BIOC63Fall2013 LECTURE 1.docx
BIOC63Fall2013 LECTURE 1.docx

3 Pages
137 Views
Unlock Document

School
University of Toronto Scarborough
Department
Biological Sciences
Course
BIOC63H3
Professor
Karen Williams
Semester
Fall

Description
BIOC63Fall2013 Lecture 1 Notes: Patterns and Processes What is Biodiversity? o Umbrella term for nature’s variation o Different hierarchical levels: o Genetic diversity, species diversity (ex: flowing plants in South Africa), community (habitat) diversity (ex: small section of Canada and see how many different types of boreal forests, tropical forests etc you have in the area), ecosystem diversity, biome diversity o Media  mostly covers species biodiversity o Example: species diversity of flowering plants in South America is huge o Community diversity refers to the different species within a community  for example different types of forests within North America o o then at an even larger level, we have ecosystem and biome diversity o How many species are there? o 1.75 million species living that are described o 300 000 fossil species o 300 new species/day being described o we do not really know how many undescribed species there are  so we do not really know the total number of species o example: trachanphyta (flowering plants) about 50% is undescribed, while 96% of Chordata (vertebrates) phylum is described 1 o Great Smokey Mountains National Park (US) o mostly invertebrates (where most in unknown) and some non-vascular plants (mostly unknown), mostly known vascular plants and almost all known vertebrates o o the species that make up most of the living organisms in this park, are invertebrates  these are also the ones where most species are unknown Biodiversity through time o nothing lasts forerever o average species existence = 4 million years o diversity = speciation rate – extinction rate o background average extinction rate = 2.5 species /year  without human interference, or major catastrophe Exceptions: Livin
More Less

Related notes for BIOC63H3

Log In


OR

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


OR

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.

Submit