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Lecture 8

BIO205H5 Lecture Notes - Lecture 8: The Red Dot

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Christoph Richter

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BIO205 Lecture #8:
Slide #3: We Discussed Population Size
!We need to find unique differences.
!Tagging ex. polar bear footprints.
!Ratio of number of individuals and ratio for marked individuals should be the same.
!Find out factors that affect the population.
!Population size is not the only measure to measure of population.
Slide #4
!Can use maps to analyze population.
!Gives temporal distribution of the species.
!Look at the range of a species.
!It does not mean the species are equally distributed.
!gives idea of geographic spans.
!Just describing the range ddoes not give the full detail about distribution.
Slide #5
!There are areas where population is denser than other areas. Which would mean that the
population is bigger.
Slide #6
!Clustered --> closer resources.
!Evenly spaced --> Regular dispersion pattern. Each bird (refer to pic) protects its own
!Random --> As the wind blows.
Slide #7:
!Organisms also disperse from their original space.
!Clicker Q: Who spread so quickly
o!Humans (Already on land so no the a)
o!A Infectious Disease ( The rate was too slow).
o! An insect species (
o! A bird species (birds can disperse a longer distance) RIGHT ANSWER -->
Eurpoean starling example. In 60 yrs went all across North America.
o!An amphibian species
Slide # 8
!Within a small area it was only found in a small area.
!Distribution of most organisms whether animals or plants is patch because there are spots
where they are and there are spots where they are not.
Slide #11:
!Dots are suppose to separate out.
!The red dot plankton in lagoon.
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