1. Pick up handouts (one per partner group) and take out notebooks!
AGENDA –
Pick up handouts (one per partner group) and take out notebooks!
Bell-Ringer: Food Web
Symbiosis Notes
Symbiosis Practice

2. SNAKE
PAUL WALKER
COYOTE
COW
BIRD
BEETLE
GRASS
BERRIES

3. Bell-Ringer Questions
What are the autotrophs in this food web?
Which organism(s) is both a primary and secondary consumer?
If the grass has 124 kcals of energy, how much of this energy will Paul Walker consume from the cow?

4. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
A relationship between organisms of different species is called symbiosis.
Five kinds of symbiosis are recognized:
1. mutualism,
2. commensalism,
3. parasitism,
4. predation
5. competition
Section 2.1 Summary – pages

5. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
Mutualism
A symbiotic relationship in which both species benefit is called mutualism.
Section 2.1 Summary – pages

6. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
Commensalism
Commensalism is a symbiotic relationship in which one species benefits and the other species is unaffected.
Section 2.1 Summary – pages

7. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
Parasitism
A symbiotic relationship one species benefits and the other is harmed is called parasitism.
Section 2.1 Summary – pages

8. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
Parasitism
Parasites have evolved in such a way that they harm, but usually do not kill the host species.
Tape Worms in Intestine
Section 2.1 Summary – pages

9. Section 2.1 Summary – pages 35 - 45
In a predator and prey relationships one species benefits and the other is killed.
Predators seek out and eat other organisms.
Predation is found in all ecosystems and includes organisms that eat plants and animals.
Section 2.1 Summary – pages

10. Section 2.1 Summary – pages 35 - 45
SYMBIOSIS
Competition
The use of the same limited resource by two or more species in the same place at the same time.
– Resource = anything necessity of life (water, nutrients, light, food, or space)
Competition may cause the development of different niches or physical characteristics.
Section 2.1 Summary – pages

11. Symbiotic Relationships
Let’s Practice!
Symbiotic Relationships

12. What symbiotic relationship is this?
Acacia Plant & Ants
The ants lay eggs on acacia tree so they get a nice safe place for their eggs. The acacia covers the infected area with brown flesh (called a gall.) The plant has to use valuable resources to create the gall.
parasitism
What symbiotic relationship is this?

13. What symbiotic relationship is this?
Boxer Crab & Anemones
This Boxer Crab carries a pair of stinging anemones in its claws, which it uses to defend itself from predators. The anemones get to move around which increases their food supply.
mutualism
What symbiotic relationship is this?

14. Emperor Shrimp & Sea Cucumber
This tiny emperor shrimp is riding along on the back of a sea cucumber (a long worm-like starfish relative) while it crawls along a sandy bottom. The shrimp gets to travel around under the protection of its much larger partner, and the sea cucumber doesn't seem to mind.
commensalism
What symbiotic relationship is this?

15. What symbiotic relationship is this?
Cattle & Cattle Egrets
As these cattle walk around eating grass they stir up lots of insects. The egrets hang around and get a yummy meal of insects.
What symbiotic relationship is this?
commensalism

16. What symbiotic relationship is this?
Loa Loa Worm & Human
This worm infects human the blood stream and gets a nice warm safe home there. The human may go blind or have other complications as a result.
What symbiotic relationship is this?
parasitism

17. Goby and Alpheid Shrimp
This alpheid shrimp (on
the right) uses its strong claws like a bulldozer to create a burrow in the sand. The shrimp is nearly blind. It relies upon its partner, the sharp-eyed goby, to warn of danger. When a potential predator approaches, both animals disappear quickly into the burrow
mutualism
What symbiotic relationship is this?