Close-up image of monarch butterflies in a tree

Learn to put together the living pieces in the puzzle of the natural world. As an ecologist, you will investigate the relationship between organisms and their environment. The understanding of ecosystems that you will develop in this major will assist you in resolving the conflicts that arise from the interaction between the human population and our common heritage of oceans, forests, tundra, grasslands and wildlife.

This program is offered and administered by the Department of Integrative Biology within the College of Biological Science.

Admission Requirements

Ontario secondary school students applying to the program require English (ENG4U), Advanced Functions (MHF4U), 2 courses from Biology (SBI4U), Chemistry (SCH4U), Physics (SPH4U), and 2 additional 4U or 4M courses. Students that are mature, transfer, or applying from outside Ontario should visit the admission requirements page to learn about their requirements.

Learn More

Join us on October 6 for our Online Environment Program Information Night, to learn more about OAC's environment-related programs. This event will include a program presentation and panel including current students, recent alumni, and faculty to answer all your questions!

Learn more and register for the Online Environment Program Information night here.

Sample First Year Courses

Semester 1

  • Discovering Biodiversity
  • General Chemistry I
  • Introduction to Environmental Sciences
  • Elements of Calculus I

Semester 2

  • Introduction to Molecular and Cellular Biology
  • General Chemistry II
  • Intro to Environmental Economics, Law & Policy
  • Introduction to the Biophysical Environment

Full course descriptions and a listing of second, third and fourth year courses, can be found in the Undergraduate Calendar here. 

Life as an Ecology Student

Sometimes the best way to learn about a program is through meeting a current student. Read about student experiences through the following student profiles:

Career Opportunities

  • Habitat conservation and restoration consultant
  • Environmental protection agent
  • Scientific writer/editor
  • Park planner
  • Conservation ecologist


Our OAC Student Liaison team is here to help! Have you applied to or are you considering this program, but have some questions? Find answers to our most frequently asked questions here.

Still have questions/inquires? Ask us! Our team of program experts will happily answer your questions or direct them to the people who can. Ask your questions here.