1. Environmental Science with Ms. Kohnke Color of the day: RED
How species interact
Environmental Science with Ms. Kohnke
Color of the day: RED

2. Objective
Students will understand and identify the meaning of symbiosis and its variations

3. Symbiosis A close relationship between two different organisms
Overtime, species in close relationships may coevolve. These species may evolve adaptations that reduce the harm or improve the benefit of the relationship.

4. Major types of Symbiosis
Competition
Predation
Parasitism
Mutualism
Commensalism

5. Types of Symbiosis Interaction Species A Species B Description Example
Competition
Harmed
Each species negatively affects the other
Fox and coyote are predators of the same prey
Predations and Parasitism
Benefited
Species A feeds on species B
Coyote feeds on rabbits
Tick feeds on coyote
Mutualism
Each species is helpful to the other
Bee pollinates a flower and gets pollen; bee spreads pollen
Commensalism
Unaffected
Species A benefits from species B, but B is unaffected
Robin makes nest without affecting the tree

6. Competition
Relationship where both species, try to use the same resource, where both are negatively affected
Give me an example

7. Predation
Relationship where one species (predator) feeds on anther species (prey)
A predator of one species can be prey to another
Most organisms have evolved a way to avoid or defend against predators
Give me an example

8. Parasitism
Relationship where one species (parasite) benefits from the other species (host) who is usually harmed
Give me an example

9. Mutualism Relationship where both species benefit Give me an example
Many species depend on the other for survival and could not exist without the other
Give me an example

10. Commensalism
Relationship where one species benefits and the other is unaffected
Give me an example