1. Ecology: an introduction

2. The study of the interactions that take place among organisms and their environment

3. Biosphere The part of Earth that supports life
Top portion of Earth's crust (lithosphere)
All the waters that cover Earth's surface (hydrosphere)
Atmosphere that surrounds Earth

5. Ecosystem
All the organisms living in an area and the nonliving features of their environment
Biotic – living
Abiotic – nonliving

6. Biotic
Biotic – living
Plants
Animals
Single celled organisms
Fungi

7. Abiotic
Abiotic – nonliving
Water
Air
Soil
Temperature
Sunlight

8. Parts of an Ecosystem

9. Population
All the organisms in an ecosystem that belong to the same species (biotic)

11. Community
All the populations in an ecosystem (biotic)

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14. The place in which an organism lives
Habitat
The place in which an organism lives
provides the kinds of food and shelter, the temperature, and the amount of moisture the organism needs to survive

16. Niche
The specific role that an organism plays in its ecosystem

18. Competition
Food
Space

19. Competition
Competition caused by population growth affects many organisms, including humans
Limits population size

21. Limiting Factor
Anything that restricts the number of individuals in a population.
Includes living / biotic and nonliving / abiotic features of the ecosystem

23. Carrying Capacity
The maximum number of individuals of any species that can be supported by a particular ecosystem on a long-term basis