1. What would happen if we got rid of all the mosquitos?

2. What eats mosquitos?
What do mosquitos eat?

3. Exponential Growth

4. Logistic Growth A: Lag phase: slow growth B: Acceleration phase
C: Exponential phase
D: Carrying capacity D C A B

5. Figure 5-4 Logistic Growth of Yeast Population
Carrying Capacity
Section 5-1
the number of living organisms that a region can support without environmental degradation.
Carrying capacity
Number of Yeast Cells
Time (hours)

6. Human Population Growth is exponential
Industrial
Revolution
begins
Agriculture
begins
Bubonic
plague
Plowing
and
irrigation

7. Factors that limit population growth
Section Outline
Factors that limit population growth
Density-Dependent Factors
Competition for resources
Predation
Parasitism and Disease
Essentially anything “biotic”
Density-Independent Factors:
Abiotic factors:
weather and climate
natural disasters (bottlenecks)
human activity
Go to Section:

8. Biodiversity and Extinction

9. What is biodiversity? The DIVERSITY of all living things on Earth
all plants, animals, bacteria, fungi, protists

10. Why do we need biodiversity?
FOOD
Medicine we get from other animals, plants, etc.
Wood and paper products
Future resources

11. Why do we need biodiversity?
Species depend on each other.
Extinction of one species will lead to extinction of other species.

12. Endangered Species

13. Honeybee Colony Collapse Disorder
Pesticides and invasive parasites (mites) killing honeybees across the U.S.

14. Amphibian Crisis
Half of ALL amphibians on the planet are endangered because of:
Habitat Destruction
Water pollution
Invasive Species (parasitic fungus)