the following topics:
- Metapopulations and conservation biology
- Ecology levels, niche differentiation and ecological niches
- Population density and dynamics
- Migration and carrying capacity
- Island biogeography
- Different forms of relationships
- Biodiversity definition
- Predator/prey relationships
- Ecological succession
- Introduced and invasive species
- The impacts humans make on the environment
- Forms of competition in ecosystems
Our talented instructors have given you enough resources to examine different aspects of an ecosystem. Utilizing lesson quizzes, you can make sure you are retaining information for the test.
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 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.
3. 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.
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. 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.
11. Human Impacts on the Environment
The human population continues to grow, but the size of Earth and the resources available for our use are limited. Humans greatly impact the world around them, and our actions can and often do have dramatic and long-lasting consequences.
12. 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.
13. 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.
14. 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?
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Other chapters within the NJBCT: Study Guide & Practice course
- NJBCT: Organic Biochemistry
- NJBCT: Understanding Enzymes
- NJBCT: Cell Biology
- NJBCT: Molecular Biology
- NJBCT: Multicellular Organisms
- NJBCT: Matter & Energy Transformations
- NJBCT: Genetics & Heredity
- NJBCT: Evolution & Diversity
- NJBCT: Scientific Method & Inquiry
- NJBCT: Using Math for Research
- NJBCT: Safety & Standards in the Lab
- NJBCT: Cooperative Scientific Learning
- NJBCT Flashcards