1. Environmental Interdependence
Coexisting in an ecosystem

2. Plant-Herbivore Interaction
A relationship between plants and the animals that eat them
Ex. A cow eating grass
Ex. A deer eating leaves from a tree

3. Plant-Herbivore Interaction

4. Predator- Prey
Predator- members of a species that capture and eat members of another species
2 types of predators
Carnivores
Omnivores
Prey- the members of the species that are captured and eaten
Ex. A hawk hunting and consuming a rabbit
Ex. Lions hunting and consuming a zebra

5. Predator- Prey

6. Competition
A relationship in which organisms use the same resources at the same time in the same place so they must compete with each other for the use of the resources
Competitive Exclusion
The extinction of one species in an area due to competition with another species
Ex. Two male alligators compete for territory and for females. One male will be more dominant than the other and better able to survive.
Ex. Two different species of birds compete with each other for the same nesting space, food source, and water supply. One of the species will be more successful that the other species and the other species will fail .

7. Competition

8. Cooperation
A relationship within certain populations to work together for a common goal
Ex. Social insects, such as honeybees, termites, and ants (they form colonies and divide the labor)
Ex. Wolves form a pack( they work together to hunt and kill prey and rear their young)

9. Cooperation

10. Symbiosis
Living together

11. Symbiosis
Relationships in which two organisms of different species live together very closely
3 types
Mutualism
Commensalism
Parasitism

12. Mutualism
Two different species both benefits from their relationship with each other
Ex. Flowering plants and pollinators (the flowers provide the insects with nectar and pollen. In turn the insect go from flower to flower and help pollinate the plants)

13. Mutualism

14. Commensalism
Relationship in which one species benefits and the other species in neither helped nor harmed
Ex. Barnacles and whales (The barnacles benefit by attaching to the whale and as the whale moves the barnacles can filter feed. The whale is unaffected)

15. Commensalism

16. Parasitism
Relationship in which one organism benefits at the expense of the other organism
Parasite- live in or on another organism
Host- the organism that is being weakened by the parasite
Ex. Roundworms and dogs (dogs=host, roundworm=parasite)

17. Parasitism