2. Levels of Organization

3. Example: Goldfish in an aquarium

4. Population Limits Video

5. Habitat- The place where a particular population of a species lives

6. Community- the many different species that live together in a habitat
Discovery Ed
Video

7. Examples: individual fields, forests, or lakes
Ecosystem- a community and all the physical aspects of its habitat, such as the soil, water, and weather.
Examples: individual fields, forests, or lakes
Video

8. Factors within an ecosystem
Abiotic factors- The physical aspects of an ecosystem Biotic factors- The organisms in an ecosystem

9. Biodiversity- the number of species living within an ecosystem

10. Niche
The role of a species in its ecosystem.

11. Ecosystem Inhabitants
Most ecosystems contain a few large animals and some smaller animals.
Ecosystems tend to contain more plants than animal life.
The most plentiful organisms in an ecosystem are usually microscopic bacteria and protists.

13. Roles in a Food Web Producers- make their own food
Consumers- eat other organisms
Herbivores- eat only plants
Carnivores- eat only animals
Omnivores- eat plants and animals
Detritivores- consume dead organic matter and waste
Decomposers- break down and consume nutrients from organic matter.

14. Trophic Levels
90% of energy is lost at each level

15. Succession- a somewhat regular progression of species re placement - how new ecosystems are created
2 types:
Primary- Succession that occurs where plants have not grown before
Secondary- Succession that occurs in areas where there has been previous growth, such as in abandoned fields or forest clearings

16. Changes in Communities Video

17. First species to live in an area Usually fungi or bacteria
Pioneer Species
First species to live in an area
Usually fungi or bacteria

18. A Keystone Species Video

19. Ecological Succession at Glacier Bay