1. Unit 2:
ECOLOGY

2. We share the Earth…
Ecology & Environmental Issues

3. with a whole lot of other creatures…

4. What is ecology? Ecology
the study of the interactions of living things with each other and their physical environment

5. All ecosystem(environment) can be broken down as biotic and abiotic!

6. Part I: Abiotic Factors vs Biotic Factors
physical and chemical factors which affect the ability of organisms to survive and reproduce
Abiotic Factors based on the picture
Sunlight
Oxygen
Soil
Nutrients
Water

7. More Abiotic Factors:
6. range of temperatures 7. availability of inorganic substances such as minerals 8. supply of gases such as oxygen, carbon dioxide, and nitrogen 9. pH

9. Biotic Factors based on the picture
All the living organisms that inhabit an environment
Biotic Factors based on the picture
Total number of plants
Total number of small fish, medium sized fish, large sized fish, etc.
Total number of decomposers

10. Biotic Factors in the Mangrove Ecosystem
Biotic factors are living things.
plants
animals
fungi
bacteria
plants

12. More Practice with Abiotic and Biotic Factors

13. Directions: Using the picture, make a list of all the factors that are abiotic and biotic.

14. Practice Reading Comprehension and Citing Textual Evidence

19. You must cite where you got the information from

20. Part II: Levels of Organization
Level 1. Organism
An individual living thing that is made of cells, uses energy, reproduces, responds, grows, and develops
For Example
1 deer

21. Level 2: Population
a group of organisms, all of the same species, which interbreed and live in the same area at the same time; competition occurs
For example
- All the deer in this on this mountain

22. copyright cmassengale
Level 3: Community
All the populations of different species that live in the same place at the same time.
Note: not including water, air, oxygen
For example:
All the zebra, wilder best, trees, grasses, etc. interacting.
copyright cmassengale

23. Level 4: Ecosystem
All the different populations interacting with the non-living factors.
Include all the fish, snakes, plants, rock, water, soil, minerals

25. Levels of Organization Illustration

26. Levels of Organization Illustration

27. Practice with Identifying the level of organization
Which level of organization is shown by the diagram?

28. Practice with Identifying the level of organization
Which level of organization is shown by the diagram?

29. Practice with Identifying the level of organization
Which level of organization is shown by the diagram if you take away the water, soil, air?

30. You have completed assignment # 20
Congratulation!!!!
You have completed assignment # 20