1. Community Interactions

2. Vocabulary
Habitat: the area where an organism lives, including biotic and abiotic factors
Niche: full range of physical and biological conditions an organism lives in plus how it uses them, includes:
Place in the habitat
Place in the food web
Range of temperature needed for survival
Physical conditions necessary for survival
When and how reproduction occurs

3. Resource Partitioning
Within an ecosystem, there is competition for resources
Water, nutrients, light, food, or space
By occupying different niches, organisms avoid competition
Example: Spruce tree habitat/different species of warblers

5. 3 types of community interactions
Competition- Same or different species attempting to use the same resource
Predation- one organism hunting and killing/eating another one
Symbiosis- Two species living closely together
Three types- mutualism, commensalism, parasitism

6. Mutualism +/+ Both species benefit from the interaction
Honeybees/plants
Remora/shark
Sea anemone/clown fish
Humans/intestinal bacteria

7. Commensalism +/0 One species benefits while the other is unaffected
Barnacle/whale
Orchids/trees

8. Parasitism +/-- One organism benefits by harming the other
Tapeworms/human
Flea/dog
Lice/human