Introduction to Ecology, Biogeography, Environment | Alison

The New Alison App has just launched Download Now

Introduction to Ecology - Revised

Learn about essential ecosystems and the effects of climate change on biodiversity, with this free online course.

Environmental Studies
Free Course
This free online Ecology course teaches you about essential ecosystems, terrestrial, and aquatic biomes, and the effects of climate change on biodiversity. Studying ecology allows us to understand the vital connections between plants, animals, humans, and the world around us. By the end of the course, you will have a much stronger understanding of how to help ensure the sustainability of our planet's core ecosystems.





View course modules


This course will first introduce you to the four levels of biological organization, which include organismal, population, community, and ecosystem. You will also study biogeography, biodiversity, population growth, and extinction risk. The course will then discuss the characteristics of the eight major terrestrial biomes, including tropical wet forests, savannas, subtropical deserts, chaparral, temperate grasslands, temperate forests, boreal forests, and the Arctic tundra. You will also study aquatic biomes, which include saltwater and freshwater biomes.

Next, the course will discuss the causes of changes in climate and the effects of global climate change. You will study modern-day climate change and its association with the increased melting of glaciers and polar ice sheets, which results in an increase in sea level. The course will then cover the effects of the Industrial Revolution, destructive harvesting, and overfishing. You will also learn how this affects important plant and animal systems.

We are all part of the global ecosystem and are dependent on it for our survival. By developing our understanding of our habitat requirements, how we influence each other, and what actions we need to take to ensure survival, we can help build a more sustainable future for everyone. This free online Introduction to Ecology course will give you an in-depth understanding of these vital topics, so check out the course today and learn something truly important about the world you live in.

Start Course Now

Learning Outcomes

After completing this course you will be able to:

  • Define ecology and the four levels of ecological research.
  • Recognize the relationship between components of the environment.
  • Recognize distinguishing characteristics of each of the major terrestrial biomes.
  • Compare and contrast the characteristics of the ocean zones.
  • Define global climate change.
  • Describe three natural factors affecting long-term global climate
  • List greenhouse gases and describe their role in the greenhouse effect.


All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire an official Certificate, which is a great way to share your achievement with the world. Your Alison Certificate is:

Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning

Alison offers 3 types of Certificates for completed Certificate courses:

Digital Certificate - a downloadable Certificate in PDF format, immediately available to you when you complete your purchase
Certificate - a physical version of your officially branded and security-marked Certificate, posted to you with FREE shipping
Framed Certificate - a physical version of your officially branded and security-marked Certificate in a stylish frame, posted to you with FREE shipping

All Certificates are available to purchase through the Alison Shop. For more information on purchasing Alison Certificates, please visit our FAQs. If you decide not to purchase your Alison Certificate, you can still demonstrate your achievement by sharing your Learner Record or Learner Achievement Verification, both of which are accessible from your Dashboard. For more details on our Certificate pricing, please visit our Pricing Page.


    You have received a new notification
    Click here to view them all