1. EQ: How are organisms distributed in their habitat?

2. Not all organisms are spread throughout their environment in the same way.
Population density is a measurement of the number of individuals living in a defined space.
Scientists can calculate population density:

3. Population dispersion refers to how a population is spread in an area.
Geographic dispersion of a population shows how individuals in a population are spaced.
Population dispersion refers to how a population is spread in an area.
There are three types of population dispersion:
DRAW AND LABEL
THESE 
Clumped
dispersion
Uniform
Random

4. Clumped Dispersion

5. Uniform Dispersion

6. Random Dispersion

7. Which of the three diagrams represents uniform dispersion?1 2 3
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8. Which of the three diagrams represents random dispersion?1 2 3
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9. Which of the three diagrams represents clumped dispersion?1 2 3
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10. A survivorship curve is a diagram showing the number of surviving members over time from a measured set of births.
It shows the reproductive strategies of a species.

11. Survivorship curves can be type I, II or III.
Type I —low level of infant mortality and an older population
common to large mammals and humans
Both parents generally share care for the young
Protect them to help them survive longer
Takes a lot of time and energy = high investment

12. Type II —survivorship rate is equal at all stages of life
common to birds and reptiles
The species have equal chances of living and dying, whether from
disease or
predation

13. Type III—very high birth rate, very high infant mortality
common to invertebrates and plants
Parents to not take care of their young. They produce a lot of young to increase the likelihood of survival
Many will die
due to
predation

14. What does the graph show?
How fast organisms die in years.
The % of organisms that die each day.
Survival rates of offspring over time.
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15. Which survivorship curve indicates that the parents gave a lot of offspring and leave them to defend for themselves, causing high early mortality rates? A B C
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16. Which survivorship curve indicated that the parents have high investment in the young?B C
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