1. Community Interactions
EQ: What are the different types of relationships among organisms?

2. Habitat – where an organism lives
Niche – an organism’s specific role in its environment
Ex. Place in food web

3. Types of Community Interactions
Competition
Predation
Symbiosis
Mutualism
Commensalism
Parasitism

4. Competition
Occurs when members of the same or different species compete for the same resource (Food, water, shelter, space, mates)

5. Predation
An interaction when one organism captures & feeds on another (Predator/Prey)

6. Symbiosis
Any relationship where 2 sp. Live closely together
Types of Symbiosis:
Mutualism
Commensalism
Parasitism

7. Commensalisms
Mutualism
Parasitism

8. Mutualism
Both sp. Benefit
EX: Flowers & Insects
Gobi + shrimp

9. One sp. Benefits, and the other is unaffected EX: barnacles on a whale
Commensalism
One sp. Benefits, and the other is unaffected
EX: barnacles on a whale

10. Parasitism
One organism lives on or inside another and harms it
EX: Fleas on pets, tape worm

11. Ecological Succession
Ecosystems are constantly changing in response to natural and human disturbances

12. As an ecosystem changes, older inhabitants gradually die out and new organisms move in, causing further changes in the ecosystem

13. Primary Succession
Occurs on surfaces where no soil exists such as after volcanic eruptions, or on bare rock when glaciers melt.
The first species to populate the area are called pioneer species such as lichen

15. Secondary Succession
Occurs after a disturbance changes the existing community without destroying the soil.

16. Occurs when land cleared and plowed for farming is abandoned

17. Occurs when there are wildfires that burn woodlands