1. Biological control Introduced/Indicator Species
Topic 6 + 7
Biological control
Introduced/Indicator Species

2. POS
Environmental monitoring/management
Endangered species
Extinction

3. Biological Control
A way of controlling pests, using their natural enemies, rather than chemical pesticides

4. Introduced species (Exotic)
Often harm the ecosystem, by upsetting the natural balance (invasive)
Ex. Lack of natural predators
Brought in:
Accidentally
Seeds, organisms on boats/airplanes
This is why customs regulations are tight
Intentionally
as a biological control
As food source

5. Africanized killer honey bees
They are “tougher” than normal honeybees, taking over hives and reproducing
May take only 1 sting to be lethal

6. Zebra Mussels Great Lakes
They reduce the amount of food (algae) for other species

7. Cats, rabbits and foxes in Australia
Severely reduced small mammal populations

8. Bed bugs “don’t let the bed bugs bite” Hard to get rid of
Increased international travel

9. Weeds-purple loosestrife

10. Dandelions

11. Ox eye Daisy

12. Indicator Species
Organisms that are sensitive to environmental change, that will die if the area is not healthy
Ex. Amphibians (frogs, toads, salamanders)
Problems:
Acid rain, loss of habitat, pesticides, introduced species

13. Amphibians

14. Ecosystem Monitoring Scientists examine the environment Physically
mountains, lakes, cities, deforestation
Environmentally
climate, temperature, weather
Chemically
air, soil, water quality
Biologically
population and species of organisms

15. Assignment T6-7 Review Q’s Make a bar graph (computer) pg 71
Pg 67#4, pg 78#1,2,4, pg 79 #4,10,11
Make a bar graph (computer) pg 71
Read “Unit at a Glance pg 84”
Copy into your journal
Unit Review Q’s

16. Biological control…Introduced species
Review DDT as chemical control
Harming non-target organisms
Discuss the impact of a biological control
Ex. Introduction of birds to eat mosquitos

17. Changes in Ecosystems Extinction Endangered Threatened Extirpation
(Statistics)

18. Project
Endangered species assignment