Class Notes (839,574)
Canada (511,407)
Biology (1,911)
BIOL 2060 (126)
xx (10)
Lecture 10

Ecology Lecture 10.doc

4 Pages
128 Views

Department
Biology
Course Code
BIOL 2060
Professor
xx

This preview shows page 1. Sign up to view the full 4 pages of the document.
Description
Ecology Lecture 10 * * Populus: http://www.cbs.umn.edu/populus  For plotting these growth curves Logistic Growth - As resources are depleted, population growth rate slows & eventually stops - Population growth curve looks more like a sigmoid (S-shaped) curve (logistic growth) - Carrying capacity (K) is the number of individuals of a population that the environment can support. - Finite amount of resources can only support a finite number of individuals. (Population size vs. time) (Growth rate vs. population size)  Plotting first derivative of previous graph  DEF. ON EXAMS – don’t confuse the 2 graphs  Factors needed ^ Logistic Growth What is the mechanism? (What is actually happening in nature?) Density Dependence As N increases the per capita birthrates (b) decreases & the per capita death rate (d) increases. Linear birth rate function: b = b –0aN - b0(intercept) = birth rate under ideal conditions (unlimited growth) - a (slope) = decreasing rate of change - b = actual birth rate  Decreasing Linear death rate function: d = d +0cN - d0(intercept) = death rate under ideal conditions - c (slope) = increasing rate of change - d = actual death rate  Increasing  No need to reproduce this example ** Applications of Logistic Growth - Fisheries management  Where anything is growing biologically - Maximum sustainable yields: based on the concept seen in logistic curves (when a populati
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

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