Class Notes (807,513)
Canada (492,691)
Biology (116)
BIOL 2200 (8)

Lecture 1- Chpt 1.docx

3 Pages
Unlock Document

University of Lethbridge
BIOL 2200
Joseph Rasmussen

Bio2200- Ecology Sept 5, 2013 What is ecology?  From Greek “Oikos”- meaning household Biosphere  Composed fo hierarchy of complex systems o Subsystems embedded with systems o Can be as small as a single organism, or as big as the entire biosphere. Biosphere  Ecosystem  Community  Population  Organism Ecosystem  Energy flux and cycling of nutrients Community  Interactions of population Population  Unit of evolution Organism  Unit of natural selection What is Ecology?  Total relationship of organisms to environment and each other (Hackel, 1870).  The struggle for existence. (Darwin, 1859).  Study of factors affecting the distribution and abundance of organisms (Krebs, 1970).  Scientific study of natural environment and the relationship of organism to one another and their surroundings (Ricklefs, 2001). Different view points  There area different ways of looking at the relationships of organisms to their environment o Some ecologists classify habitats and examine the relationship between Populations  Populations of living organisms are constantly evolving and adapting to change o Long slow process of change tracking the global environment o Complex arms race- predators are evolving ways of tactics, and prey are evolving better defense. o Constantly producing new “variants” o Changing and diversifying organisms which changes “systems” that they area part and long term change even the global environment itself Environment influence organisms  Organisms also change their environment  Over millions of years the activities of organisms have profoundly changed the global environment. Function connections: Who eats who?  Throughout history of life, plants, animals and microorganisms have evolved to carry out different and complimentary functions in natural systems o Example  Archaebacteria  Absorb and process dissolved organic matter  Eubacteria  Some eubacteria become autotrophs  Various protisis  Protozoa feed on tiny bacteria and other organic particles  Green Algae  Algae become “green:
More Less

Related notes for BIOL 2200

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.