1. Ecology

2. Ecology
“study of the interactions between the organisms and their environment”

3. Organisms environment
Ecosystems
Biotic
Abiotic
Living parts of
the ecosystem
Non-living parts of an
Organisms environment
Water, air, soil, rocks,
Minerals, metals
Plants, animals

4. Ecology Concepts Population – the organisms of the same
species in the same area at the
same time
A. Factors that limit population growth
1. land/shelter availability
2. food availability
3. used up resources
4. natural disasters

5. Community – the biotic parts of an ecosystem

6. Habitat – includes
everything the
organisms
needs to survive
A. Endangered Species
Act
B. Destroy habitat you destroy
species (deforestation)
- #1 cause of extinction

7. Niche – way of life of the organisms
A. Niche Particulars
1. mating
2. feeding
3. transportation
4. dinural v. nocturnal
5. annual rhythms
*if the niche changes, then the species must either adapt or die

8. Trophic Levels/Feeding Levels

9. Food Chain v. Food Web

10. Food Pyramid of Energy Flow
Energy is lost at each level (10% gain from previous level, 90% lost at heat)

11. Biotic Relationships

12. Biotic Relationships
“associations/relationships among living things”

13. Examples Competition – when 2 organisms compete for the same thing
A. Intraspecific v. Interspecific

14. Predation – predators eat prey
1. Predator/prey relationship
2. Kaibab Plateau

15. Symbiosis – occurs when 2 organisms or different species live in close association with one another
1. parasitism
2. mutualism

16. Parasitism “one organism obtains nutrients from a host organism”
One benefits; one suffers

17. Mutualism
Both benefit