Class Notes (807,051)
Canada (492,572)
Biology (2,094)
BIO205H5 (180)

BIO205 Lecture 24 (Nov 28, 2012).docx

3 Pages
Unlock Document

University of Toronto Mississauga
Christoph Richter

BIO205 Lecture 24 - Case study: do corridors have value in conservation? - Why would conservation groups file a petition against a fence along the U.S. – Mexico border o Policy; financial aspects; etc; o In 2008, conservation groups against the fence for ecological reasons - This is the reason: o Jaguar  Adult weight: 45-115 kg  Carnivore  Daily movement: at least 2-3 km  Home range: >10km^2 - Questions o Why is it more difficult for top carnivores to obtain sufficient energy resources than it is for animals lower on the food chain?  Naturally, larger animals need more food resources in order to sustain their life compared to small animals with small body sizes; creating a wall and limiting the free range of the Jaguars’ movements means that they are confined to smaller areas and eventually deplete those areas of resources  Lower trophic level organisms requires less energy than higher tropic levels because energy level is lost for every single lower step of the trophic level  The hunting methods of carnivores requires more energy and so in the end, they still need more resources  Available energy decreases with increasing trophic level o What sort of genetic changes are more common in smaller populations than large ones? Are these problematic and, if so, how?  Inbreeding in smaller populations  Genetic drift o Is it important for people to try to protect endangered species?  Yes because to create diversity of species  See discussion during lecture 23 - How to protect jaguars? o Population size is uncertain, but most likely small o Options for protection:  Protected area  Elimination of barriers such fences, roads, urban sprawl  Connect habitat through corridors - Questions o What does island biogeography suggest about the ideal design of a protected area?  Protected area should be large and close to ‘mainland’, and preferably round to avoid edge effects o What are some of the reasons why the number and size of protected areas is limited?  Finance of interest  Increase of human population which needs living spaces  Hard to find enough space for jaguars  Expense, limited avail
More Less

Related notes for BIO205H5

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.