Class Notes (808,754)
Canada (493,378)
Biology (6,677)
Biology 1001A (1,723)
Tom Haffie (1,166)

Biology 1001A - Lecture 23.docx

2 Pages
Unlock Document

Western University
Biology 1001A
Tom Haffie

Biology 1001A Lecture 23: Communication Ecology II Outline:  Diversity, Trophic Levels, Complexity  Patterns in Diversity  Succession, Disturbances, More Diversity! Demonstrating Competition  Competition is major factor that shapes communities and affects the locations of species (habitats)  2 species of mussels o Smaller species are found on shallow portions of rocks o Larger species are found deeper portion of rocks  Experiment shows that if your remove larger species, the smaller expand to deeper portions AND shallow portions.  If you remove shallow water species, nothing happens. Larger species remain in deep area o Therefore, competition does affect structure of a community, distribution of mussels. o It ALSO tells us that the deep-water species are better competitors. Affects the presence of the smaller species in the deep water. Species Richness, Evenness, Diversity  Species Diversity of a community reflects 2 aspects: o Species Richness  Number of different species in a community o Evenness  Abundance of those different species Trophic Levels  “Food-Web”  What the specie eats and what eats it, is the trophic level o Level I is Primary Producers (photosynthetic plankton) o Level II are the Primary Consumers o Level III Secondary Consumers o Level IV Tertiary Consumers o Level V+ …  Majority of energy green plants produce does NOT make it to the food chain top o Rest of this energy dissipates because energy is lost when animal dies. This energy goes to the decomposing chain.  Complex Community
More Less

Related notes for Biology 1001A

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.